兰州城市绿地SCCPs污染来源及人群健康风险

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Abstract Contamination characteristics of SCCPs in the soil of green land in the main urban area of Lanzhou city during the warm and cold seasons of 2022~2023 were observed, and the source assessment and identification were conducted using principal component analysis and multiple linear regression, the entropy value method was applied for the ecological risk assessment, and the health risk of the residents exposed to SCCPs was evaluated using the exposure assessment model. The concentrations of SCCPs in the study area ranged from 19.67 to 938.15ng/g (mean 296.00ng/g) during the warm season and from 61.11 to 976.20ng/g (mean 316.72ng/g) during the cold season, and the chlorine contents were 61.49%~64.62% and 61.79%~64.21%, respectively. C₁₀(35.80% and 40.15%) and C₁₁ (24.80% and 22.52%) were the predominant carbon homologues, as well as Cl₇(30.08% and 30.00%) and Cl₈ (23.89% and 24.44%). The result of source apportionment showed that the contamination might be emitted from industrial activities, discharge of wastewater and sludge from sewage treatment plants and wastewater irrigation. The ecological risk assessment indicated that the levels of SCCPs in the soil did not cause a significant risk to soil ecology, and the health risk assessment showed that the health risk of the residents exposed to soil SCCPs was below the tolerable daily intake (TDI) for both children and adults.

Key words： SCCPs urban green spaces source apportionment health risks

Received: 26 July 2023

PACS:

X53

Corresponding Authors: 毛潇萱,实验师,maoxx@lzu.edu.cn E-mail: maoxx@lzu.edu.cn

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	JIA Ning-yi
	CHENG Jing-long
	HU Bai-cheng
	GUO Yu-xuan
	SONG Shi-jie
	ZHAO Yuan
	MAO Xiao-xuan

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JIA Ning-yi,CHENG Jing-long,HU Bai-cheng等. Sources identification and health risks of short-chain chlorinated paraffin in urban green spaces in Lanzhou, China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(3): 1697-1705.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I3/1697

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