过氧化氢降解有机磷农药的研究Ⅲ.去除残留农药的研究

Studies on the degradation of organophosphorus pesticides by hydrogen peroxide Ⅲ.Removal of residues on vegetables

摘要: 研究了过氧化氢降解田间农药，并对过氧化氢降解农药的室内生物活性进行测定。结果表明，经H2O2处理后田问农药残留量明显下降，经10mL／L H2O2处理1d后，甲胺磷和毒死蜱的残留量下降率分别为10．57％和16．95％，处理3d后残留量下降率分别为39．62％和30．49％，而处理7d后则为45．21％和64．05％．室内生物测定表明，H2O2溶液浸泡处理60min内，对植物表面的甲胺磷、毒死蜱和久效磷的毒力有微弱降低作用。

Abstract: The efficiency of removal of pesticide residues on vegetables was evaluated by the toxicity bioassay. The results showed that treatment with H2O2 at concentration of 10 mL/L for 1 day, the residue of methami-dophos and chlorpyrifos decreased 10.57% and 16.95%, and the degradation rates were 39.62% and 30.49% at 3 days after treatment, and 7 days later, the degradation rates were 45.21% and 64.05% . The toxicity bioassay of the pesticides on the surface of plant leaf against 3rd-instar larvae of Spodoptera litura showed that treatment with H2O2 for 60 min was able to decrease the toxicity of methamidophos, chlorpyrifos, monocrotophos to a certain extent.