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Author Arevalo-Ramirez, T.; Villacres, J.; Fuentes, A.; Reszka, P.; Cheein, F.A.A. doi  openurl
  Title Moisture content estimation of Pinus radiata and Eucalyptus globulus from reconstructed leaf reflectance in the SWIR region Type
  Year 2020 Publication Biosystems Engineering Abbreviated Journal Biosyst. Eng.  
  Volume 193 Issue Pages 187-205  
  Keywords SWIR reconstruction; Machine learning; Spectral indices; Fuel moisture content; Equivalent water thickness  
  Abstract Valparaiso, a central-southern region in Chile, has one of the highest rates of wildfire occurrence in the country. The constant threat of fires is mainly due to its highly flammable forest plantation, composed of 97.5% Pinus radiata and Eucalyptus globulus. Fuel moisture content is one of the most relevant parameters for studying fire spreading and risk, and can be estimated from the reflectance of leaves in the short wave infra-red (SWIR) range, not easily available in most vision-based sensors. Therefore, this work addresses the problem of estimating the water content of leaves from the two previously mentioned species, without any knowledge of their spectrum in the SWIR band. To this end, and for validation purposes, the reflectance of 90 leaves per species, at five dehydration stages, were taken between 350 nm and 2500 nm (full spectrum). Then, two machine-learning regressors were trained with 70% of the data set to determine the unknown reflectance, in the range 1000 nm-2500 nm. Results were validated with the remaining 30% of the data, achieving a root mean square error less than 9% in the spectrum estimation, and an error of 10% in spectral indices related to water content estimation. (C) 2020 IAgrE. Published by Elsevier Ltd. All rights reserved.  
  Address [Arevalo-Ramirez, Tito; Villacres, Juan; Auat Cheein, Fernando A.] Univ Tecn Fedrico Santa Maria, Dept Ingn Elect, Valparaiso, Chile, Email: fernando.auat@usm.cl  
  Corporate Author Thesis  
  Publisher Academic Press Inc Elsevier Science Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1537-5110 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000526114500016 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 1150  
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Author Arevalo-Ramirez, TA.; Castillo, AHF.; Cabello, PSR.; Cheein, FAA. doi  openurl
  Title Single bands leaf reflectance prediction based on fuel moisture content for forestry applications Type
  Year 2021 Publication Biosystems Engineering Abbreviated Journal Biosyst. Eng.  
  Volume 202 Issue Pages 79-95  
  Keywords Leaf water index; Machine learning; Remote sensing; Wildfire; Wildland fuels  
  Abstract Vegetation indices can be used to perform quantitative and qualitative assessment of vegetation cover. These indices exploit the reflectance features of leaves to predict their biophysical properties. In general, there are different vegetation indices capable of describing the same biophysical parameter. For instance, vegetation water content can be inferred from at least sixteen vegetation indices, where each one uses the reflectance of leaves in different spectral bands. Therefore, if the leaf moisture content, a vegetation index and the reflectance at the wavelengths to compute the vegetation index are known, then the reflectance in other spectral bands can be computed with a bounded error. The current work proposes a method to predict, by a machine learning regressor, the leaf reflectance (spectral signature) at specific spectral bands using the information of leaf moisture content and a single vegetation index of two tree species (Pinus radiata, and Eucalyptus globulus), which constitute 97.5% of the Valparai ' so forests in Chile. Results suggest that the most suitable vegetation index to predict the spectral signature is the Leaf Water Index, which using a Kernel Ridge Regressor achieved the best prediction results, with an RMSE lower than 0.022, and an average R2 greater than 0.95 for Pinus radiata and 0.81 for Eucalyptus globulus, respectively. (c) 2020 IAgrE. Published by Elsevier Ltd. All rights reserved.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1537-5110 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000613400300008 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1346  
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Author Beya-Marshall, V.; Arcos, E.; Seguel, O.; Galleguillos, M.; Kremer, C. doi  openurl
  Title Optimal irrigation management for avocado (cv. 'Hass') trees by monitoring soil water content and plant water status Type
  Year 2022 Publication Agricultural Water Management Abbreviated Journal Agric. Water Manag.  
  Volume 271 Issue Pages 107794  
  Keywords Water productivity; Stem water potential; Baseline; Frequency domain reflectometry; Irrigation scheduling; Yield; Water scarcity  
  Abstract Irrigation scheduling based on soil water content (Ow) sensors requires that Ow be maintained within a range (management lines) that is optimal for plant growth. The lower limit or “breaking point ” is determined following the soil water content dynamics on the transition of a rapid rate of depletion to a slower, under similar reference evapotranspiration. Although this criterion is practical, its implementation should be validated with plant water status measurement that contemplate weather condition, such as stem water potential “non-stressed ” baseline (Tx as a function of vapor-pressure deficit (VPD) in Ow conditions that do not limit yield). A study was con-ducted on a mature cv. 'Hass' avocado orchard in Central Chile during two seasons. There were 5 irrigation treatments: T1, Control; T2 and T3 with 29% less and 25% more of what was applied in T1, respectively; T4 and T5 same as Control until first and second fruit drop abscission, respectively, and then with 29% less. T1 trees were irrigated using a continuous frequency domain reflectometry (FDR) probe to maintain the root zone be-tween field capacity and the breaking point. There was biweekly monitoring of the Ow prior to irrigation, Tx and VPD. The Tx decline proportional to the intensity and the timing of water restriction; however, no treatment affected the crop load in either season. T2 did not show significant detrimental in fruit size, production and maturation, despite that frequently reached water content levels at the limit of the breaking point, and showed lower levels of stem water potential than Control, being the treatment with the highest water productivity. The results confirm that breaking point is an effective criterion to establish irrigation management. Additionally, when comparing the baseline for our non-stressed trees with a baseline from full irrigation treatments obtained from the literature, 30% water savings were achieved.  
