The occurrence of microplastics in water bodies in urban agglomerations: Impacts of drainage system overflow in wet weather, catchment land-uses, and environmental management practices
The occurrence of microplastics in water bodies in urban agglomerations: Impacts of drainage system overflow in wet weather, catchment land-uses, and environmental management practices
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DOI：
10.1016/j.watres.2020.116073
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发表时间：
2020-09-15
期刊：
影响因子：
12.8
通讯作者：
Ye, Jianfeng
中科院分区：
文献类型：
--
作者：
Chen, Hao;Jia, Qilong;Ye, Jianfeng
城市群水体中的微塑料足迹主要由叠加的人为影响所主导。了解这些影响以及它们之间的相互关系对于更好地了解微塑料在不同生态系统中的发生和变化至关重要。本研究以上海特大城市群为研究对象，纵向研究了流域尺度城市群水体中微塑料的丰度和分布特征。特别是，微塑料的行为与排水系统溢出的影响，在潮湿的天气（世界自然基金会），土地利用和环境管理实践进行了探讨。WWF可以大大加剧水生环境中的微塑料污染。基于详细数据的系统估计表明，通过WWF排放到流域地区的微塑料年负荷为8.50 x 10（14）p/年，约为当地污水处理厂排放量的六倍。研究结果有助于研究水生微塑料的空间变异性及其受土地利用影响的程度。按降序排列，微塑料浓度最高的是重工业区>商业/公共/娱乐区>农业/轻工业区>农业区>和居民区。在水体中观察到的微塑料的纵向模式表明，有土地利用和水动力学的叠加效应。本文首次提供了一个综合框架，展示了环境管理实践在控制城市规模的微塑料生产和向接收沃茨传输方面的重要作用。改善世界自然基金会的管理可能是一个切实的解决方案，有助于立即大规模减少污水中的微塑料。确定不同天气或水文条件下的优化管理实践可能是降低微塑料浓度并改变其在特定区域流动路径模式的重要因素。(C)2020爱思唯尔有限公司版权所有。
The footprints of microplastics in the water bodies of urban agglomerations are largely dominated by superimposed anthropogenic influences. Understanding these influences and how they are correlated is essential to better understand the occurrence and variability of microplastics in different ecosystems. This study longitudinally assessed the abundance and distribution of microplastics in the water bodies of urban agglomerations at the watershed-scale in Shanghai Megacity. Particularly, the behavior of microplastics with the impacts of drainage system overflow in wet weather (WWF), land uses, and environmental management practices were explored. WWF can greatly aggravate microplastic pollution in aquatic environments. A systemic estimation based on detailed data was used to show that the annual load of microplastics discharged via WWF in the watershed area was 8.50 x 10(14) p/year, which was approximately six times larger than that discharged via the local Wastewater Treatment Plant effluent. Findings here contribute to research concerning the spatial variability of aquatic microplastics and the extent to which they are affected by land use. In descending order, the highest microplastic concentrations were found in heavy industrial > commercial/public/recreational > agricultural/light industrial > agricultural > and residential areas. The longitudinal pattern of microplastics observed in the water bodies suggested that there were superimposed effects of land use and hydrodynamics. This paper is the first to provide an integrated framework that demonstrates the significant role of environmental management practices in controlling the production and transmission of microplastics to receiving waters at a city-scale. Improved management of WWF might be a tangible solution that would help achieve an immediate and large-scale reduction of microplastics in sewage. Determining the optimized management practices for different weather or hydrological conditions could be an essential factor in decreasing microplastic concentrations and altering their flow-path pattern in a given region. (C) 2020 Elsevier Ltd. All rights reserved.