Distribution of atrazine and its phytoremediation by submerged macrophytes in lake sediments

文献类型: 外文期刊

第一作者: Qu, Mengjie

作者: Qu, Mengjie;Li, Huidong;Li, Na;Liu, Guanglong;Zhao, Jianwei;Hua, Yumei;Zhu, Duanwei;Li, Huidong

作者机构:

关键词: Atrazine;Sediment;Distribution;Submerged macrophytes;Phytoremediation

期刊名称:CHEMOSPHERE ( 影响因子:7.086; 五年影响因子:6.956 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: We investigated sediments with high atrazine accumulation capability from 6 eutrophic lakes in Hubei Province of central China. Almost all lakes have atrazine in their sediments because of human activities. Honghu Lake and Liangzihu Lake were found to have higher levels of atrazine in sediment: 0.171 and 0.114 mg kg(-1), respectively. The results showed that lake sediments could adsorb atrazine six times faster than soils. The equilibrium partition coefficient of atrazine desorption (K-pd) is much larger than the adsorption equilibrium partition coefficient (K-pa) of atrazine, indicating that the residue of atrazine in water is easily immobilized by the sediments. Meanwhile, the incubation experiment showed that the removal rateof atrazine in Potamogeton crispus-planted and Myriophyllum spicatum-planted sediments reached > 90%, while the rate in unplanted sediments was 77.2 +/- 2.12% over 45 d. In unplanted sediment, the half-life of atrazine dissipation was 14.30 d, which was strongly enhanced by P. crispus and M. spicatum, greatly reducing the half-life to 8.60 and 9.72 d, respectively. These two submerged macrophytes are considered to be potential tools in the remediation of atrazine-contaminated sediments. (C) 2016 Elsevier Ltd. All rights reserved.

分类号: X5

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