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  Corporate Author Thesis  
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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0378-3774 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000831063900003 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1615  
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Author Bitran, E.; Rivera, P.; Villena, M.J. pdf  doi
openurl 
  Title Water management problems in the Copiapo Basin, Chile: markets, severe scarcity and the regulator Type
  Year 2014 Publication Water Policy Abbreviated Journal Water Policy  
  Volume 16 Issue 5 Pages 844-863  
  Keywords Aquifers; Economic incentives; Regulations; Sustainable water management; Water markets  
  Abstract This research focuses on the determination of the factors that led to the failure of water management in the Copiapo Basin in Chile. Interestingly, the existence of full private ownership and free tradability of water rights has not prevented the overexploitation of groundwater resources. In the paper, firstly, water regulation and the role of the regulator in Chile are briefly discussed. Secondly, the evolution of water resources in the Copiapo region is characterized and analyzed, and the granting of water use rights in the basin in the last 30 years is concisely described. Thirdly, we examine and analyze prices and quantities traded in the water market of the Copiapo region. We will argue that this crisis is a consequence first of failure in regulatory implementation and second of an extremely rigid regulatory framework that leaves limited room for adjustment to changing conditions, especially regarding the emergence of new information concerning water availability. We believe this investigation is not only relevant for this case in particular, but also for other regions and countries where water markets are in place.  
  Address [Bitran, Eduardo; Villena, Marcelo J.] Univ Adolfo Ibanez, Fac Engn & Sci, Santiago, Chile, Email: marcelo.villena@uai.cl  
  Corporate Author Thesis  
  Publisher Iwa Publishing Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1366-7017 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000349029200005 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 449  
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Author Carrera, P.; Campo, R.; Mendez, R.; Di Bella, G.; Campos, J.L.; Mosquera-Corral, A.; Val del Rio, A. pdf  doi
openurl 
  Title Does the feeding strategy enhance the aerobic granular sludge stability treating saline effluents? Type
  Year 2019 Publication Chemosphere Abbreviated Journal Chemosphere  
  Volume 226 Issue Pages 865-873  
  Keywords Aerobic granular sludge; Fish canning wastewater; Nutrients removal; Salinity; AOB  
  Abstract The development and stability of aerobic granular sludge (AGS) was studied in two Sequencing Batch Reactors (SBRs) treating fish canning wastewater. R1 cycle comprised a fully aerobic reaction phase, while R2 cycle included a plug-flow anaerobic feeding/reaction followed by an aerobic reaction phase. The performance of the AGS reactors was compared treating the same effluents with variable salt concentrations (4.97-13.45 g NaCl/L) and organic loading rates (OLR, 1.80-6.65 kg CODs/(m(3).d)). Granulation process was faster in R2 (day 34) than in R1 (day 90), however the granular biomass formed in the fully aerobic configuration was more stable to the variable feeding composition. Thus, in R1 solid retention times (SRT), up to 15.2 days, longer than in R2, up to 5.8 days, were achieved. These long SRT5 values helped the retention of nitrifying organisms and provoked the increase of the nitrogen removal efficiency to 80% in R1 while it was approximately of 40% in R2. However, the presence of an anaerobic feeding/reaction phase increased the organic matter removal efficiency in R2 (80-90%) which was higher than in R1 with a fully aerobic phase (75-85%). Furthermore, in R2 glycogen-accumulating organisms (GAOs) dominated inside the granules instead of phosphorous-accumulating organisms (PADS), suggesting that GAOs resist better the stressful conditions of a variable and high-saline influent. In terms of AGS properties an anaerobic feeding/reaction phase is not beneficial, however it enables the production of a better quality effluent. (C) 2019 Elsevier Ltd. All rights reserved.  
  Address [Carrera, P.; Mendez, R.; Mosquera-Corral, A.; Val del Rio, A.] Univ Santiago de Compostela, Sch Engn, Dept Chem Engn, E-15782 Santiago De Compostela, Galicia, Spain, Email: paula.carrera@usc.es;  
  Corporate Author Thesis  
  Publisher Pergamon-Elsevier Science Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0045-6535 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000468709500094 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 1020  
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Author Carrera, P.; Mosquera-Corral, A.; Mendez, R.; Campos, J.L.; del Rio, A.V. pdf  doi
openurl 
  Title Pulsed aeration enhances aerobic granular biomass properties Type
  Year 2019 Publication Biochemical Engineering Journal Abbreviated Journal Biochem. Eng. J.  
