Speciation of nickel and zinc, its short-term inhibitory effect on anammox, and the associated microbial community composition
| Autor: | Kozet Yapsakli, Ayse Ekin Uzunhasanoglu, Cigdem Kalkan Aktan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Environmental Engineering media_common.quotation_subject Population chemistry.chemical_element Bioengineering Fractionation Zinc 010501 environmental sciences 01 natural sciences 03 medical and health sciences Bioreactors Nickel Anaerobiosis education Waste Management and Disposal 0105 earth and related environmental sciences media_common education.field_of_study biology Bacteria Renewable Energy Sustainability and the Environment Chemistry Planctomycetes General Medicine biology.organism_classification Speciation 030104 developmental biology Microbial population biology Anammox Environmental chemistry Composition (visual arts) Oxidation-Reduction |
| Zdroj: | Bioresource technology. 268 |
| ISSN: | 1873-2976 |
| Popis: | This study provides insight into the short-term effects of nickel and zinc on anammox. The impacts of these heavy metals are evaluated based on their potentially bioavailable fractions, including the intracellular, surface-bound, soluble, free-ion, and weak (labile) complexes of heavy metals, in the presence of certain inorganic/organic species. Results showed that the IC50 values for soluble, intracellular, cell-associated, surface-bound, and free-ion Ni concentrations are 5.99, 0.250, 0.930, 0.680, and 1.36 mg/L, respectively. The inhibitory effect of Zn is found to be lower with respect to Ni, with IC50 values of 6.76, 11.9, 15.1, and 2.71 mg/L for the soluble, intracellular, cell-associated, and free-ion Zn concentrations, respectively. This is the first detailed evaluation of anammox inhibition based on the fractionation of heavy metals. Metagenomic analysis reveals that Candidatus Kuenenia constitute approximately 89% of the entire Planctomycetes population, whereas Candidatus Brocadia are detected in relatively low fractions (3%). |
| Databáze: | OpenAIRE |
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