淮北矿区煤矸石多环芳烃污染特征及毒性评价

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Abstract In this paper, we collected 13 gangue samples (7 fresh samples and 6 weathered samples) from Liuqiao Mine in Huaibei, and 16 parent polycyclic aromatic hydrocarbons (16 PAHs) and alkyl-polycyclic aromatic hydrocarbons (a-PAHs) were analyzed by GC-MS/MS on qualitative and quantitative. The results showed that 16PAHs and a-PAHs were generally contained in coal gangue, and the content level of a-PAHs (∑a-PAHs average 587.88ng/g, n=13) was generally higher than that of 16PAHs (∑16PAHs average 505.23ng/g, n=13). The most abundant substance was naphthalene, phenanthrene and chrysene, accounted for 15%, 33% and 15% of ∑16PAHs, respectively. Alkyl-naphthalene and alkyl-phenanthrene in the content of the advantage, accounted for 22% and 40% of ∑a-PAHs. The contents of ∑16PAHs and ∑a-PAHs in the weathered samples was higher than those in the fresh samples. Only the contents of Benzoapyrene and C₂-phenanthrene decreased after weathering, and the corresponding contents of C₁-Benzoapyrene and phenanthrene increased after weathering. The characteristic ratio shown that the coal gangue samples satisfy 0<C₀/(C₀+C₁-C₄) PHE<0.25 and 0.2<C₀/(C₀+C₁-C₅) NAP<0.55; apply these ratios to PAHs of coal, petroleum, sediment also have a good dispersion. Therefore, these ratios can be used for identify PAHs from coal gangue. Through the toxicity evaluation of coal gangue, the average Benzoapyrene toxicity equivalent concentration reached 194.60ng/g, in which a-PAH contributed most of the toxicity equivalent concentration. This study provides basic experimental data for the source of PAHs and reveals the possible ecological risks of PAHs in coal gangue.

Key words： coal gangue a-PAHs weathering characteristics ratio toxic equivalent (TEQ)

Received: 05 July 2021

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X503

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	CHEN Xue
	XU Dan-dan
	QIAN Ya-hu
	HONG Xiu-ping
	LIANG Han-dong

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CHEN Xue,XU Dan-dan,QIAN Ya-hu等. Pollution characteristics and toxicity assessment of PAHs in coal gangue from mine aera in Huaibei[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(2): 753-760.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I2/753

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