  Volume 149 Issue Pages 7 pp  
  Keywords Aerobic granular sludge; Pulsed aeration; Phosphate accumulating organisms; Low-strength wastewater  
  Abstract The reduced footprint of Aerobic Granular Sludge (AGS) systems constitutes a good alternative to conventional treatments, despite their associated drawbacks (long start-up periods and high aeration requirements for granules formation and integrity). This study presents a pulsed aeration regime as a strategy to overcome these problems. Two AGS sequencing batch reactors (SBRs) were operated treating low-strength wastewater (190 mg COD/L) with pulses of 1 s ON/2 s OFF (R1) and continuous aeration (R2). Initially, different superficial gas velocities (SGV) of 3.6 cm/s (R1) and 1.2 cm/s (R2) were imposed for the same airflow (448 L/cycle). The granulation process was completed in 38 days for R1 whereas it took 48 days for R2. Denser and smaller granules were formed with pulsed regime and phosphate accumulating organisms were developed faster. The removal efficiencies were practically the same in both SBRs, being of 85% for COD, 95% for phosphorus and 30% for nitrogen. After granules formation the airflow in both reactors was reduced. For a SGV of 1.2 cm/s both systems behaved similarly. The minimum SGV required to maintain a uniform mixture of the biomass inside the reactor was 1.2 (R1) and 0.5 cm/s (R2), meaning less air consumption in the pulsed system (149 L/cycle) compared to the continuous one (179 L/min). Therefore, pulsed aeration successfully reduced granulation periods and aeration requirements in AGS systems.  
  Address [Carrera, P.; Mosquera-Corral, A.; Mendez, R.; Val del Rio, A.] Univ Santiago de Compostela, Dept Chem Engn, Sch Engn, E-15782 Santiago De Compostela, Spain, Email: paula.carrera@usc.es;  
  Corporate Author Thesis  
  Publisher Elsevier Science Bv Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1369-703x ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000475997900003 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 1014  
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Author Crutchik, D.; Campos, J.L. doi  openurl
  Title Municipal Wastewater Reuse: Is it a Competitive Alternative to Seawater Desalination? Type
  Year 2021 Publication Sustainability Abbreviated Journal Sustainability  
  Volume 13 Issue 12 Pages 6815  
  Keywords economic analysis; non-conventional water resources; resource recovery; water; water scarcity  
  Abstract Water scarcity is becoming a global challenge to attempts to narrow the water demand-supply gap. To overcome this problem, it is sensible to consider alternative technologies that can exploit non-conventional water resources. The choice of such technologies should be, however, carefully analyzed, because any choice might be unfeasible from an economic point of view. In this work, a methodology to select the most appropriate non-conventional water resource, out of municipal wastewater and seawater, was proposed. Specifically, we attempted to determine which alternative provides cheaper water supply and production costs for domestic uses, depending on the wastewater treatment system used and the water plant capacity. The production of water under three scenarios was analyzed: (i) a city that has a conventional wastewater treatment plant (WWTP); (ii) a city that uses primary treatment and submarine outfalls to treat municipal wastewater; (iii) seawater desalination. The proposed methodology was tested in Chilean cities that are located in areas where water is a scarce resource. The results showed that the reuse of municipal wastewater represents a cost-competitive alternative to seawater desalination, mainly when municipal wastewater is treated in a conventional WWTP and when water flow demand is higher than 1500 m(3)/d. In contrast, seawater desalination becomes more profitable than wastewater reuse when the treatment of municipal wastewater is based on the use of submarine outfalls. This study provides a useful economic tool for promoting municipal wastewater reuse as a non-conventional water source for supplying water to cities that suffer from water scarcity in Chile and in similar areas of the world.  
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  Corporate Author Thesis  
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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2071-1050 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000667361600001 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1428  
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Author Crutchik, D.; Morales, N.; Vazquez-Padin, J.R.; Garrido, J.M. pdf  doi
openurl 
  Title Enhancement of struvite pellets crystallization in a fullscale plant using an industrial grade magnesium product Type
  Year 2017 Publication Water Science And Technology Abbreviated Journal Water Sci. Technol.  
  Volume 75 Issue 3 Pages 609-618  
  Keywords industrial magnesium hydroxide; municipal wastewater; phosphorus recovery; struvite pellets  
  Abstract A full-scale struvite crystallization system was operated for the treatment of the centrate obtained from the sludge anaerobic digester in a municipal wastewater treatment plant. Additionally, the feasibility of an industrial grade Mg(OH) (2) as a cheap magnesium and alkali source was also investigated. The struvite crystallization plant was operated for two different periods: period I, in which an influent with low phosphate concentration (34.0 mg P . L (-1)) was fed to the crystallization plant; and period II, in which an influent with higher phosphate concentration (68.0 mg P . L (-1)) was used. A high efficiency of phosphorus recovery by struvite crystallization was obtained, even when the effluent treated had a high level of alkalinity. Phosphorus recovery percentage was around 77%, with a phosphate concentration in the effluent between 10.0 and 30.0 mg P .L- 1. The experiments gained struvite pellets of 0.5- 5.0 mm size. Moreover, the consumption of Mg(OH) (2) was estimated at 1.5 mol Mg added . mol P recovered (-1). Thus, industrial grade Mg(OH) (2) can be an economical alternative as magnesium and alkali sources for struvite crystallization at industrial scale.  
  Address [Crutchik, D.; Garrido, J. M.] Univ Santiago de Compostela, Inst Technol, Dept Chem Engn, Santiago De Compostela 15782, Spain, Email: dafne.crutchik@gmail.com  
  Corporate Author Thesis  
  Publisher Iwa Publishing Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0273-1223 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000394350100013 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 710  
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Author Fra-Vazquez, A.; Morales, N.; Figueroa, M.; del Rio, A.V.; Regueiro, L.; Campos, J.L.; Mosquera-Corral, A. pdf  doi
openurl 
  Title Bacterial community dynamics in long-term operation of a pilot plant using aerobic granular sludge to treat pig slurry Type
  Year 2016 Publication Biotechnology Progress Abbreviated Journal Biotechnol. Prog.  
