期刊
POLYCYCLIC AROMATIC COMPOUNDS
卷 34, 期 4, 页码 425-438出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/10406638.2014.900644
关键词
carcinogenic risk; dl-PCBs; ecological risk; non-carcinogenic risk; wetland soils
资金
- Major Science and Technology Program for Water Pollution Control and Treatment [2013ZX07202-007]
- program for New Century Excellent Talents in University [NCET-10-0758]
Forty one soil samples were collected from Liaohe estuarine wetland in May 2009 for assessing the distribution, ecological risk, and health risk of dioxin-like PCBs (dl-PCBs). The total concentrations of 12 dl-PCBs ranged from 0.36-1.36 ng/g, with a mean value of 0.77 ng/g. The dominant dl-PCBs were Tetra-CBs, which contributed to 43.9% of the total. The ecological risk of dl-PCBs was analyzed based on the toxic equivalent (TEQ) approach. In this study, the TEQ concentrations of dl-PCBs in soils varied from 0.06-22.55 pg/g, with a mean value of 8.18 pg/g. Human health risk was evaluated based on the non carcinogenic and carcinogenic risk method. Non carcinogenic risk was measured using a hazard quotient (HQ) values for 95% upper control limit (UCL) and maximum concentrations of dl-PCBs. HQ values were lower than 1 under both exposure scenarios, which indicated that the non carcinogenic risk of dl-PCBs was negligible. Carcinogenic risk was estimated based on the criteria of ingestion, dermal contact and inhalation of soils. Carcinogenic risk values were less than 10(-6), which exhibited negligible cancer risk for infant, child and adult, respectively, through ingestion, dermal contact, and inhalation pathway.
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