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Microplastic Reorganization in Urban River Before and After Rainfall by Yiting Wei; Peng Dou; Dongyu Xu; Yanliang Zhang; Bo Gao is a Environmental Science article available to read on EtoBox.

What is Microplastic Reorganization in Urban River Before and After Rainfall about?

Microplastics (MPs) present in non-negligible amounts in urban environments, where urban rivers serve as important transport channels for MPs. However, the footprint of MPs in urban rivers under the influence of natural and anthropogenic factors is poorly understood. This study investigated the MPs organization, stability and pollution risk before and after rainfall in the Qing River, Beijing. Rainfall potentially diluted the MPs abundance, attributed to opening of barrages and increase of flow velocity. The proportion of small-sized MPs (SMPs, 48-300 μm) decreased slightly, whereas that of normal-sized MPs (NMPs, 300-1000 μm) and large-sized MPs (LMPs, > 1000 μm) increased. However, SMPs dominantly presented in the Qing River before and after rainfall. Polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), and polystyrene (PS) were main polymers observed in the Qing River. The proportions of PET and PS decreased, while PP and PE increased after rainfall. The main types of MPs introduced by stormwater were PP and PE. The elevated MP diversity integrated index after rain suggested that rainfall enriched the local sources of MPs. Rainfall reduced the stability and f

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Author

Yiting Wei; Peng Dou; Dongyu Xu; Yanliang Zhang; Bo Gao

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Environmental Science (Physical Sciences)