Microplastic and Heavy Metals Distributions in Urban Rivers Sediments,China  

作　　者：SONG Dandan SHANG Yujun WANG Xiuli ZHUANG Yuwei GUO Hui BI Shuping HU Jianjun 

机构地区：[1]High and New Technology Research Center of Henan Academy of Sciences,Zhengzhou 450002,China [2]Henan Provincial Cartographic Institute,Zhengzhou 450008,China

出　　处：《Journal of Ocean University of China》2024年第4期1015-1025,共11页中国海洋大学学报（英文版）

基　　金：supported by the Key Research and Development Program (Scientific and Technological Project)of Henan Province (Nos.212102310080,222102320294,and 232102231062);the Fundamental Research Funds for the Central Universities (No.220602024);the Major Focus Project of Henan Academy of Sciences (No.220102002)。

摘　　要：This study investigated the distribution of microplastics and heavy metals,along with the interaction between the two in the sediments of urban rivers in China.Results showed that the abundance of microplastics ranged from 2412±187.5 to 7638±1312items kg^(-1)dry sediment across different survey stations,with an average abundance at(4388±713)items kg^(-1)dry sediment.Upon further categorization,it was found that transparent fragments were the primary color and type of microplastics present.The potential ecological risk index(RI)of heavy metals in sediments suggested a low level of ecological risk within a majority of the urban rivers studied.Cd was identified as the main potential ecological risk factor in the sediments of the studied areas.There was a relatively good significant linear relationship between the RI of heavy metals and the abundance of microplastics,bolstering the linkage between these two environmental pollutants.However,the concentrations of heavy metals in microplastics were not dependent on their corresponding contents in sediments.In fact,the concentration of Cu,Cd,and As in microplastics were higher than those in the sediments.This finding confirmed that microplastics could serve as carriers of heavy metals and introduce potential risks to aquatic wildlife and human through the food chain.

关 键 词：microplastic heavy metals risk assessment river sediments 

分 类 号：X522[环境科学与工程—环境工程]