Assessing the impacts of fine sediment removal on endogenous pollution release and microbial community structure in the shallow lakes
文献类型： 外文期刊
作者： Yu, Ying 1 ; Yu, Zengliang 1 ; Jiang, Jingang 1 ; Wu, Lifang 1 ; Feng, Huiyun 1 ;
作者机构： 1.Chinese Acad Sci, Inst Intelligent Machines, Hefei Inst Phys Sci, Hefei 230031, Peoples R China
2.Anhui Acad Agr Sci, Inst Soil & Fertilizer, Key Lab Nutrient Cycling Resources & Environm Anhu, Hefei 230001, Peoples R China
关键词： Fine particle sediment; Resuspension; Endogenous pollution; Overlying water; Microbial community
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）
ISSN： 0048-9697
年卷期： 2023 年 897 卷
页码：
收录情况： SCI
摘要： Resuspension is a crucial process for releasing endogenous pollution from shallow lakes into the overlying water. Fine particle sediment, which has a higher contamination risk and longer residence time, is the primary target for control-ling endogenous pollution. To this end, a study coupling aqueous biogeochemistry, electrochemistry, and DNA se-quencing was conducted to investigate the remediation effect and microbial mechanism of sediment elution in shallow eutrophic water. The results indicated that sediment elution can effectively remove some fine particles in situ. Furthermore, sediment elution can inhibit the release of ammonium nitrogen and total dissolved phosphorous into the overlying water from sediment resuspension in the early stage, resulting in reductions of 41.44 %-50.45 % and 67.81 %-72.41 %, respectively. Additionally, sediment elution greatly decreased the concentration of nitrogen and phosphorus pollutants in pore water. The microbial community structure was also substantially altered, with an increase in the relative abundance of aerobic and facultative aerobic microorganisms. Redundancy analysis, PICRUSt function prediction, and the correlation analysis revealed that loss on ignition was the primary factor responsible for driving changes in microbial community structure and function in sediment. Overall, the findings provide novel in-sights into treating endogenous pollution in shallow eutrophication water.
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