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Changes of atrazine dissipation and microbial community under coexistence of graphene oxide in river water

文献类型： 外文期刊

作者： Wang, Qinghai 1 ; Peng, Lei 1 ; Wang, Peixin 1 ; Zhou, Zixin 1 ; Li, Cui 1 ; Chen, Chuansheng 2 ; Wang, Yu 3 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Grassland Flowers & Ecol, Beijing 100097, Peoples R China

2.Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China

3.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China

关键词： Pesticide pollution; Graphene oxide; Microbial diversity; Atrazine fate; Aquatic ecosystems

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）

ISSN： 0304-3894

年卷期： 2024 年 462 卷

页码：

收录情况： SCI

摘要： The coexistence of herbicide atrazine (ATZ) and the nanomaterial graphene oxide (GO) in natural water bodies will be an inevitable scenario due to their widespread application and consequent release into aquatic ecosystems. But the dissipation of ATZ with GO and the response of the microbial community to their combination are still not clear. Here, we investigated the dissipation dynamics and transformation of ATZ with and without GO in river water after 21-d incubation. In the presence of GO, ATZ residue significantly decreased by 11%-43%; the transformation of ATZ markedly increased by 11%-17% when ATZ concentrations were not above 1.0 mg center dot L-1. The direct adsorption of ATZ on GO, mainly via 7C-7C interactions, proton transfer and hydrogen bonding, contributed 54%-68% of the total increased ATZ dissipation by GO. ATZ and ATZ+GO exerted effects of similar magnitude on microbial OTU numbers with an increase of bacterial diversity. The coexisting GO increased the relative abundance of ATZ-degradation bacteria and Chitinophagales, thus improving ATZ transformation. This work indicated that the coexistence of GO at environmentally relevant concentrations can effectively reduce ATZ residues and promote the transformation of ATZ to degradation products in river water; nevertheless, the potential risk of GO acting as an ATZ carrier should be given more prominence.

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