铅、镉、铬和锌盐对单环刺螠急性毒性效应的研究  

Acute Toxicity of Pb,Cd,Cr,and Zn Heavy Metal Salts to Echiuran Worm Urechis unicinctus

作　　者：许星鸿 刘统昊 朱晓莹 丁子媛 刘顺 王松林 徐国成 XU Xinghong;LIU Tonghao;ZHU Xiaoying;DING Ziyuan;LIU Shun;WANG Songlin;XU Guocheng(Jiangsu Key Laboratory of Marine Bioresources and Environment,Jiangsu Ocean University,Lianyungang 222005,China;School of Marine Science and Fisheries,Lianyungang 222005,China)

机构地区：[1]江苏海洋大学,江苏省海洋生物资源与环境重点实验室,江苏连云港222005 [2]江苏海洋大学海洋科学与水产学院,江苏连云港222005

出　　处：《水产科学》2022年第6期1029-1035,共7页Fisheries Science

基　　金：江苏省科技厅苏北科技发展计划项目(LYG-SZ202124);江苏省研究生和大学生科研与实践创新计划项目(KYCX18_2567,2021-033);连云港市花果山英才计划项目(KK20100);连云港521高层次人才培养工程项目(KK18027).

摘　　要：在水温(15±1)℃、盐度25下,将平均体质量为(21.2±4.2)g的单环刺螠置于50 cm×60 cm×60 cm塑料箱中,采用水生生物急性毒性试验方法,研究Pb(NO_(3))_(2)(0、1.00、2.66、7.08、18.84、50.12 mg/L)、CdCl_(2)(0、10.0、27.5、45.0、62.5、80.0 mg/L)、K_(2)Cr_(2)O_(7)(0、20、65、110、165、200 mg/L)和ZnSO_(4)(0、10、20、30、40、50、60、70 mg/L)4种重金属盐对单环刺螠在96 h内的急性毒性。试验结果显示:Pb(NO_(3))_(2)对单环刺螠的48、72、96 h半致死质量浓度为23.396、7.505、2.177 mg/L,CdCl_(2)为68.748、34.512、18.189 mg/L,K_(2)Cr_(2)O_(7)为139.005、50.691、24.035 mg/L,ZnSO_(4)为40.978、24.962、13.131 mg/L;Pb(NO_(3))_(2)、CdCl_(2)、K_(2)Cr_(2)O_(7)、ZnSO_(4)对单环刺螠的安全质量浓度分别为0.2177、1.8189、2.4962、1.3131 mg/L;其毒性依次为Pb(NO_(3))_(2)>ZnSO_(4)>CdCl_(2)>K_(2)Cr_(2)O_(7)。The echiuran worm Urechis unicinctus with body weight of(21.2±4.2)g in a 50 cm×60 cm×60 cm plastic box were exposed to various concentrations of four heavy metal salts Pb(NO_(3))_(2)(0,1.00,2.66,7.08,18.84,and 50.12 mg/L),CdCl_(2)(0,10.0,27.5,45.0,62.5 and 80.0 mg/L),K_(2)Cr_(2)O_(7)(0,20,65,110,165 and 200 mg/L)and ZnSO_(4)(0,10,20,30,40,50,60 and 70 mg/L)at water temperature of(15±1)℃and a salinity of 25 by acute toxicity experiment method to probe into acute toxicities of various concentrations of the four heavy metal salts to the echiuran worm.The LC_(50)of Pb(NO_(3))_(2)was shown to be 23.396 mg/L in 48 h,7.505 mg/L in 72 h,and 2.177 mg/L in 96 h,with safe concentration of 0.2177 mg/L.The LC_(50)of CdCl_(2)was found to be 68.748 mg/L in 48 h,34.512 mg/L in 72 h,and 18.189 mg/L in 96 h,with safe concentration of 1.8189 mg/L.The LC_(50)of K_(2)Cr_(2)O_(7)was 139.005 mg/L in 48 h,50.691 mg/L in 72 h,and 24.035 mg/L in 96 h,with safe concentration of 2.4962 mg/L.The LC_(50)of ZnSO_(4)was 40.978 mg/L in 48 h,24.962 mg/L in 72 h,and 13.131 mg/L in 96 h,with safe concentration of 1.3131 mg/L.The descending order of toxicity of different heavy metal salts was expressed as follows:Pb(NO_(3))_(2)>ZnSO_(4)>CdCl_(2)>K_(2)Cr_(2)O_(7).

关 键 词：单环刺螠 重金属盐 急性毒性 半致死质量浓度 安全质量浓度 

分 类 号：S948[农业科学—水产养殖]