农药废水对秀丽隐杆线虫毒性效应及其主要有毒组分

应用battery生物测试法，检测研究农药废水对秀丽隐杆线虫的生命周期、繁殖速率、生殖能力、头摆和身体弯曲频率等影响的生物毒性，及其引发生物毒性的主要有机污染物。结果表明，在已经达到国家废水排放标准GB 8978—1996]情况下，处理出水对受试动物仍然存在致毒效应；线虫的世代周期对进水的毒性最为敏感，产卵数量对出水的毒性最为敏感；进水毒性主要来自易受酸性调节影响的有机污染物，出水毒性主要来自易受碱性调节影响的有机污染物。结果表明，该项生物测试的毒性参数，可用于指示存在于低CODCr废水中的生物毒性；所用的毒性鉴别评价（TIE）方法，可用于鉴别废水中引发致毒效应的关键污染物。废水中悬浮颗粒污染物的生物毒性至关重要，尚未研究，有待继续。

Toxicity of A Pesticide Wastewater on Caenorhabditis elegans

The toxicities of influent and effluent for a pesticide wastewater treatment system on the model animal, Caenorhabditis elegan, were measured for identification of the target organic pollutants with the approach of toxicity identification evaluation（TIE ）. Although the effluent quality could met the limit as the list in Chinese Integrated Wastewater Discharge StandardGB 8978-1996], both the influent and effluent still revealed their toxicities on C. elegans proved in the battery bioassays with the parameters including life span, generation time, brood size, head thrashes and body bends. The generation time for C. elegans was sensitive to the influent and the hrood size of C. elegans was sensitive to the effluent. The major toxicants in the intluent were acidic organic compounds but in the effluent were alkalescent organic chemicals. The results indicated that the bioassay methods could be used to test the toxicity existed in the low CODCr wastewater and the approach of toxicity identification evaluation should be effective for discovering target toxicants.