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Author (up) del Rio, A.V.; da Silva, T.; Martins, T.H.; Foresti, E.; Campos, J.L.; Mendez, R.; Mosquera-Corral, A. pdf  doi
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  Title Partial Nitritation-Anammox Granules: Short-Term Inhibitory Effects of Seven Metals on Anammox Activity Type
  Year 2017 Publication Water Air And Soil Pollution Abbreviated Journal Water Air Soil Pollut.  
  Volume 228 Issue 11 Pages 9 pp  
  Keywords Ammonia oxidizing bacteria; Anammox; Granules; IC50; Nitrogen removal  
  Abstract The inhibitory effect of seven different metals on the specific anammox activity of granular biomass, collected from a single stage partial nitritation/anammox reactor, was evaluated. The concentration of each metal that led to a 50% inhibition concentration (IC50) was 19.3 mg Cu+2/L, 26.9 mg Cr+2/L, 45.6 mg Pb+2/L, 59.1 mg Zn+2/L, 69.2 mg Ni+2/L, 174.6 mg Cd+2/L, and 175.8 mg Mn+2/L. In experiments performed with granules mechanically disintegrated (flocculent-like sludge), the IC50 for Cd+2 corresponded to a concentration of 93.1 mg Cd+2/L. These results indicate that the granular structure might act as a physical barrier to protect anammox bacteria from toxics. Furthermore, the presence of an external layer of ammonia oxidizing bacteria seems to mitigate the inhibitory effect of the metals, as the values of IC50 obtained in this study for anammox activity were higher than those previously reported for anammox granules. Additionally, the results obtained confirmed that copper is one of the most inhibitory metals for anammox activity and revealed that chromium, scarcely studied yet, has a similar potential inhibitory effect.  
  Address [del Rio, Angeles Val; Mendez, Ramon; Mosquera-Corral, Anuska] Univ Santiago de Compostela, Inst Technol, Dept Chem Engn, E-15782 Santiago De Compostela, Spain, Email: mangeles.val@usc.es  
  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 0049-6979 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000415958200002 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 790  
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Author (up) Menares, F.; Carrasco, M.A.; Gonzalez, B.; Fuentes, I.; Casanova, M. pdf  doi
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  Title Phytostabilization Ability of Baccharis linearis and Its Relation to Properties of a Tailings-Derived Technosol Type
  Year 2017 Publication Water Air And Soil Pollution Abbreviated Journal Water Air Soil Pollut.  
  Volume 228 Issue 5 Pages 17 pp  
  Keywords Arbuscular mycorrhizal fungi; Baccharis linearis; Plant-substrate interaction; Tailings properties  
  Abstract Spontaneous colonization of mine tailing dams by plants is a potential tool for phytostabilization of such reservoirs. However, the physical and chemical properties of each mine tailings deposit determine the success of natural plant establishment. The plant Baccharis linearis is the main native nanophanerophyte species (evergreen sclerophyllous shrub) that naturally colonizes abandoned copper tailings dams in arid to semiarid north-central Chile. This study compare growth of B. linearis against the physical and chemical properties of a Technosol derived from copper mine tailings. Five sites inside the deposit were selected based on B. linearis vegetation density (VD), at two soil sampling depths under the canopy of adult individuals. Physical and chemical properties of tailings samples and nutrient concentrations in tailings and plants were each determined. Some morphological features of the plants (roots and aerial parts) were also quantified. There were significant differences in soil available water capacity (AW) and relative density (Rd) at different VD. Sites with low AW and high Rd had lower nutrient concentrations and higher Zn content in tailings, decreased infection by arbuscular mycorrhizal fungi, and increased fine root abundance and root hair length in individual plants. In contrast, higher AW, which was positively correlated with fine particles and organic matter content, had a positive effect on vegetation coverage, increased N and P contents in tailings, and increased N contents in leaf tissues, even when available N and P levels in tailings were low. Multiple constraints, such as low AW, N, P, and B contents and high Zn concentrations in the tailings restricted vegetation coverage, but no phenotypic differences were observed between individuals. Thus, in order to promote dense coverage by B. linearis, water retention in these tailings must be improved by increasing colloidal particles (organic and/or inorganic) contents, which have a positive effect on colonization by this species.  
  Address [Menares, Felipe; Carrasco, Maria A.; Fuentes, Ignacio; Casanova, Manuel] Univ Chile, Fac Ciencias Agron, Dept Ingn & Suelos, Santiago, Chile, Email: mcasanov@uchile.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 0049-6979 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000401070100008 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 732  
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