Mechanism of Cr(VI) reduction by Lysinibacillus sp. HST-98, a newly isolated Cr (VI)-reducing strain
| Autor: | Guangyang Jiang, Jia Chen, Zhe Xu, Xiaoguang Li, Ruoshi Zhang, Yongqiang Tian, Longzhan Gan |
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| Rok vydání: | 2021 |
| Předmět: |
Chromium
chemistry.chemical_classification Lysinibacillus Strain (chemistry) Health Toxicology and Mutagenesis Metal ions in aqueous solution Temperature chemistry.chemical_element Electron donor General Medicine Metabolism Pollution chemistry.chemical_compound Biodegradation Environmental Enzyme chemistry Environmental Chemistry Hexavalent chromium Bacillaceae Oxidation-Reduction Nuclear chemistry |
| Zdroj: | Environmental Science and Pollution Research. 28:66121-66132 |
| ISSN: | 1614-7499 0944-1344 |
| DOI: | 10.1007/s11356-021-15424-x |
| Popis: | Facing the increasingly severe Cr(VI) pollution, bioreduction has proved to be an eco-friendly remediation method. An isolated strain identified as Lysinibacillus can relatively reduce Cr(VI) well. Even if the concentration of Cr(VI) increased to 250mg/L, the strain HST-98 could also grow and remove Cr(VI) well. After optimization of reaction conditions, the optimal pH, temperature, and electron donor are 8~9, 36°C, and sodium lactate, respectively. Coexisting metal ions such as Cu2+, Co2+, and Mn2+ are beneficial to reduce Cr(VI), while Zn2+, Ni2+, and Cd2+ are just the opposite. What is more, the mechanism of the reduction by the strain HST-98 is chiefly mediated by intracellular enzymes. After gene sequence homology blast and analysis, the genes and enzymes related to chromium metabolism in strain HST-98 have been annotated, which helps us to further understand the reduction mechanism of the strain HST-98. In general, Lysinibacillus sp. HST-98 is a potential candidate to repair the Cr(VI)-contaminated sites. |
| Databáze: | OpenAIRE |
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