氯酸钾和重金属镉、砷对蝌蚪的单一和联合毒性  

Single and Joint Toxicity of Potassium Chlorate with Arsenic and Cadmium Ions to Tadpole

作　　者：陈桂葵[1] 罗程[1] 黎华寿[1] 

机构地区：[1]农业部生态农业重点开放实验室,广东省高等学校农业生态与农村环境重点实验室,华南农业大学农学院,广东广州510642

出　　处：《华南农业大学学报》2010年第4期59-62,共4页Journal of South China Agricultural University

基　　金：国家自然科学基金(30370289,30700099)

摘　　要：以静水生物测试法研究了氯酸钾和重金属砷、镉对蝌蚪的单一与联合毒性,同时采用相加指数法对联合毒性进行了评价.单一毒性试验表明:KClO3、Cd2+和As3+对蝌蚪的毒性顺序为Cd2+>As3+>KClO3,KClO3对蝌蚪24、48、96 h的半致死浓度(LC50)分别为7 459.93、6 459.65、5 753.19 mg.L-1,As3+对蝌蚪24、48、96 h的LC50分别为41.26、25.89、15.24 mg.L-1,Cd2+对蝌蚪24、48、96 h的LC50分别为8.16、6.32、4.98 mg.L-1.联合毒性试验结果表明,KClO3与Cd2+、KClO3与As3+共存时的联合毒性为协同作用,而Cd2+与As3+的联合毒性表现为拮抗作用.The single and joint toxicity of potassium chlorate with arsenic and cadmium ions to tadpole was determined by static test method,and the joint toxicity was evaluated by additive index method.The acute toxicities of potassium chlorate,Cd2＋ and As3＋ were in the sequence of Cd2＋As3＋potassium chlorate.LC50 of potassium chlorate to the tadpole during 24,48,96 h were 7 459.93,6 459.65,5 753.19 mg·L-1 respectively;LC50 of As3＋ to the tadpole during 24,48,96 h were 41.26,25.89,15.24 mg·L-1 respectively,and LC50 of Cd2＋ to the tadpole during 24,48,96 h were 8.16,6.32,4.98 mg·L-1 respectively.When the tadpoles were exposed to toxic mixtures,the results showed that the joint toxicities of potassium chlorate with Cd2＋ and potassium chlorate with As3＋ were synergistic,while the joint toxicity of Cd2＋with As3＋was antagonistic.

关 键 词：氯酸钾 镉 砷 联合毒性 蝌蚪 

分 类 号：X171.5[环境科学与工程—环境科学]