  Volume 32 Issue 5 Pages 1212-1221  
  Keywords aerobic process; granular sludge; bacterial diversity; applied microbiology; wastewater treatment  
  Abstract Aerobic granular sludge represents an interesting approach for simultaneous organic matter and nitrogen removal in wastewater treatment plants. However, the information about microbial communities in aerobic granular systems dealing with industrial wastewater like pig slurry is limited. Herein, bacterial diversity and dynamics were assessed in a pilot scale plant using aerobic granular sludge for organic matter and nitrogen elimination from swine slurry during more than 300 days. Results indicated that bacterial composition evolved throughout the operational period from flocculent activated sludge, used as inoculum, to mature aerobic granules. Bacterial diversity increased at the beginning of the granulation process and then declined due to the application of transient organic matter and nitrogen loads. The operational conditions of the pilot plant and the degree of granulation determined the microbial community of the aerobic granules. Brachymonas, Zoogloea and Thauera were attributed with structural function as they are able to produce extracellular polymeric substances to maintain the granular structure. Nitrogen removal was justified by partial nitrification (Nitrosomonas) and denitrification (Thauera and Zoogloea), while Comamonas was identified as the main organic matter oxidizing bacteria. Overall, clear links between bacterial dynamics and composition with process performance were found and will help to predict their biological functions in wastewater ecosystems improving the future control of the process. (c) 2016 American Institute of Chemical Engineers Biotechnol. Prog., 32:1212-1221, 2016  
  Address [Fra-Vazquez, A.; Morales, N.; Figueroa, M.; Val del Rio, A.; Regueiro, L.; Mosquera-Corral, A.] Univ Santiago de Compostela, Inst Technol, Grp Environm Engn & Bioproc, Dept Chem Engn, Santiago De Compostela 15705, Spain, Email: andrea.fra@usc.es  
  Corporate Author Thesis  
  Publisher Wiley-Blackwell Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 8756-7938 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000387787600013 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 681  
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Author Jungles, M.K.; Val del Rio, A.; Mosquera-Corral, A.; Campos, J.L.; Mendez, R.; Costa, R.H.R. pdf  doi
openurl 
  Title Effects of Inoculum Type and Aeration Flowrate on the Performance of Aerobic Granular SBRs Type
  Year 2017 Publication Processes Abbreviated Journal Processes  
  Volume 5 Issue 3 Pages 10 pp  
  Keywords aeration flowrate; aerobic granules; inoculum; sequencing batch reactor; wastewater  
  Abstract Aerobic granular sequencing batch reactors (SBRs) are usually inoculated with activated sludge which implies sometimes long start-up periods and high solids concentrations in the effluent due to the initial wash-out of the inoculum. In this work, the use of aerobic mature granules as inoculum in order to improve the start-up period was tested, but no clear differences were observed compared to a reactor inoculated with activated sludge. The effect of the aeration rate on both physical properties of granules and reactor performance was also studied in a stable aerobic granular SBR. The increase of the aeration flow rate caused the decrease of the average diameter of the granules. This fact enhanced the COD and ammonia consumption rates due to the increase of the DO level and the aerobic fraction of the biomass. However, it provoked a loss of the nitrogen removal efficiency due to the worsening of the denitrification capacity as a consequence of a higher aerobic fraction.  
  Address [Jungles, Mariele K.; Costa, Rejane H. R.] Fed Univ Santa Catarina UFSC, CTC, ENS, Dept Sanit & Environm Engn, BR-88010970 Florianopolis, SC, Brazil, Email: marielejungles@hotmail.com;  
  Corporate Author Thesis  
  Publisher Mdpi Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2227-9717 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000412051700009 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 944  
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Author Lagos, N.A.; Benitez, S.; Grenier, C.; Rodriguez-Navarro, A.B.; Garcia-Herrera, C.; Abarca-Ortega, A.; Vivanco, J.F.; Benjumeda, I.; Vargas, C.A.; Duarte, C.; Lardies, M.A. doi  openurl
  Title Plasticity in organic composition maintains biomechanical performance in shells of juvenile scallops exposed to altered temperature and pH conditions Type
  Year 2021 Publication Scientific Reports Abbreviated Journal Sci. Rep.  
  Volume 11 Issue 1 Pages 24201  
  Keywords OCEAN ACIDIFICATION; ELEVATED-TEMPERATURE; COMPENSATORY MECHANISM; SEAWATER ACIDIFICATION; CLIMATE-CHANGE; IMPACTS; BIOMINERALIZATION; RESPONSES; MUSSELS; INTENSIFICATION  
  Abstract The exposure to environmental variations in pH and temperature has proven impacts on benthic ectotherms calcifiers, as evidenced by tradeoffs between physiological processes. However, how these stressors affect structure and functionality of mollusk shells has received less attention. Episodic events of upwelling of deep cold and low pH waters are well documented in eastern boundary systems and may be stressful to mollusks, impairing both physiological and biomechanical performance. These events are projected to become more intense, and extensive in time with ongoing global warming. In this study, we evaluate the independent and interactive effects of temperature and pH on the biomineral and biomechanical properties of Argopecten purpuratus scallop shells. Total organic matter in the shell mineral increased under reduced pH (similar to 7.7) and control conditions (pH similar to 8.0). The periostracum layer coating the outer shell surface showed increased protein content under low pH conditions but decreasing sulfate and polysaccharides content. Reduced pH negatively impacts shell density and increases the disorder in the orientation of calcite crystals. At elevated temperatures (18 degrees C), shell microhardness increased. Other biomechanical properties were not affected by pH/temperature treatments. Thus, under a reduction of 0.3 pH units and low temperature, the response of A. purpuratus was a tradeoff among organic compounds (biopolymer plasticity), density, and crystal organization (mineral plasticity) to maintain shell biomechanical performance, while increased temperature ameliorated the impacts on shell hardness. Biopolymer plasticity was associated with ecophysiological performance, indicating that, under the influence of natural fluctuations in pH and temperature, energetic constraints might be critical in modulating the long-term sustainability of this compensatory mechanism.  
