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摘要: 采用发光细菌、鱼类和小鼠急性毒性试验和大鼠亚急性毒性试验检测了苏州河底泥及河水的生物毒性。结果表明:苏州河各河段底泥和河水对淡水发光细菌青海弧菌Q67 (Vibrio qinghaiensis Q67)呈现出程度不等的急性毒性,其中市区河段毒性高于市郊河段,夏季毒性高于冬季,底泥毒性高于河水;野外现场鱼类急性毒性试验结果表明苏州河市区河段(长寿路桥和浙江路桥河段)水体对卿鱼具有较明显的急性毒性作用;小鼠急性毒性试验表明,北新径河段底泥浸出液存在一定的急性毒性;大鼠亚急性毒性试验表明,北新径河段底泥浸出液和河水可能对动物存在肝毒性.上述结果提示,目前苏州河尤其是市区河段水体总体上不利于生物生存。Abstract: The toxicity of sediment and water of Suzhou Creek was investigated by toxicological methods including acute and sub-acute toxicity test performed on luminescent bacteria, fishes, mice and rats. In luminescent bacteria toxicity test, for the reaches of Zhaotun, Huangdu, Huacao, Beixinjing, Panwanli,Changshou Lu Bridge, Wuning Lu Bridge and Zhejiang Lu Bridge, exposure to the water and the lixivium of sediment inhibited the luminescence, which suggests these samples have toxicity effect on the photobacteria. Furthermore, the toxicity effect is more obvious in urban reaches than in suburb ones, in summer than in winter, in the sediment than in the water. In field test, for the reaches of Changshou Lu Bridge and Zhejiang Lu Bridge, after exposure for 96 hours the livability rate of crucian respectively decreased to 0% and 30%;but for Huangdu reach the livability rates crucian was 83 %. The results suggest urban reaches are evidently unsuitable for cruciads survival. The results of the test on mice suggest the sedimant of Beixinjingreach has acute toxicity to mice. According to the results of sub-acute test on rats the sediment and the water of Beixinjing reach could be harmful to animars liver. On the basis of the above results we draw the conclusion that Suzhou Creek especially its reaches in urban area is unfavorable for biological survival.
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Key words:
- Suzhou creeksedimentwatertoxicity /
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