Comprehensive risk assessment of key supervision units of soil pollution in Yangtze River Delta

JU Tie-nan; LEI Mei; GUO Guang-hui; XU Yuan; LOU Qi-jia; ZHANG Yang; ZHANG Jin-long

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China Environmental Science ›› 2023, Vol. 43 ›› Issue (12) : 6490-6499.

Soil Pollution Control

Comprehensive risk assessment of key supervision units of soil pollution in Yangtze River Delta

JU Tie-nan^1,2, LEI Mei^1,2, GUO Guang-hui^1,2, XU Yuan^1,2, LOU Qi-jia^1,2, ZHANG Yang^1,2, ZHANG Jin-long^1,2

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Abstract

To evaluate the comprehensive risk of key regulatory units of soil pollution in the Yangtze River Delta, based on the risk assessment concept of "source pathway receptor", this paper innovatively integrated the "pathway" into the simulation method of potential pollution scope of the site for key industry enterprises over 50 years of history according to the production information of enterprises and years of natural environment information and evaluates the vulnerability of receptors and site hazards in the Yangtze River Delta according to the pollution scope. On this basis, this study compared the change of the receptor index of relocation enterprises before and after production and closure to evaluate the effect of environmental protection policy control. Finally, based on the site hazards and the vulnerability of peripheral receptors within the pollution range of the production enterprises, we constructed the risk classification at the county scale in the Yangtze River Delta and proposed priority control of county units. The results show that the chemical industry and electroplating industry are the pillar industries of the Yangtze River Delta, accounting for more than 85%, mainly distributed in the eastern region. By 2020, implementing environmental protection policies has effectively safeguarded environmental protection policies that more than 17 million people and protected approximately 23000km² of agricultural land in the Yangtze River Delta from higher risks, reducing potential pollution by 42%. The study identified eight high-risk counties as priority control areas in the Yangtze River Delta in 2020, including Pudong New Area, Fuyang District, Jiading District, Zhangjiagang City, and Xiaoshan District.

Key words

control effectiveness / county scale / key industry / pollution range simulation / risk division / soil

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JU Tie-nan, LEI Mei, GUO Guang-hui, XU Yuan, LOU Qi-jia, ZHANG Yang, ZHANG Jin-long. Comprehensive risk assessment of key supervision units of soil pollution in Yangtze River Delta[J]. China Environmental Science. 2023, 43(12): 6490-6499

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