| 天然水体有毒有机污染物毒性监测样品前处理 |
| 摘要点击 898 全文点击 1243 投稿时间：1998-12-02 |
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| 中文关键词 溶剂萃取 半渗透膜被动采样 发光菌 急性毒性 |
| 英文关键词 liquid-liquid extraction triolein-SPMD luminescent bacteria acute toxicity |
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| 中文摘要 |
| 应用水样直接测试、CH2Cl2 萃取和被动式半渗透膜采样技术(triolein-SPMD)富集洋河宣化至官厅水库沿线水样中污染物,并进行P.Phosphoreum T3 和Vibrio-qinghaiensis sp. Nov-Q67 发光菌急性毒性测试,分析探讨不同样品前处理方式对毒性测试结果的影响。结果显示由原河水样品直接进行的发光菌急性毒性测试会受水体中共存物质的干扰,将毒性掩盖,表现为刺激发光。采用CH2Cl2 萃取样品和triolein-SPMD富集样品后再进行毒性检验,宣化段和下游河段存在有机有毒污染物的毒性。用triolein-SPMD富集的样品,2 种发光菌检验结果有较好的相关性(EC50,t3= 1.47 EC50,Q67+63.16,r2=0.9848).本文结合triolein-SPMD的优点,推荐用该方法作为环境有毒有机污染物毒性监测的选择性样品前处理手段。 |
| 英文摘要 |
| The aim of this research is to verify influences of sample pretreatment on toxic assessment of organic pollutants.Luminescent bacteria P.phosphoreum T3 and Virbrio-qinghaiensis sp. Nov-Q67 were applied to assay the acute toxicity and river water pretreated with either liquid-liquid extraction using dichloromethane or sequestration by a triolein filled semi-permeable membrane device (triolein-SPMD).The results indicated clearly that substances that lead to stimulating effects influenced the toxic assay performed on original water. After extraction with CH2Cl2 or preconcentration with triolein SPMD,acute toxicity of organic pollutants in river water can be monitored.When triolein SPMD was applied,both toxic assays by P.phosphoreum T3 and Vibrio-qinghaiensis sp.Nov-Q67 gave an accordant result (EC50,t3=1.47 EC50,Q67+63.16,r2=0.9848).Based on the comparison,triolein-SPMD was recommended for sequestration of organic pollutants from river water for toxic assessment. |
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