Polybrominated diphenyl ethers in road and farmland soils from an e-waste recycling region in Southern China: concentrations, source profiles, and potential dispersion and deposition.
The present study analyzed road soils collected near the dismantling workshops of an e-waste recycling region in South China to determine the PBDE profiles. Farmland soils at a distance of about 2 km from the dismantling workshops were also collected to evaluate the potential dispersion and deposition of PBDEs in the surrounding environment. Total PBDE concentrations ranged from 191 to 9156 ng/g dry weight in road soils and from 2.9 to 207 ng/g dry weight in farmland soils, respectively. Three PBDE source profiles were observed from the road soils by principal component analysis, and were compared with the congener patterns in different technical products. Elevated abundances of octa- and nona-congeners were found in the "deca-" derived PBDEs as compared with the deca-BDE products. The results in this study suggest that debromination of BDE 209 may have occurred during the use of electric and electronic equipment and/or another technical formulation (Bromkal 79-8DE) was also likely the source of octa- and nona-congeners in e-wastes. Comparison of the PBDE patterns in road and farmland soils implied that the PBDEs in farmland soils have been subject to complex environmental processes.
Luo
Yong
Y
School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, China.
Luo
Xiao-Jun
XJ
Lin
Zhen
Z
Chen
She-Jun
SJ
Liu
Juan
J
Mai
Bi-Xian
BX
Yang
Zhong-Yi
ZY
D000383:Agriculture; D002681:China; D003247:Conservation of Natural Resources; D004581:Electronics; D004785:Environmental Pollutants / Q000032:analysis*; D004787:Environmental Pollution; D055768:Halogenated Diphenyl Ethers / Q000032:analysis*; D006801:Humans; D012275:Oryza; D012037:Refuse Disposal / Q000379:methods*; D012987:Soil / Q000032:analysis*; D014505:Urban Population
D004785:Environmental Pollutants; D055768:Halogenated Diphenyl Ethers; D012987:Soil