Cu~(2+)、Zn~(2+)、Cd~(2+)、Cr~(6+)和Mn~(2+)对萼花臂尾轮虫联合急性毒性研究Combined Acute Toxicities of Cu~(2+),Zn~(2+),Cd~(2+),Cr~(6+),and Mn~(2+) to Freshwater Rotifer Brachionus calyciflorus Pallas
徐晓平;席贻龙;黄林;
摘要(Abstract)：
为探究重金属复合污染对轮虫的毒性影响,以萼花臂尾轮虫为受试动物,选择Cu~(2+)、Zn~(2+)、Cd~(2+)、Cr6+和Mn~(2+)等5种重金属,采用水生毒理联合效应相加指数法开展了其24 h联合急性毒性作用的评价研究。结果显示,Cu~(2+)、Zn~(2+)、Cd~(2+)、Cr6+和Mn~(2+)等5种重金属对萼花臂尾轮虫24 h半数致死浓度分别为:0.00616 mg·L~(-1),12.62 mg·L-1,2.89 mg·L-1,17.29 mg·L-1和67.32 mg·L-1。联合急性毒性实验结果显示,等毒性配比的Cu~(2+)-Cr6+(0.00385-10.806 mg·L-1)和等浓度配比的Cu~(2+)-Zn~(2+)(0.0199-0.0199 mg·L-1)、Cu~(2+)-Cd~(2+)(0.0181-0.0181 mg·L-1)、Cu~(2+)-Cr6+(0.0118-0.0118 mg·L~(-1))、Zn~(2+)-Cd~(2+)(3.475-3.475 mg·L-1)二元联合测试液的作用结果显示为拮抗效应,其余二元联合测试液的作用结果则均显示是协同效应。等毒性配比的Cu~(2+)-Cr~(6+)-Mn~(2+)(0.00210-5.902-22.981 mg·L-1)和等浓度配比的Cu~(2+)-Cd~(2+)-Mn~(2+)(0.00727-0.00727-0.00727 mg·L-1)三元联合测试液的作用结果显示为拮抗效应,其余三元联合测试液的作用结果则均显示是协同效应。等浓度配比的Cu~(2+)-Zn~(2+)-Cd~(2+)-Cr6+(0.00907-0.00907-0.00907-0.00907 mg·L-1)、Cu~(2+)-Zn~(2+)-Cd~(2+)-Mn~(2+)(0.00898-0.00898-0.00898-0.00898 mg·L~(-1))、Cu~(2+)-Zn~(2+)-Cr6+-Mn~(2+)(0.00819-0.00819-0.00819-0.00819 mg·L~(-1))四元联合测试液的作用结果显示为拮抗效应,其余四元联合测试液的作用结果的则均显示是协同效应。Cu~(2+)-Zn~(2+)-Cd~(2+)-Cr~(6+)-Mn~(2+)等毒性(0.00074-1.520-0.348-2.082-8.107 mg·L~(-1))和等浓度(0.00582-0.00582-0.00582-0.00582-0.00582 mg·L-1)配比的五元联合测试液作用结果均显示是协同效应。
关键词(KeyWords)： 重金属;萼花臂尾轮虫;联合毒性;急性毒性
基金项目(Foundation): 国家自然科学基金(31470015);; 安徽省高校生物环境与生态安全省级重点实验室专项基金(2004sys003);; 安徽省高等学校自然科学研究重点项目(KJ2016A063)
作者(Author): 徐晓平;席贻龙;黄林;
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