Estimation of the accumulation rates and health risks of heavy metals in residential soils of three metropolitan cities in China  

作　　者：Chi Peng Kai Zhang Meie Wang Xinxing Wan Weiping Chen 

机构地区：[1]Institute of Environmental Engineering,School of Metallurgy and Environment,Central South University,Changsha 410083,China [2]State key laboratory of urban and regional ecology,Research center for eco-environmental sciences,Chinese academy of sciences,Beijing 100085,China [3]Third Xiangya Hospital,Central South University,Changsha 410013,China

出　　处：《Journal of Environmental Sciences》2022年第5期149-161,共13页环境科学学报（英文版）

基　　金：We acknowledge the financial support provided by the National Natural Science Foundation of China(No.41771532).

摘　　要：Heavy metal concentrations in urban soils are likely to increase over time because of contin-uous urbanization and heavy metal emissions.To estimate the accumulation rates of heavy metals in urban soils,we collected soil samples from residential areas with different build-ing ages in the metropolitan cities of Shanghai,Shenzhen,and Beijing,China.Heavy metal concentrations in the soils varied among the cities and were primarily affected by soil parent material and the intensity of anthropogenic sources.Regression analyses revealed that the accumulation rates of Cd and Cu in the soils ranged from 0.0034 to 0.0039 mg/(kg·year)and 0.343 to 0.391 mg/(kg·year),respectively,and were similar across the three cities,while ac-cumulation rates of Zn and Pb in Shanghai were higher than those in Shenzhen and Beijing.The higher accumulation rates of Zn and Pb in Shanghai can be explained by differences in city history and industrial structures among the cities.Residential soils with high health risks posed by the heavy metals were mostly collected from old towns of Shanghai because of high Pb content in the areas.Although recent urbanization resulted in elevated concen-trations of Cd,Cu,Zn,and Pb in the residential soils,the effect on the total health risks of residents exposed to the soils was negligible.

关 键 词：URBANIZATION Urban soil Health risk assessment Building age Regression model Source analysis 

分 类 号：X53[环境科学与工程—环境工程] X820.4