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| Pollution Characteristics and Exposure Risk Assessment of Polybrominated Diphenyl Ethers in Different Types Agricultural Soils in Guiyu Area |
| Received:December 03, 2014 |
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| KeyWord:PBDEs;Guiyu;exposure risk assessment;e-waste recycling area |
| Author Name | Affiliation | E-mail | | HAO Di | College of Environment, Jinan University, Guangzhou 510632, China | | | YI Ru-han | College of Environment, Jinan University, Guangzhou 510632, China
Key Laboratory of Water/Soil Toxic Pollutants Control and Bioremediation, Department of Education of Guangdong Province, Guangzhou 510632, China | tyiruhan@jnu.edu.cn | | WU Yu | College of Environment, Jinan University, Guangzhou 510632, China | | | LU Yun-feng | College of Environment, Jinan University, Guangzhou 510632, China | | | FANG Chuang-li | College of Environment, Jinan University, Guangzhou 510632, China | |
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| Abstract: |
| Extensive applications of polybrominated diphenyl ethers(PBDEs) have caused the environmental pollution. In the present study, 131 agricultural topsoil samples were collected from different land uses within 128 square kilometer area surrounding Guiyu, and the concentrations of 41 PBDE congeners in each sample were determined. Results showed that the concentrations of 41 PBDE congeners varied from 30 to 9400 ng·g-1, and those of deca-polybrominated diphenyl ether(BDE209) ranged from no detection to 9200 ng·g-1. There were 18 PBDE congeners whose detection frequencies were higher than 90%, indicating the general presence of polybrominated diphenyl ethers in different land use types of agricultural soils in e-waste recycling area. The concentrations of 40 polybrominated diphenyl ether congeners except BDE209(∑40PBDEs) were in order of paddy soils >orchard soils >other flooded soils >vegetable soils >wood field soils >waste field soils, but that of BDE209 decreased in order of waste field soils >vegetable soils >other flooded soils > paddy rice soils >orchard soils >forest soils. According to the “Technical Guidelines for Risk Assessment of Contaminated Sites”(HJ25.3-2014), exposure risk assessments of PBDEs via skin contact, oral ingestion, and inhalation of soil particles were carried out for BDE47, BDE99, BDE153 and BDE209 that are the priority control pollutants by US Environmental Protection Agency(USEPA). The results indicated that all exposure levels of BDE47, BDE99, BDE153 and BDE209 via these three pathways did not exceed the USEPA reference doses. However, it is critical to study the risk of polybrominated diphenyl ethers in agricultural soils via food chain. |
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