Cu、Zn、Cd、Hg对青海弧菌(Q67菌株)联合毒性作用的研究  

Combined toxicity of Cu、Zn、Cd、Hg to Vibrio Qinghaiensis Sp.Nov. (strain Q67)

作　　者：刘清[1] 马梅[1] 童中华[1] 王子健[1] 

机构地区：[1]中国科学院生态环境研究中心环境水化学国家重点实验室

出　　处：《中国环境科学》1997年第4期301-303,共3页China Environmental Science

基　　金：国家自然科学基金

摘　　要：采用等毒性混合法（ｅｑｕｉｔｏｘｉｃｍｉｘｔｕｒｅ）探讨了Ｃｕ、Ｚｎ、Ｃｄ、Ｈｇ对青海弧菌（Ｑ６７菌珠）的联合毒性作用。当两种金属作用时，Ｚｎ和Ｃｄ为拮抗作用，Ｃｕ和Ｚｎ为加和作用，Ｃｕ和Ｃｄ、Ｃｕ和Ｈｇ、Ｚｎ和Ｈｇ、Ｃｄ和Ｈｇ均为协同作用。而当３种或４种金属同时作用时，联合毒性作用均趋向于加和作用，其机理还有待于进一步研究。A new species of luminous bacterium Vibrio Qinghaiensis Sp.Nov. (strain Q67),which can grow well and emit light in media without sodium ions,has been introduced in environmental monitoring.In this study,the combined toxicity of four heavy metals to the bacterium was investigated.The EC 50 values for Cu,Zn,Cd and Hg were 3.3,1.4,2.6 and 2.5μ M respectively.When the organisms were exposed to equitoxic mixtures,synergistic effects have been found in paired mixtures with the exception of Zn Cd which acts antagonistically and Cu Zn additively.As the number of constituents in the mixtures increased,combined effects tend to be consistent with an additive mode.

关 键 词：生物毒性 青海弧菌 重金属 水质污染 毒性试验 

分 类 号：X520.32[环境科学与工程—环境工程] R995[医药卫生—毒理学]