  Address  
  Corporate Author Thesis  
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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2045-2322 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000731322900005 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1522  
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Author Lardies, MA.; Caballero, P.; Duarte, C.; Poupin, MJ. doi  openurl
  Title Geographical Variation in Phenotypic Plasticity of Intertidal Sister Limpet's Species Under Ocean Acidification Scenarios Type
  Year 2021 Publication Frontiers in Marine Science Abbreviated Journal Front. Mar. Sci.  
  Volume 8 Issue Pages 647087  
  Keywords METABOLIC-RATE; CLIMATE-CHANGE; SEAWATER ACIDIFICATION; CARBONIC-ACID; HIGH PCO(2); MARINE; IMPACTS; CALCIFICATION; TEMPERATURE; RESPONSES  
  Abstract Ocean Acidification (OA) can have pervasive effects in calcifying marine organisms, and a better understanding of how different populations respond at the physiological and evolutionary level could help to model the impacts of global change in marine ecosystems. Due to its natural geography and oceanographic processes, the Chilean coast provides a natural laboratory where benthic organisms are frequently exposed to diverse projected OA scenarios. The goal of this study was to assess whether a population of mollusks thriving in a more variable environment (Talcaruca) would present higher phenotypic plasticity in physiological and morphological traits in response to different pCO(2) when compared to a population of the same species from a more stable environment (Los Molles). To achieve this, two benthic limpets (Scurria zebrina and Scurria viridula) inhabiting these two contrasting localities were exposed to ocean acidification experimental conditions representing the current pCO(2) in the Chilean coast (500 mu atm) and the levels predicted for the year 2100 in upwelling zones (1500 (mu atm). Our results show that the responses to OA are species-specific, even in this related species. Interestingly, S. viridula showed better performance under OA than S. zebrina (i.e., similar sizes and carbonate content in individuals from both populations; lower effects of acidification on the growth rate combined with a reduction of metabolism at higher pCO2). Remarkably, these characteristics could explain this species' success in overstepping the biogeographical break in the area of Talcaruca, which S. zebrina cannot achieve. Besides, the results show that the habitat factor has a strong influence on some traits. For instance, individuals from Talcaruca presented a higher growth rate plasticity index and lower shell dissolution rates in acidified conditions than those from Los Molles. These results show that limpets from the variable environment tend to display higher plasticity, buffering the physiological effects of OA compared with limpets from the more stable environment. Taken together, these findings highlight the key role of geographic variation in phenotypic plasticity to determine the vulnerability of calcifying organisms to future scenarios of OA.  
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  Corporate Author Thesis  
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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2296-7745 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000651384500001 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1383  
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Author Lopez, D.; Leiva, A.M.; Arismendi, W.; Vidal, G. doi  openurl
  Title Influence of design and operational parameters on the pathogens reduction in constructed wetland under the climate change scenario Type
  Year 2019 Publication Reviews In Environmental Science And Bio-Technology Abbreviated Journal Rev. Environ. Sci. Bio-Technol.  
  Volume 18 Issue 1 Pages 101-125  
  Keywords Total and fecal coliform; Constructed wetlands; Climate change; Principal component analyses; Wastewater reuse  
  Abstract Under the climate change scenario, constructed wetlands (CWs) as an engineered system for treating domestic wastewater will face different challenges. Some of them are: (a) the increase of pathogens concentration in wastewater due to the rise of global temperature; (b) higher precipitation that can cause an increase of pathogens due to runoff; (c) the reuse of treated wastewater related to the water scarcity. These problems can affect the capacity of CWs for removal pathogens. In this context, the objective of this review is to provide an overview of the influence of design and operational parameters on pathogens reduction in CWs. To accomplish with this purpose, the published information (>30 studies) about the reduction of pathogens and the operational and design parameters in different CWs configurations and were gathered. With this data, statistical analyses were performed considering the most relevant variables which significantly influence the removal of pathogens in CWs. For this, principal component analyses (PCA) were achieved for determining, separately, the correlation of operational parameters with fecal coliform (FC) and total coliform (TC) removal. The results of PCA showed that FC and TC were correlated positively with mass removal rates of chemical oxygen demand (COD) and biological oxygen Demand (BOD5), total suspended solids (TSS) removal and the size of support medium. This study is the first approach that analyzes together the design and operational parameters which influence the pathogen removal in CWs. For this reason, these parameters and the increase on microorganism concentrations due to the climate change have to be considered for the future design of CWs.  
