The effect of microplastics on behaviors of chiral imidazolinone herbicides in the aquatic environment: Residue, degradation and distribution
The effect of microplastics on behaviors of chiral imidazolinone herbicides in the aquatic environment: Residue, degradation and distribution
复制标题
微塑料对水生环境中手性咪唑啉酮除草剂行为的影响：残留、降解和分布
DOI：
10.1016/j.jhazmat.2021.126176
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发表时间：
2021
影响因子：
13.6
通讯作者：
Tan Huihua
中科院分区：
文献类型：
--
作者：
Hu Mingfeng;Hou Ning;Li Yuanfu;Liu Yanmei;Zhang Hui;Zeng Dongqiang;Tan Huihua
微塑料和除草剂对水环境的污染已成为全球关注的问题。本研究的重点是甲氧咪草烟，甲咪唑烟酸，和咪唑乙烟酸吸附聚丙烯微塑料在水中。研究了微塑料对除草剂对映体在水体、沉积物和水-沉积物微宇宙中降解和分布的潜在影响。吸附实验结果表明，微塑料对除草剂的吸附既有化学吸附，也有物理吸附。降解实验结果表明，微塑料能显著提高除草剂在水体和沉积物中的持留性。3种除草剂在水体和沉积物中均未发现明显的立体选择性降解，但甲咪唑烟酸在含有微塑料的水体中存在立体选择性降解，微塑料对甲咪唑烟酸在水体和沉积物微宇宙中的立体选择性降解和分布有显著影响。在水-沉积物体系中对咪草啶酸和咪草烟的立体选择性行为影响不大。此外，微宇宙实验结果还表明，除草剂可以在水和微塑料之间进行分配，微塑料可以影响除草剂在水环境中的持久性和分布。本研究为了解手性污染物在含有微塑料的水环境中的归宿提供了新的见解，有助于理解除草剂和微塑料在水环境中的行为。
The pollution of aquatic environments by microplastics and herbicides has become a global concern. This study was focused on imazamox, imazapic, and imazethapyr sorption to polypropylene microplastics in water. And the potential effects of microplastics on herbicide enantiomer degradation and distributions in water, sediment, and water–sediment microcosms were investigated. Adsorption experiment results indicated that herbicide sorption to microplastics involved both chemisorption and physical adsorption. Degradation experiment results indicated that microplastics could markedly increase herbicide persistence in water and sediment. Marked stereoselective degradation was not found for the three herbicides in water and sediment, but stereoselective degradation of imazapic in water containing microplastics was found. The water–sediment microcosms experiment results indicated that microplastics have significant effect on stereoselectivity degradation and distribution in water and water-sediment microcosms for imazapic, and have little effect on stereoselectivity behaviors of imazamox and imazethapyr in water-sediment systems. Furthermore, the microcosm experiment results also indicated that herbicides can partition between water and microplastics and that microplastics could affect herbicide persistence and distributions in aquatic environments. The present study provides new insights into the fate of chiral pollutants in aquatic environments containing microplastics, and contributes to understanding behaviors of herbicides and microplastics in aquatic environments.