Unintentionally-produced persistent organic pollutants in the aquatic environment contaminated from historical chlor-alkali production☆

被引:1
作者
Huang, Zichun [1 ,2 ,3 ]
Wang, Chu [4 ]
Liu, Guorui [1 ,2 ,3 ]
Yang, Lili [1 ,2 ,3 ]
Luo, Xi [4 ]
Liang, Yong [5 ]
Wang, Pu [5 ]
Zheng, Minghui [1 ,2 ,3 ]
机构
[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China
[2] UCAS, Inst Environm & Hlth, Hangzhou Inst Adv Study, Hangzhou 310024, Peoples R China
[3] Univ Chinese Acad Sci, Coll Resource & Environm, Beijing 100049, Peoples R China
[4] Changjiang Survey Planning Design & Res Co Ltd, Wuhan 430010, Peoples R China
[5] Jianghan Univ, Wuhan 430056, Hubei, Peoples R China
关键词
Persistent organic pollutant; Halogenated polycyclic aromatic hydrocarbon; Chlor-alkali; Sediment; Aquatic biota; POLYCYCLIC AROMATIC-HYDROCARBONS; YA-ER LAKE; DIBENZO-P-DIOXINS; POLYCHLORINATED NAPHTHALENES; PESTICIDE PRODUCTION; HUMAN HEALTH; IN-VIVO; SEDIMENT; PARENT; CHINA;
D O I
10.1016/j.envpol.2024.124882
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Historical chlor-alkali production has led to substantial concentrations of persistent organic pollutant residues in the environment. This study systematically investigated the distribution of polycyclic aromatic hydrocarbons (PAHs), chlorinated/brominated-PAHs (Cl/Br-PAHs), polychlorinated naphthalenes (PCNs), and hexachlorobutadiene (HCBD) in sediment, lotus (Nelumbo nucifera), and fish samples from Ya-Er Lake, which is a site in China with historical chlor-alkali contamination. The average concentrations [(4.97-1.47) x 10(3 )ng/g dry weight (dw)] of these pollutants in backfill sediments, which were dredged from the lake after chlor-alkali production stopped, were 2.68-70.87 times those in fresh lake sediments (0.622-218 ng/g dw) and reported concentrations in other areas. Correlation analyses indicated that Cl-PAHs, Br-PAHs, and PCNs likely originated from halogenation of parent PAHs in the study area, and the chlorination ratios were larger than those of bromination. The Cl(1/2/3)-PAHs/PAHs and Br(1)-PAHs/PAHs ratios were higher than those for PAHs with more halogen atoms. This contamination extended into the biota, with notable pollutant burdens found in lotus (Nelumbo nucifera, 0.305-77.3 ng/g dw) and even higher concentrations in fish (2.20-345 ng/g lipid weight). Estimated biological soil accumulation factors revealed significant enrichment in lotus organs (mean: 7.19) and fish muscle (mean: 10.65), especially the latter, which highlighted bioaccumulation and potential food chain transfer risks. The estimated daily intakes of PAHs, Cl/Br-PAHs, and HCBD through fish consumption currently pose negligible risks, while dietary intake of PCNs may present health concerns. Continuous monitoring and impact assessments are crucial for developing appropriate risk management strategies to safeguard public health.
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页数:9
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