Cu^(2+)、Cd^(2+)和Se^(4+)对大型氵蚤的单一及联合毒性效应  

Individual and combined toxicity of Cu^(2+),Cd^(2+) and Se^(4+) to Daphnia magna

作　　者：董晓晓[1] 刘腾腾[1] 孔强[1] 陆江[2] 付荣恕[1] 

机构地区：[1]山东师范大学生命科学学院,山东济南250014 [2]济南军区空军后勤部,山东济南250002

出　　处：《山东科学》2012年第2期38-43,共6页Shandong Science

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07209-006)

摘　　要：以静水生物测试法研究了Cu2+、Cd2+和Se4+对大型溞(Daphnia magna)的单一及联合毒性效应,并采用水生毒理联合毒性相加指数法对其联合毒性效应进行了评价。单一毒性实验结果表明,Cu2+、Cd2+和Se4+对大型溞的毒性大小为:Cu2+>Cd2+>Se4+。联合毒性实验结果表明,Cu2+、Cd2+和Se4+对大型溞的联合毒性比较复杂,在两两共存或三者共存时,随着浓度配比方式的不同,联合毒性效应发生变化,显示出一定的复杂性。值得注意的是,Cu2+-Cd2+在毒性1∶1配比时,联合毒性效应随暴露时间的延长由拮抗作用转变为协同作用,与其他几种联合方式相比,表现出一定的特殊性。We addressed the individual and combined toxicity of Cu2＋ , Cd2＋ and Se4＋ to Daphnia magna with a static test method. We also employed additive index method to evaluate their combined toxicity. Individual toxicity experiment shows that the toxicity of Cu2＋, Cd2＋and Se4＋ is degressive. Combined toxicity experiment shows that complex toxicity effect exhibits for different concentration ratios of Cu2＋ , Cd2＋ and Se4＋. Especially, the combined toxicity effect changed from antagonistic response to synergistic response with the increase of exposure time for equal concentration ratio of Cu2＋ and Cd2 ＋.

关 键 词：CU2+ Cd2+ Se4+ 大型溞 联合毒性 

分 类 号：X826[环境科学与工程—环境工程]