Cu^(2+)、Zn^(2+)、Al^(3+)对泥鳅的单一和联合毒性研究  

Effects of Cu^(2+), Zn^(2+), Al^(3+)on single and joint toxicities of loach

作　　者：卢少勇[1] 赵不凋[2] 刘洁[1,2] 朱旭[1] 陈方鑫[1,3] 吴鑫[1] 

机构地区：[1]中国环境科学研究院,湖泊水污染治理与生态修复技术国家工程实验室,环境基准与风险评估国家重点实验室,国家环境保护洞庭湖科学观测研究站,北京100012 [2]大连民族学院环境与资源学院,大连116600 [3]中国地质大学(北京)水资源与环境学院,北京100012

出　　处：《科技导报》2017年第9期30-34,共5页Science & Technology Review

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07101-014;2012ZX07105-002);中央级公益性科研院所基本科研业务专项(2012-YSKY-14)

摘　　要：本文研究了Cu^(2+)、Zn^(2+)、Al^(3+)3种离子对泥鳅的单一和联合毒性。结果表明:Zn^(2+)和Al^(3+)对泥鳅24h的半致死浓度(LC_(50))分别为3.24和1.50mg/L;Cu^(2+)、Zn^(2+)和Al^(3+)对泥鳅48h的LC_(50)分别为1.05、3.02和1.43mg/L,对泥鳅72h的LC_(50)则为0.67、3.02和1.39mg/L,对泥鳅96h的LC_(50)分别为0.56、2.87和1.35mg/L;而Cu^(2+)、Zn^(2+)、Al^(3+)3种离子对泥鳅96h的安全浓度分别为0.0056、0.029和0.014mg/L。采用Marking相加指数评价法进一步分析结果显示,Cu^(2+)-Zn^(2+)-Al^(3+)混合溶液对泥鳅表现出拮抗作用(48和72h)和协同作用(96h)。In order to study the acute toxicity of three kinds of ions （Cu^2＋, Zn^2＋, Al^3＋） on loach and the change of the processed loach liver antioxidant enzyme activity and lipid peroxidation, experiments have been conducted. The result shows that for loach exposed to Cu^2＋, Zn^2＋, Al^3＋ solutions, the 24 h half-lethal concentrations are Zn^2＋ 3.243 and Al^3＋ 1.497 mg/L; the 48h half-lethal concentrations are Cu2＋1.054 rag/L, Zn2＋3.017 mg/L and AP＋ 1.425 mg/L; the 72 h half-lethal concentrations are Cu^2＋ 0.666, Zn^2＋3.017 and Al^3＋ 1.386 rag/L; the 96 h half- lethal concentrations are Cu^2＋ 0.563 mg/L, Zn^2＋ 2.874 mg/L and Al^3＋ 1.350 mg/L. The 96 h safe concentrations are Cu^2＋0.563 mg/L, Zn2. 2.874 mg/L, and Al^3＋ 1.350 mg/L. Thus, the order of toxicity to loach from strong to weak is Cu^2＋〉Al^3＋〉Zn^2＋. For loach exposed to a Cu^2＋- Zn^2＋-Al^3＋ mixed solution, the 48 h, 72 h, the 96 h joint toxicity effect performances are respectively antagonistic action, antagonistic action, and synergy. The safe Zn^2＋ concentration of loach is 0.029 mg/L which is far lower than 0.10 mg/L, the National Standard of Fishery Water Quality in China.

关 键 词：CU^2+ ZN^2+ AL^3+ 泥鳅 单一毒性 联合毒性 

分 类 号：X171.5[环境科学与工程—环境科学]