Distribution, sources, and risk assessment of polycyclic aromatic hydrocarbons (PAHs) in Kaokaowusu river sediments near a coal industrial zone

被引:4
作者
Wang, Zhu [1 ,2 ]
Liu, Yong Jun [1 ,2 ]
Yang, Lu [1 ,2 ]
Yang, Zhuang Zhuang [1 ,2 ]
Zhang, Ai Ning [1 ,2 ]
Li, Zhi Hua [1 ,2 ]
Liu, Zhe [1 ,2 ]
机构
[1] Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Yan Ta Rd 13, Xian 710055, Peoples R China
[2] Xian Univ Architecture & Technol, Key Lab Northwest Water Resource Environm & Ecol, Minist Educ, Xian 710055, Peoples R China
基金
中国国家自然科学基金;
关键词
PAHs; Pollution characteristics; Source apportionment; Risk assessment; Industrial area; Sediment; SURFACE SEDIMENTS; SOURCE APPORTIONMENT; ORGANIC POLLUTANTS; MARINE-SEDIMENTS; YANGTZE ESTUARY; ECOLOGICAL RISK; WATER; TOXICITY; SEA; ORIGINS;
D O I
10.1007/s10653-022-01454-y
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study systematically analyzed the contents, compositions, and sources of polycyclic aromatic hydrocarbons (PAHs) in river sediments near an important energy and chemical base in northwest China. In addition, their possible adverse effects on the ecology and human health were assessed. The PAH concentrations in this study area ranged from 2641.28 to 16783.72 (ng/g dw). PAHs of medium molecular weight (3-ring and 4-ring) showed the largest proportion, followed by PAHs of higher molecular weight (5-ring and 6-ring). The results of molecular diagnostic ratios and principal component analysis revealed that PAHs in the region have complex sources, with incomplete combustion of local fossil fuels and traffic exhaust factors being the main sources. The total toxic equivalent concentration of PAHs varied from 10.05 to 760.26 ng/g, and according to the sediment quality guidelines, PAHs have high potential ecological risk in the lower reaches of the river. The mean effect range-median quotient for the region was 0.46, and the combined ecological risk was at moderate to high levels (21% probability of toxicity). The lifetime carcinogenic risks for adults and children exposed to PAHs were 2.95 x 10(-3) and 1.87 x 10(-2), respectively, which are much higher than the limit of 10(-4), indicating moderate to high potential cancer risks. Therefore, the local government should consider taking some environmental remediation measures. This study can provide theoretical support for pollution prevention measures and ecological restoration strategies for rivers in resource-rich areas.
引用
收藏
页码:6853 / 6867
页数:15
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