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| Toxicity and Bioaccumulation of Polychlorinated Biphenyls to Mud Snail Bullacta exarata at Intertidal Zone |
| YIN Cui-ling,ZHANG Qiu-feng,NIU Fu-xin,XU Yu-shan,MA Yu-yan |
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Abstract The water quality , and polychlorinated biphenyls (PCBs ) levels were determined in the sediments and mud snail Bullacta exarata sampled from the intertidal Dagang Power Plant using gas chromatography Agilent 6890 .The results showed that there were PCBs levels at concentration of 16 .74 ng/g in the water ,21 .9 ng/g in the sediment and 24 .2 ng/g in the mud snails .The acute toxicity of PCBs to the mud snail revealed that the 96 h LC50 value was 92 .7 mg/kg for the snail ,with NOEC value of 50 mg/kg .The PCBs accumulation in the mud snails showed that the PCBs BSAF values were found to be changed with time ,with BSAF values of 1 .29 on the seventh day and 0 .78 on the twelfth day ,indicating that the PCBs accumulation in the mud snail body was increased first and then decreased .
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Received: 25 April 2014
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