水溞趋光抑制法快速监测重金属污染土壤的生态毒性研究

Rapid ecotoxicological biomonitore of heavy metal-polluted soil using Daphnia carinata phototaxis inhibition test

试验研究水趋光抑制法快速监测重金属污染土壤的生态毒性结果表明,水趋光指数与土壤Cd、Pb添加量(模拟污染浓度)呈极显著相关性。同一污染水平下土壤生物毒性表现为酸提液>水提液;同浓度重金属含量下土壤溶液生物毒性则表现为Cd>Pb,水提液+重金属>酸提液+重金属,远低于重金属在ISO标准水中的生物毒性。水趋光抑制法能综合、快速、灵敏地反映土壤重金属污染状况及土壤生态毒性,可为土壤健康质量的生物监测及评价提供理论依据。

The rapid biomonitore of ecotoxicity of heavy metal-polluted soil using Daphnia carinata phototaxis inhibition test was studied. It shows that the phototactic index of Daphnia is positively related with the cadmium and lead added to soil. The order of the ecotoxicity of heavy metal-polluted soil is the solution extracted by acid 〉 the solution extracted by water in the same pollution level, and is Cd 〉 Pb, the solution extracted by water ＋ heavy metal 〉 the solution extracted by acid ＋ heavy metal in the same content of heavy metal,much lower than that in ISO standardized solutions. It seems reasonable to suggest the sensitivity,efficiency and reliability for this rapid method in the monitor of soil ecotoxicity.