[Distribution, Risk, and Influencing Factors of Microplastics in Surface Water of Huangshui River Basin].

Meng-Yuan Fan, Yi-Mei Huang, Hai-Xin Zhang, Hao-Hao Li, Qian Huang
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引用次数: 1

Abstract

In order to explore the distribution of microplastics in the freshwater environment of Qinghai-Tibet Plateau, 63 surface water samples were collected in Huangshui River basin of Qinghai province during the wet season, and the distribution characteristics and main influencing factors of microplastics in the surface water were analyzed by means of metallographic microscope, Fourier infrared spectroscopy, field investigation, and image data analysis. The potential ecological risks of microplastics were evaluated using risk index (H) and pollution load index (PLI) models. The abundance of microplastics in surface water ranged from 665-8780 n·m-3, with the highest average abundance of 5414 n·m-3 in Huangyuan County. The abundance of microplastics increased from upstream to downstream. The main colors of microplastics were transparent (67%) and black (17%), and the particle size was less than 50 μm (70%). Polyethylene (66%) and polypropylene (12%) were the main polymer types. The abundance of microplastics was positively correlated with cultivated land area, precipitation, and ultraviolet intensity, but the opposite results were observed in dissolved oxygen, redox potential, and wind speed. Additionally, the potential ecological risk of surface water in the Huangshui River basin was relatively low.

[湟水河流域地表水微塑料分布、风险及影响因素]。
为探讨青藏高原淡水环境中微塑料的分布,在青海省湟水河流域湿季采集了63份地表水样品,通过金相显微镜、傅里叶红外光谱、实地调查和图像数据分析等手段,分析了地表水中微塑料的分布特征及主要影响因素。采用风险指数(H)和污染负荷指数(PLI)模型对微塑料潜在生态风险进行了评价。地表水微塑料丰度在665 ~ 8780 n·m-3之间,其中黄源县平均丰度最高,为5414 n·m-3。微塑料的丰度从上游到下游逐渐增加。微塑料的主要颜色为透明(67%)和黑色(17%),粒径小于50 μm(70%)。聚乙烯(66%)和聚丙烯(12%)是主要的聚合物类型。微塑料丰度与耕地面积、降水和紫外线强度呈正相关,而与溶解氧、氧化还原电位和风速呈正相关。黄水河流域地表水潜在生态风险较低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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