农药和重金属复合污染物对大型溞的毒性效应
投稿时间:2017-05-07      点此下载全文 HTML
引用本文:吴慧明,陈颖,胡婷婷,顾丹璐,王蒙岑,饶琼,刘训悦,等.农药和重金属复合污染物对大型溞的毒性效应[J].农药学学报,2017,19(6):716-722.
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作者单位E-mail
吴慧明 浙江农林大学 农业与食品学院, 浙江 临安 311300  
陈颖 浙江农林大学 农业与食品学院, 浙江 临安 311300  
胡婷婷 浙江农林大学 农业与食品学院, 浙江 临安 311300  
顾丹璐 浙江农林大学 农业与食品学院, 浙江 临安 311300  
王蒙岑 浙江大学 农药与环境毒理研究所, 杭州 310029  
饶琼 浙江农林大学 农业与食品学院, 浙江 临安 311300  
刘训悦 浙江农林大学 农业与食品学院, 浙江 临安 311300 lxyue1027.com@163.com 
基金项目:浙江省自然科学基金(LY15B070008);浙江农林大学科研发展基金(2015FR013);国家级大学生创新创业训练计划(201610341008);浙江农林大学学生科研训练项目(113-2013200004)
中文摘要:农药和重金属作为水环境中两类常见的污染物,其复合污染已经对水体生态和人类生存环境构成严重威胁。作者研究了3种常用农药(毒死蜱、三唑磷、氟虫腈)及2种常见重金属(铅、镉)对大型溞的急性毒性,同时采用五因素五水平二次通用旋转组合设计方案,研究了复合污染物体系对大型溞的联合毒性效应。结果表明:毒死蜱、三唑磷、氟虫腈、铅离子和镉离子对大型溞的48 h-EC50值分别为6.30、7.27、2.17、454.97和1 175.74 μg/L;5种污染物对大型溞的毒性效应贡献值依次为镉离子 > 三唑磷 > 氟虫腈 > 毒死蜱 > 铅离子;复合污染物对大型溞的毒性呈现出一定的相加效应;当水中毒死蜱质量浓度为0.81 μg/L、三唑磷为17.22 μg/L、氟虫腈为5.65 μg/L、铅离子为83.75 μg/L、镉离子为3 793.15 μg/L时,复合污染物毒性的理论协同效应最大。研究结果可为复合污染物风险评估提供参考。
中文关键词:大型溞  毒死蜱  三唑磷  氟虫腈  重金属  复合污染物  联合毒性  二次通用旋转组合设计
 
Combined toxicity of pesticide and heavy metal to Daphnia magna
Abstract:Pesticides and heavy metals are two common types of pollutants in aquatic environment. The combined pollution is noteworthy because they posed a serious threat to aqua ecology and living environment for human. Herein, the acute toxicities of 3 common pesticides (chlorpyrifos, triazophos and fipronil) and 2 common heavy metals (Pb and Cd) to Daphnia magna were evaluated. Their combined toxicities were also studied using five-factor quadratic general rotary unitized design. The 48 h-EC50 values of chlorpyrifos, triazophos, fipronil, Pb2+ and Cd2+ to D. magna were 6.30, 7.27, 2.17, 454.91 and 1 175.74 μg/L, respectively. The contribution of these five pollutions to combined toxicological effects following the order: Cd2+ > triazophos > fipronil > chlorpyrifos > Pb2+. Combined effects of five pollutants was observed on the survival of D. magna. Moreover, the maximum theoretical synergy appears when chlorpyrifos was 0.811 μg/L, triazophos concentration was 17.22 μg/L, fipronil was 5.65 μg/L, Pb2+ was 83.75 μg/L and Cd2+ was 3 793.15 μg/L. The data of this study can provide support for the risk assessment of composite pollutants.
Key words:Daphnia magna  chlorpyrifos  triazophos  fipronil  heavy metal  composite pollutants  combined toxicity  quadratic general rotary unitized design
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