  Address [Lopez, D.; Leiva, A. M.; Arismendi, W.; Vidal, G.] Univ Concepcion, Environm Sci Fac, Engn & Environm Biotechnol Grp, Concepcion, Chile, Email: glvidal@udec.cl  
  Corporate Author Thesis  
  Publisher Springer Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1569-1705 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000459408200005 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 980  
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Author Mejia, H.F.G.; Toledo-Alarcon, J.; Rodriguez, B.; Cifuentes, J.R.; Porre, F.O.; Haeger, M.P.L.; Ovalle, N.V.; Astudillo, C.L.; Garcia, A. doi  openurl
  Title Direct recycling of discarded reverse osmosis membranes for domestic wastewater treatment with a focus on water reuse Type
  Year 2022 Publication Chemical Engineering Research & Design Abbreviated Journal Chem. Eng. Res. Des.  
  Volume 184 Issue Pages 473-487  
  Keywords Desalination; RO membranes; Discarded; Secondary wastewater; Water scarcity  
  Abstract The recycling of discarded membranes (end-of-life) represents a relevant alternative for sustainability of reverse osmosis (RO) desalination plants in the context of circular economy. This work evaluated the feasibility of using discarded commercial RO membranes in the treatment of domestic secondary wastewater to obtain water with a certain standard quality. Crossflow filtration tests were conducted to evaluate desalination and wastewater filtration performance at different operating pressures on RO membranes discarded from desalination plans at different working positions (primary M1; secondary M2). The standard manufacturer desalination tests showed a superior performance on M1 membranes, in terms of rejection (similar to 25 LMH, 97%), compared to M2 (similar to 33 LMH, 50%); both having a lower performance than a standard membrane (38 LMH +/- 15%; 99.6%). The failure is sufficient for discarding due to loss of lifespan. Moreover, in wastewater filtration tests using the secondary clarifier outlet effluent from a WWTP at different working pressures, both types of membranes were shown to be effective, with degrees of performance highly dependent on the working pressure. Thus, the operating values of permeate flux/salt rejection were between 56 and 59 LMH/ 96-97% for 600 psi: 33-34 LMH/ 94-96% for 300-psi and in the range of 10-11 LMH/ 90-94% for 80-psi test. Surface characterization of the membrane showed a pressure-related increase in fouling and bacterial adhesion post-filtration. Finally, the operating performance was verified in M1 wastewater filtration at 300 psi over long times (14 h), yielding stable and promising values (similar to 27 LMH; 96%). The permeate obtained has a low concentration of fecal coliforms (< 2 MPN/ 100 mL, 99.99% removal) and meets local standards for irrigation and drinking water in terms of conductivity, phosphorus and nitrogen concentration in treated water. (c) 2022 Institution of Chemical Engineers.  
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  Series Volume Series Issue Edition  
  ISSN 0263-8762 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000841163700005 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1635  
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Author Palmeiro-Sanchez, T.; Campos, J.L.; Mosquera-Corral, A. doi  openurl
  Title Bioconversion of Organic Pollutants in Fish-Canning Wastewater into Volatile Fatty Acids and Polyhydroxyalkanoate Type
  Year 2021 Publication International Journal of Environmental Research and Public Health Abbreviated Journal Int. J. Environ. Res. Public Health  
  Volume 18 Issue 19 Pages 10176  
  Keywords acidogenic fermentation; fish-canning wastewater; mixed culture; polyhydroxyalkanoates (PHAs); saline conditions; volatile fatty acids (VFAs)  
  Abstract The wastewater from the cookers of a tuna-canning plant was used as feedstock for the process. It was acidified in a continuous stirred tank reactor (CSTR) of 1.5 L to produce a mixture of volatile fatty acids (VFAs). The effluent contained 28.3 & PLUSMN; 8.7 g CODS/L and 25.0 & PLUSMN; 4.6 g CODVFA/L, 4.4 & PLUSMN; 1.6 g NH4+/L, and 10.9 & PLUSMN; 4.0 g Na+/L, which corresponds to about 28 g NaCl/L approximately. This was used to feed a PHA production system. The enriched MMC presented a capacity to accumulate PHAs from the fermented tuna wastewater. The maximum PHA content of the biomass in the fed-batch (8.35 wt% PHA) seemed very low, possibly due to the variable salinity (from 2.2 up to 12.3 g NaCl/L) and the presence of ammonium (which promoted the biomass growth). The batch assay showed a PHA accumulation of 5.70 wt% PHA, but this is a much better result if the productivity of the reactor is taken into account. The fed-batch reactor had a productivity of 10.3 mg PHA/(L h), while the batch value was about five times higher (55.4 mg PHA/(L h)). At the sight of the results, it can be seen that the acidification of fish-canning wastewater is possible even at high saline concentrations (27.7 g NaCl/L). On the other hand, the enrichment and accumulation results show us promising news and which direction has to be followed: PHAs can be obtained from challenging substrates, and the feeding mode during the accumulation stage has an important role to play when it comes to inhibition.  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1660-4601 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000709111100001 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1479  
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Author Pavissich, J.P.; Vargas, I.T.; Gonzalez, B.; Pasten, P.A.; Pizarro, G.E. pdf  doi
openurl 
  Title Culture dependent and independent analyses of bacterial communities involved in copper plumbing corrosion Type
  Year 2010 Publication Journal Of Applied Microbiology Abbreviated Journal J. Appl. Microbiol.  
