废塑料再生利用二(口英)污染特征及暴露风险

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Abstract The pollution level, emission characteristics and exposure risk of PCDD/Fs from a number of waste recycling enterprises were investigated in a certain province of China. The results showed that the TEQ values of PCDD/Fs in the flue gas samples ranged from 0.0796 to 0.478ng/m³(I-TEQ) with an average value of 0.194ng/m³(I-TEQ). In addition, the level of PCDD/Fs in plastic waste recycling industry was higher than the current standard limit(0.1ng/m³). The concentrations of PCDD/Fs in the ambient air samples of waste recycling enterprises area ranged from 0.256 to 2.15pg/m³ (I-TEQ) and the reference point ranged from 0.0356 to 0.178pg/m³(I-TEQ). The results of fingerprint analysis showed that high-chlorinated monomers including OCDF, OCDD, 1,2,3,4,6,7, 8-HpCDF and 1,2,3,4,6,7,8-HpCDD were the primary PCDD/F congeners in the flue gas and ambient air samples. 2,3,4,7,8-PeCDF was the most dominant congener contributing to TEQ values. The concentration of PCDFs was higher PCDDs in the ambient air samples, which was characterized by heat source. The exposure risk assessment suggested that human exposure to PCDD/Fs via inhalaition for the residents living in the studied area was at a relatively safe level. The contribution rate of respiratory exposure to PCDD/Fs for some individuals exceeded the evaluation standard and deserves more attention.

Key words： plastic waste recycling PCDD/Fs pollution characteristics exposure risk

Received: 15 February 2023

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X511

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	Articles by authors
	YANG Yan-yan
	LI Shi-ping
	XIE Dan-ping
	FU Jian-ping
	DING Zi-rong
	HAN Jing-lei
	ZHANG Su-kun

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YANG Yan-yan,LI Shi-ping,XIE Dan-ping等. Pollution characteristics and exposure risk of PCDD/Fs from plastic waste recycling industry[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(9): 4926-4933.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I9/4926

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