ToxTell生物传感器在Cu^(2＋)、Cd^(2＋)冲击活性污泥系统分析中的应用  

Copper and Cadmium Toxicities to Activated Sludge Investigated with ToxTell Biosensor

作　　者：王学江[1] 王鑫[1] 刘免[1] 吴真[1] 杨连珍[1] 夏四清[1] 

机构地区：[1]同济大学环境科学与工程学院,污染控制与资源化研究国家重点实验室,上海200092

出　　处：《环境科学》2012年第6期2090-2094,共5页Environmental Science

基　　金：国家自然科学基金项目(51179127);国家水体污染控制与治理科技重大专项(2009ZX07317-008-4)

摘　　要：探讨了不同浓度Cu2+及Cu2+和Cd2+联合对活性污泥系统COD去除的影响,并采用ToxTell生物传感器,以活性污泥为指示微生物,分析了上述金属离子的毒性抑制作用.结果表明,Cu2+浓度低于10 mg.L-1时,不会对该活性污泥系统带来明显的冲击作用,Cd2+的加入明显增强了对该活性污泥系统COD去除的抑制作用,上述金属离子在抑制时间为1.5 h时对系统COD去除抑制率达到最大,随着曝气时间的延长,COD去除率呈逐渐上升趋势;ToxTell生物传感器的毒性分析结果与COD去除抑制率相近,初步证实该生物传感器能很好地用于活性污泥处理系统受Cu2+、Cd2+离子冲击的预警监测.Effects of different concentrations of Cu2+,Cu2+and Cd2+ combined pollution on the removal performance of COD in activated sludge system were investigated,and the ToxTell biosensor with activated sludge was constructed to determine the toxicity of Cu2+,Cu2+and Cd2+ combined pollution.The results showed that there was no significant impact on the activated sludge process when Cu2+ concentration was lower than 10 mg·L-1,and the addition of Cd2+ enhanced the inhibition of COD removal,and the maximum inhibition efficiency of COD reached at about 1.5 h.With the increase of aeration time,the COD removal efficiency increased slowly again.The toxicity measurement with ToxTell biosensor was close to the biological effects(inhibition efficiencies of COD),which showed that the ToxTell biosensor could be used well in the early warming determination of Cu2+ and Cd2+in the activated sludge process.

关 键 词：生物传感器 毒性 活性污泥 抑制 重金属 

分 类 号：X83[环境科学与工程—环境工程]