土壤吸附对敌草隆的斑马鱼胚胎毒性的影响  

Influence of soil sorption on the toxicity of diuron to zebrafish embryos

作　　者：王磊[1] 华丽娜[1] 陈甜甜[1] 林嘉尊[1] 郭可燕[1] 徐璐[1] 谢芬芬[1] 徐超[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310032

出　　处：《浙江工业大学学报》2008年第3期260-264,共5页Journal of Zhejiang University of Technology

基　　金：国家杰出青年科学基金资助项目(20688702);污染控制与资源化研究国家重点实验室开放基金资助项目(PCRRF07008)

摘　　要：研究了敌草隆在土壤-水体系中吸附前后对斑马鱼胚胎毒性的变化.结果表明:敌草隆在土壤中的吸附为分配过程,其logKoc=2.19.敌草隆对斑马鱼的胚胎发育有中等毒性.按连续72 h暴露后记录的胚胎孵化率,敌草隆溶液的EC50(50%效应质量浓度)为4.99 mg/L,同时伴有较强的致畸效应.土壤吸附作用降低了体系中敌草隆的液相质量浓度,导致按总质量浓度所得的敌草隆EC50增加为7.53 mg/L.而根据实测液相质量浓度,所得敌草隆EC50为4.75 mg/L,与敌草隆溶液所得对应值基本一致.因此认为土壤吸附能有效降低敌草隆对斑马鱼胚胎的毒性,吸附态敌草隆基本不显示其毒性作用.The influence of soil sorption of diuron on its toxicity to zebrafish embryos was investigated. Results showed that the sorption of diuron by soil occurred via a partition process, with a log Koc of 2.19. Diuron was moderately toxic to zebrafish embryos. From the observed hatching rates of embryos, the calculated EC50 value of diuron in soil-free solutions following a 72h exposure was 4. 99 mg/L, along with a strong teratogenesis. Soil sorption effectively reduced the solution-phase concentrations of diuron in soil-water systems. Based on the total concentrations of diuron in soil-water systems, soil sorption increased the EC50 value of diuron to 7.53 mg/L. In comparison, the solution-phase concentration-based ECs0 value of diuron was 4.75 mg/L, similar to the EC50 value obtained using soil-free solutions. It could be concluded that the soil sorption effectively reduced the toxicity of diuron to zebrafish embryos, and sorbed diuron virtually lost its toxicity.

关 键 词：吸附 毒性 敌草隆 斑马鱼胚胎 

分 类 号：X503.225[环境科学与工程—环境工程]