  Volume 109 Issue 3 Pages 771-782  
  Keywords bacterial community; biofilm; copper plumbing; microbially influenced corrosion; water quality  
  Abstract Aims: This study used culture-dependent and culture-independent approaches to characterize bacterial communities in copper plumbing corrosion and to assess biofilm formation and copper resistance of heterotrophic bacteria isolated from copper pipes. Methods and Results: Water and copper pipes were collected from a cold-water household distribution system affected by 'blue water' corrosion and presenting biofilm formation. Corrosion-promoting ageing experiments were performed with conditioned unused copper pipes filled with unfiltered and filtered sampled water as nonsterile and sterile treatments, respectively. During 8 weeks, stagnant water within the pipes was replaced with aerated fresh water every 2 or 3 days. Total copper and pH were determined in sampled water, and copper pipe coupons were cut for microscopic analyses. Biofilms were extracted from field and laboratory pipes, and total DNA was isolated. Bacterial communities' composition was analysed by terminal restriction fragment length polymorphism (T-RFLP) and clonal libraries of 16S rRNA genes. Heterotrophic bacterial isolates were obtained from water and biofilm extracts and characterized in terms of biofilm formation capacity and copper minimum inhibitory concentration. The results indicated that copper concentration in stagnant water from nonsterile treatments was much higher than in sterile treatments and corrosion by-products structure in coupon surfaces was different. Multivariate analysis of T-RFLP profiles and clone sequencing showed significant dissimilarity between field and laboratory biofilm communities, and a low richness and the dominant presence of Gamma- and Betaproteobacteria in both cases. Several bacterial isolates formed biofilm and tolerated high copper concentrations. Conclusions: The study demonstrates microbially influenced corrosion (MIC) in copper plumbing. Gamma- and Betaproteobacteria dominated the corroded copper piping bacterial community, whose ability to form biofilms may be important for bacterial corrosion promotion and survival in MIC events. Significance and Impact of the Study: The characterization of micro-organisms that influence copper plumbing corrosion has significant implications for distribution system management and copper corrosion control.  
  Address [Pavissich, J. P.; Vargas, I. T.; Pasten, P. A.; Pizarro, G. E.] Pontificia Univ Catolica Chile, Dept Ingn Hidraul & Ambiental, Escuela Ingn, Santiago 6904411, Chile, Email: gpizarro@ing.puc.cl  
  Corporate Author Thesis  
  Publisher Wiley-Blackwell Publishing, Inc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1364-5072 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000280979700004 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 93  
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Author Pedrouso, A.; Tocco, G.; val del Rio, A.; Carucci, A.; Morales, N.; Campos, J.L.; Milia, S.; Mosquera-Corral, A. doi  openurl
  Title Digested blackwater treatment in a partial nitritation-anammox reactor under repeated starvation and reactivation periods Type
  Year 2020 Publication Journal Of Cleaner Production Abbreviated Journal J. Clean Prod.  
  Volume 244 Issue Pages 9 pp  
  Keywords Anammox; Blackwater; Decentralized systems; Nitritation; Starvation; Wastewater source separation  
  Abstract Wastewater source-separation and on-site treatment systems face severe problems in wastewater availability. Therefore, the effect of repeated short-term starvation and reactivation periods on a partial nitritation-anammox (PN/AMX) based processes were assessed treating digested blackwater at room temperature. Two sequencing batch reactors (SBR) were operated, one of them during 24 h/day the whole week (SBR-C, which served as control) and the other with repeated starvation/reactivation periods during the nights and the weekends (SBR-D), using simulated blackwater (300 mg N/L and 200 mg COD/L) as substrate. Results showed no remarkable differences in overall processes performance between both reactors, achieving total nitrogen removal efficiencies (NRE) around 90%. Furthermore, no significant variations were measured in specific activities, except for the aerobic heterotrophic one that was lower in SBR-D, presumably due to the exposure to anoxic conditions. Then, the technical feasibility of applying the PN/AMX system to treat real blackwater produced in an office building during working hours was successfully proved in a third reactor (SBR-R), with the same starvation/reactivation periods tested in SBR-D. Despite the low temperature, ranging from 14 to 21 degrees C, total NRE up to 95% and total nitrogen concentration in the effluent lower than 10 mg N/L were achieved. Moreover, the PN/AMX process performance was immediately recovered after a long starvation period of 15 days (simulating holidays). Results proved for the first time the feasibility and long-term stability (100 days) of applying the PN/AMX processes for the treatment (and potential reuse) of blackwater in a decentralized system where wastewater is not always available. (C) 2019 Elsevier Ltd. All rights reserved.  
