Cd,Pb和As对发光菌的急性毒性效应研究  

Studies on Acute Toxic Effects of Cd,Pb and As on Photobacterium Phosphoreum

作　　者：周秀艳[1] 王恩德[2] 韩桂春 

机构地区：[1]东北大学秦皇岛分校,河北秦皇岛066004 [2]东北大学资源与土木工程学院,辽宁沈阳110004 [3]辽宁省环境监测中心站,辽宁沈阳110031

出　　处：《东北大学学报（自然科学版）》2008年第11期1645-1647,共3页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展计划项目(2004CB418506);河北省教育厅项目(Z2006407)

摘　　要：发光菌为试验生物,在实验室条件下对Cd,Pb,As元素分别进行了单一元素毒性和等比混合法联合毒性试验,并比较预期EC50和实测EC50,由毒性加强指数来评价联合作用方式.结果表明,单一元素Cd,Pb,As的EC50值分别为2.411,1.668,0.463 mg/L.它们的毒性强弱顺序为As>Pb>Cd.当Cd,Pb两种元素联合作用时,其EC50值为0.293 mg/L,预期EC50和实测EC50比值为6.7,表现为协同作用.当Cd,Pb,As三种元素同时作用时,预期EC50和实测EC50比值为1.3,表现为相加作用.The joint toxicity from equitoxic mixture and the toxicity of single material as cadmium and lead and that of arsenic were tested in lab with the germ Photobacterium Phosphoreum introduced as test samples. Comparing the expected and measured EC50 values, the toxicity enhancement index was used to evaluate the effect of joint toxicity. The single toxicity test results of cadmium, lead and arsenic showed that their EC50 values are 2.411, 1.668 and 0.463 mg/L, respectively, i. e. , As 〉 Pb 〉 Cd in toxic effect. For the Cd-Pb joint toxicity from equitoxic mixture, the EC50 value is 0.293 mg/L and the ECs0ratio of expected value to measured one is 6.7, i.e., a synergistic toxic effect. However, for the Cd-Pb-As joint toxicity, 1.3, i.e. , a superposed toxic effect.

关 键 词：重金属 生物毒性 发光菌 联合毒性 毒性效应 

分 类 号：X171.5[环境科学与工程—环境科学]