黄铁矿
六价铬
磁铁矿
钝化
铬
化学
矿物
环境化学
环境污染
微生物
金属
冶金
矿物学
细菌
材料科学
图层(电子)
环境科学
地质学
环境保护
古生物学
有机化学
作者
Jinglei Zhu,Lei Pan,Mengfei Liu,Peng He,Yaozong Chen,Min Gan,Jianyu Zhu
出处
期刊:Minerals
[MDPI AG]
日期:2022-04-09
卷期号:12 (4): 460-460
被引量:1
摘要
Widespread hexavalent chromium (Cr (VI)) in the environment has become a worldwide problem, and economical and efficient treatment is urgently needed. In this paper, the treatment method of Cr (VI) by microorganisms and iron minerals (pyrite and magnetite) under anaerobic conditions was investigated. Furthermore, the influence of Cr (VI) on the microbial community structure was explored. The reduction test demonstrated that the removal rate of Cr (VI) in a single biological group was 54.96%; however, in the pyrite and biological groups and magnetite and biological groups, the removal rates of Cr (VI) increased to 83.06% and 78.23%, respectively. Microorganisms and iron minerals work together to produce a better removal effect on the removal rate of Cr (VI). Mechanistic studies have found that in the process of Cr (VI) reduction, a passivation layer is formed on the surface of the mineral that hinders the progress of the reaction. The addition of bacteria can reduce the negative impact of the passivation layer. At the same time, iron minerals have better electron-receiving and -conducting ability and can be used as electron carriers for bacteria to reduce Cr (VI). In addition, iron minerals and the disappearance of Cr (VI) will change the structure of the community and affect the expression of its functions, which is more conducive to reducing Cr (VI). This work sheds new light on the treatment of heavy metal pollution and the understanding of the synergistic reduction mechanism of Cr (VI).
科研通智能强力驱动
Strongly Powered by AbleSci AI