Enhanced sequestration of molybdenum(VI) using composite constructed wetlands and responses of microbial communities
Enhanced sequestration of molybdenum(VI) using composite constructed wetlands and responses of microbial communities
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利用复合人工湿地增强钼（VI）封存和微生物群落的反应
DOI：
10.2166/wst.2022.035
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发表时间：
2022-02-02
影响因子：
2.7
通讯作者：
Hui, A. Y.
中科院分区：
文献类型：
--
作者：
Chen, B.;Zhou, F. J.;Hui, A. Y.
矿区钼（Mo）非点源污染对周边水土生态系统产生了不可逆转的影响。在此基础上，构建了3个垂直潜流人工湿地（CWs），以评估基质与植物组合对Mo（VI）的去除效果。结果表明，与香蒲复合的CW1对Mo（VI）的去除率为80.90%。Mo（VI）在复合基质中的残留量最大（58.13 ~ 88.04%），其中Mo（VI）残留量最大的是复合基质表面的水溶性部分。Mo（VI）的去除还受基质中微生物群落组成，特别是它们的共生网络的影响。与Mo（VI）去除率显著正相关的种有plantomycetes、Latescibacteria、Armatimonadetes和Gemmatimonadetes。此外，添加CWs的植物显示出更多的类群间共现交互作用，这意味着湿地有效地选择性招募潜在的微生物群落并改变共现以去除基质中的污染。这些结果可能有助于为废水中Mo（VI）的处理提供基于生态学的解决方案，特别是在基因水平上调节微生物群落以去除Mo（VI）。
The molybdenum (Mo) non-point source pollution in the mining area has an irreversible impact on the surrounding water and soil ecosystems. Herein, three integrated vertical subsurface flow constructed wetlands (CWs) were constructed to assess the effects of combination substrates and plant on the removal of Mo(VI). Results showed that CW1 with combination substrates and cattail exhibited a favorable removal performance for Mo(VI) at 80.90%. Moreover, most Mo(VI) retained in there CWs was retained in the substrate (58.13-88.04%), and the largest fraction of Mo(VI) retained was the water-soluble fraction on the surface of the combination substrates. Mo(VI) removal was also influenced by the microbial community composition in substrate, especially their co-occurrence networks. The species that showed significant positive correlation with Mo(VI) removal were Planctomycetes, Latescibacteria, Armatimonadetes, and Gemmatimonadetes. Moreover, CWs added plants showed more co-occurrences interaction between taxa occurs, which mean that the wetlands efficiently selective recruitment of potential microbial consortia and change the co-occurrences to remove pollution in the substrate. These results could be useful in providing an ecology-based solution for the treatment of Mo(VI) in wastewater, especially in adjusting the microbial communities for Mo(VI) removal at the genetic level.