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废弃农药厂污染场地浅层地下水生态毒性诊断研究 被引量:13

Ecology Toxicity Diagnostic Research on an Abandoned Pesticide Factory Contaminated Site of Shallow Groundwater
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摘要 选择大型溞、斜生栅藻、发光菌为试验生物,对某废弃农药厂污染场地4个不同区域土壤剖面浅层地下水编号为CP01、CP02、CP03、CP04的4种水样进行了急性毒性试验,同时对水样进行了化学分析。结果表明,4种水样对大型溞的24h-EC50分别为0.29%、5.12%、0.83%、1.99%;对斜生栅藻的96h-EC50分别为11.04%、50.44%、12.21%、41.66%;对费舍尔弧菌的发光抑制率分别为95%、66%、88%、75%。化学检测结果表明,CP01中的主要污染物为苯系物与少量烷烃、烯烃类多种物质,CP02中的污染物质只有少量二氯甲烷与1,2-二氯乙烷两种物质,CP03、CP04中的主要污染物为苯系物与烷烃多种物质。毒性试验结果与化学检测结果具有较好的相关性,3种试验生物的毒性效应结果相一致。该研究方法简单快速,可以用于污染场地水样污染毒性诊断,快速筛选出敏感区域,同时提供污染物质的联合毒性基础数据,为场地进一步危害识别与风险评估提供依据。 Daphnia magna,Scenedesnus obliquus,Vibrio fischeri were chosen as experiment materials for acute biotoxicity tests for the contaminated shallow groundwater of a former pesticide factory site.The samples were analyzed qualitatively and quantitatively.The results showed that the 24 h-EC50 for the Daphnia magna of groundwater sample CP01,CP02,CP03,CP04 was 0.29%,5.12%,0.83%,and 1.99%.The 96 h-EC50 for the Scenedesnus obliquus was 50.44%,11.03%,12.21% and 41.66%.The Vibrio fischeri test results showed that the light-emitting loss of CP01,CP02,CP03,CP04 was 95%,88%,75%,and 66%.Chemical testing results found benzenes,olefins and alkane in the contaminated groundwater.The bio-toxicity test results exhibited a good correlation with the chemical test results.The toxicity effects of three kinds of experimental materials are consistent.This research method is simple,rapid,and can be used for water toxicity screening and rapid diagnosis of toxic pollutants at contaminated sites.Preliminary data can be obtained for estimating the joint toxicity,which will benefit hazard identification and risk assessment.
出处 《农业环境科学学报》 CAS CSCD 北大核心 2011年第1期42-48,共7页 Journal of Agro-Environment Science
基金 国家863重大项目"农药类污染场地土壤修复技术设备与示范" 公益性环保专项"污染场地快速诊断试验方法研究"(200809100)
关键词 污染场地 大型溞 斜生栅藻 费舍尔弧菌 联合毒性 污染诊断 风险评估 contaminated sites Daphnia magna Scenedesnus obliquus Vibrio fischeri joint toxicity pollution diagnosis risk assessment
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