  Address [Pedrouso, Alba; Val del Rio, Angeles; Mosquera-Corral, Anuska] Univ Santiago de Compostela, Dept Chem Engn, CRETUS Inst, E-15705 Santiago De Compostela, Spain, Email: alba.pedrouso@usc.es;  
  Corporate Author Thesis  
  Publisher Elsevier Sci Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0959-6526 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000503172600066 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 1079  
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Author Pina, S.; Sandoval, A.M.; Jara-Ulloa, P.; Contreras, D.; Hassan, N.; Coreno, O.; Salazar, R. doi  openurl
  Title Nanostructured electrochemical sensor applied to the electrocoagulation of arsenite in WWTP effluent Type
  Year 2022 Publication Chemosphere Abbreviated Journal Chemosphere  
  Volume 306 Issue Pages 135530  
  Keywords Arsenic elimination; Electrocoagulation; Electrochemical sensor; Wastewater treatment; Environmental pollutants  
  Abstract A sensitive electroanalytical method for the determination of arsenite, based on a heterostructure of aminated multiwalled carbon nanotubes and gold nanoparticles, was applied in an electrocoagulation (EC) treatment for the elimination of arsenite. A sensitive quantitative response was obtained in the determination of As3+ in a secondary effluent from a wastewater treatment plant from Santiago (Chile). The preconcentration stage was optimized through a Central Composite Face design, and the most sensitive peak current was obtained at 200 s and -600 mV of time and accumulation potential, respectively, after a differential pulse voltammetry sweep. Electroanalytical determination was possible in an interval between 42.89 and 170.00 mu g L-1 with a detection limit of 0.39 mu g L-1, obtaining recoveries over 99.1%. The developed method was successfully applied in an electrocoagulation treatment to remove 250 mu g L-1 of arsenite from a polluted effluent in a batch system. Complete arsenite removal was achieved using a steel EC system with a current density of 6.0 mA cm(-2) in less than 3 min of treatment.  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0045-6535 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000828037200004 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1624  
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Author Romero-Romero, J.L.; Inostroza-Blancheteau, C.; Orellana, D.; Aquea, F.; Reyes-Diaz, M.; Gil, P.M.; Matte, J.P.; Arce-Johnson, P. pdf  doi
openurl 
  Title Stomata regulation by tissue-specific expression of the Citrus sinensis MYB61 transcription factor improves water-use efficiency in Arabidopsis Type
  Year 2018 Publication Plant Physiology And Biochemistry Abbreviated Journal Plant Physiol. Biochem.  
  Volume 130 Issue Pages 54-60  
  Keywords Drought tolerance; Abiotic stress; Water use efficiency; Arabidopsis; Cisgenic; MYB61 transcription factor; Citrus  
  Abstract Water-use efficiency (WUE) is a quantitative measurement of biomass produced per volume of water transpired by a plant. WUE is an important physiological trait for drought response to mitigate the water deficiency. In this work, a cisgenic construction from Citrus sinensis was developed and its function in the improvement of WUE was evaluated in Arabidopsis. Sequences of the CsMYB61 coding region, a transcription factor implicated in the closure of stomata, together with a putative stomata-specific promoter from CsMYB.1.5, were identified and cloned. The protein encoded in the CsMYB61 locus harbors domains and motifs characteristic of MYB61 proteins. In addition, a 1.2 kb promoter region of the gene CsMYB15 (pCsMYB15) containing regulatory elements for expression in guard cells and in response to Abscisic Acid (ABA) and light was isolated. In Arabidopsis, pCsMYB15 directs the expression of the reporter gene GUS in stomata in the presence of light. In addition, transgenic lines expressing the CsMYB61 coding region under transcriptional control of pCsMYB15 have a normal phenotype under in vitro and greenhouse conditions. These transgenic lines exhibited a smaller opening of the stomata pore, lower stomatal conductance and respiration rate, enhanced sensitivity to exogenous ABA, and high drought stress tolerance. Our results indicate that stomata-specific expression of CsMYB61 enhances water use efficiency under drought conditions in Arabidospis.  
  Address [Romero-Romero, Jesus L.; Orellana, Daniela; Pablo Matte, Juan; Arce-Johnson, Patricio] Pontificia Univ Catolica Chile, Fac Ciencias Biol, Dept Genet Mol & Microbiol, Santiago, Chile, Email: parce@bio.puc.cl  
  Corporate Author Thesis  
  Publisher Elsevier France-Editions Scientifiques Medicales Elsevier Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0981-9428 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000444789200006 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 915  
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Author Santore, R.C.; Ryan, A.C.; Kroglund, F.; Rodriguez, P.H.; Stubblefield, W.A.; Cardwell, A.S.; Adams, W.J.; Nordheim, E. pdf  doi
openurl 
  Title Development and Application of a Biotic Ligand Model for Predicting the Chronic Toxicity of Dissolved and Precipitated Aluminum to Aquatic Organisms Type
  Year 2018 Publication Environmental Toxicology And Chemistry Abbreviated Journal Environ. Toxicol. Chem.  
  Volume 37 Issue 1 Pages 70-79  
  Keywords Aluminum; Biotic ligand model; Bioavailability; Chronic toxicity; Water quality criteria  
  Abstract Aluminum (Al) toxicity to aquatic organisms is strongly affected by water chemistry. Toxicity-modifying factors such as pH, dissolved organic carbon (DOC), hardness, and temperature have a large impact on the bioavailability and toxicity of Al to aquatic organisms. The importance of water chemistry on the bioavailability and toxicity of Al suggests that interactions between Al and chemical constituents in exposures to aquatic organisms can affect the form and reactivity of Al, thereby altering the extent to which it interacts with biological membranes. These types of interactions have previously been observed in the toxicity data for other metals, which have been well described by the biotic ligand model (BLM) framework. In BLM applications to other metals (including cadmium, cobalt, copper, lead, nickel, silver, and zinc), these interactions have focused on dissolved metal. A review of Al toxicity data shows that concentrations of Al that cause toxicity are frequently in excess of solubility limitations. Aluminum solubility is strongly pH dependent, with a solubility minimum near pH 6 and increasing at both lower and higher pH values. For the Al BLM, the mechanistic framework has been extended to consider toxicity resulting from a combination of dissolved and precipitated Al to recognize the solubility limitation. The resulting model can effectively predict toxicity to fish, invertebrates, and algae over a wide range of conditions. (C) 2017 SETAC  
  Address [Santore, Robert C.; Ryan, Adam C.] Windward Environm, Syracuse, NY 13202 USA, Email: RobertS@WindwardEnv.com  
  Corporate Author Thesis  
  Publisher Wiley Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0730-7268 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000418866400009 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 824  
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