Ecotoxicological e ects of mixed pollutants resulted from e-wastes recyclingand bioaccumulation of polybrominated diphenyl ethersin Chinese loach (Misgurnus anguillicaudatus)
QIN Xiaofei , XIA Xijuan , LI Yan , ZHAO Yaxian , YANG Zhongzhi , FU Shan , TIAN Mi , ZHAO Xingru , QIN Zhanfen , XU Xiaobai , YANG Yongjian
DOI:
Received February 01, 2009,Revised May 06, 2009, Accepted , Available online
Volume 21,2009,Pages 1695-1701
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To understand potential ecotoxicological e ects of electrical and electronic equipment waste (e-waste) recycling and polybrominated
diphenyl ethers (PBDEs) bioaccumulation in loaches, a semi-field experiment using Chinese loach (Misgurnus anguillicaudatus) as
experimental fish was performed. Larval loaches were kept in net-cage for three months in an e-wastes recycling site and a reference
site in Southeastern China. There was significant di erence of the survival rate between the loaches from the e-wastes recycling site
(27%, 19/70) and from reference site (70%, 49/70). Histopathological responses were also found in all the livers examined in loaches
from the e-wastes recycling site. These results showed that mixed pollutants resulted from e-wastes recycling led to ecotoxicological
e ects on loaches. The bioaccumulation of polybrominated diphenyl ethers (PBDEs), the main pollutants in e-waste, in loaches was
also studied, the mean concentration of total PBDEs in sediment was 6726.17 ng/g wet weight and in water samples was 4.08 ng/L
(dissolved phase). BDE 209 was the dominant congener in sediment and with relatively high concentration in water. Relatively low
concentration of BDE 209 (less than 0.01% of total PBDEs) and high concentration of BDE47 (up to 39.34% of total PBDEs) were
detected in loaches.
