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《Acta Scicentiarum Naturalum Universitis Pekinesis》 2004-06
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Studies on Acute Toxicity Effects of Heavy Metal Pollutants Collected from the Yangtze and Yellow Rivers

CHENG Bingqi 1),2) MA Mei 2) WANG Zijian 2) CHEN Jingsheng 1),3) HONG Song 1) ( 1)College of Environmental Sciences,Peking University,Beijing,100871;= 2)State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco|Environmental=Sciences,Chinese Academy of Sciences,Beijing,100085  
Natural freshwater sediment and water column samples were collected from Wuhan section along the Yangtze River and Zhengzhou section along the Yellow river in Oct. 2000.These sediment samples were spiked with Cu,Pb,Zn,Cd.The water column and the interstitial waters were spiked with Cu,Pb,Zn,Cd,Ni in the laboratory.The Vibrio qinghaiensis sp. Q|67 and the cladoceran Daphnia magna were introduced as test species in both solid| and liquid|phases toxicity bioassays.Based on the EC 50/LC 50 measured and calculated in bioassays,the toxicity differences of the sediment and water column samples between the representative sections along the Yangtze and Yellow rivers were evaluated.The natural water column and the natural interstitial waters from both sections have no acute toxicity effects on the Vibrio qinghaiensis sp. Q|67,however,the 96?h acute toxicity effect of natural sediment from the Yangtze river on Daphnia magna is evident.The acute toxicity effects of all the five heavy metals|spiked interstitial waters collected from the Yangtze river are lower than the Yellow river counterparts,however,the acute toxicity effects of Zn|spiked and Ni|spiked overlying water samples collected from the Yangtze river are higher than the Yellow river counterparts.As for the heavy metals|spiked sediments from the Yangtze river,the toxicity differences among the four heavy metals on Daphnia magna are Cd,Cu,Zn,Pb(in descending order).
【Fund】: 国家重点基础研究发展规划资助项目 (19990 4 36 0 3)
【CateGory Index】: X52
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