无定河上游流域水体微塑料污染现状与分布特征

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Abstract In this study, We investigated the abundance and distribution of microplastics in the upper main stream of the Wuding River, a first-order tributary of the Yellow River, and the tributaries of the Nalin River, the Hailiu Rabbit River, the Yuxi River and the Lu River. The results showed that:The average abundance of microplastics in the water bodies of the upper Wuding River Basin was 15.58n/L, ranging from 2.5 to 35.63n/L. Microplastic types were abundant, with the percentages of PEG (62.96%), PE (6.17%), PPS (3.09%), 4-vinylbiphenyl (2.78%), PCTG (2.47%), PS (2.16%), PTFE (2.16%), PPSU (1.85%), PMMA (1.54%), others (14.81%). More than 96% of the microplastics were less than 1mm, which was very easy to enter the enrichment of organisms. The shape is dominated by fragments, followed by films and granules; most of them were transparent or brown, and other colors accounted for about 25%. Based on the source-specific classification system of microplastics, it was initially determined that microplastics mainly originated from agricultural mulch film and personal toiletries. The results indicate that the overall risk of microplastics in water bodies in the upper watershed of the Wuding River was at a mild pollution level. The abuse of toxic and harmful plastics was of particular concern. The study of microplastics in the upper Wuding River basin, which is located in the windy beach area in the southeastern part of the Mawusu Desert, on the one hand reveals the current status and potential pollution risk of microplastics in the windy beach area; on the other hand, it provides a typical case of scientific understanding of the impact of urban development and agricultural production on the water environment in the desert area from the perspective of microplastics.

Key words： Wuding River wind-blown sand beach water microplastics risk assessment

Received: 20 March 2023

PACS:

X522

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	Articles by authors
	WANG Yu-dan
	GUI Wei-zhen
	SHAO Tian-jie
	ZHU Ya-di
	WANG Yan-hua
	WANG Rui-yuan
	LI Dong-ze

Cite this article:

WANG Yu-dan,GUI Wei-zhen,SHAO Tian-jie等. Water microplastics pollution and distribution characteristics in the upper Wuding River Basin[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(10): 5583-5590.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I10/5583

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