Distribution and health risk assessment of organochlorine pesticides (OCPs) inindustrial site soils: A case study of urban renewal in Beijing, China
YANG Wenrui , WANG Rusong , ZHOU Chuanbin , LI Feng
DOI:
Received March 25, 2008,Revised June 10, 2008, Accepted , Available online
Volume 21,2009,Pages 366-372
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A field survey was conducted in a contaminated industrial site of southern Beijing, China to investigate the contents and distribution
of the organochlorine pesticides ( -, -,
-, -HCH, p,p0-DDT, p,p0-DDE, p,p0-DDD and o,p0-DDT) in the profiles of soil, and a
health risk assessment was carried out with CalTOX multimedia exposure model. Results showed that mean concentrations of total
hexachlorocyclohexane isomers (HCHs) and total dichlorodiphenyltrichloroethane isomers (DDXs) in soils were in the range of 13.20–
148.71 mg/kg, and 3.02–67.43 mg/kg, respectively. Organochlorine pesticides (OCPs) content peaked in the surface and declined in soil
profile with depth. The amounts of HCHs in three profiles of soil were larger than DDXs. Composition analysis indicated that there was
a trend of degradation of OCPs in the site, but the mean of HCHs and DDXs concentration were over the state warning standard limit
(HCHs, 0.50 mg/kg; DDXs, 0.50 mg/kg). According to current land use development, health risk assessment with CalTOX and Monte
Carlo analysis showed that health risks mainly came from two exposure pathways: dermal uptake and inhalation, and the total risk
values all exceeded the general acceptable health risk value (10??6). The sensitivity analysis indicated that five parameters significantly
contributed to total risk.
