【摘要】 报道了凤眼莲修复水溶液中乙硫磷、三氯杀螨醇和三氟氯氰菊酯的效果及主要机理 .研究结果表明 ,10～ 11g凤眼莲可将 2 5 0 m L的 1mg/ L的乙硫磷、三氯杀螨醇和三氟氯氰菊酯消解速度分别提高 2 83.33%、10 6 .6 4%和 36 2 .2 3% % .其修复机理主要是凤眼莲吸收农药后在体内积累或进一步降解 ,贡献率分别达 6 9.2 8%、37.77%和 6 3.0 6 % % ,而其中乙硫磷和三氯杀螨醇消解量的约 6 0 %由积累作用造成 ,积累对三氟氯氰菊酯的消解也起了约 30 %的作用 .微生物的降解贡献率相对较小 ,分别占乙硫磷、三氯杀螨醇和三氟氯氰菊酯消解率的 19.72 %、13.93%和 15 .30 % .更多还原

【Abstract】 The effectiveness of the phytoremediation of ethion, dicofol and cyhalothrin by water hyacinth ( Eichhornia crassipes Solms) was studied. In 250mL of nutrition solution containing one of the above named pesticides at a concentration of 1 mg/L and a living water hyacinth plant weighing about 10 11 g·FW, it was found that the dissipation rate constants of these pesticides were raised by 283%,107%, and 362% respectively compared with those in a solution of same concentration but without water hyacinth plant. According to the amounts of pesticides accumulated in water hyacinth plant and that disappeared from the culture solution, the contributions of water hyacinth and microorganism to the dissipation of ethion, dicofol and cyhalothrin in a 10 days period were 69%, 38% and 63%, and 20%, 14% and 15%, respectively.更多还原