【摘要】 研究了臭氧降解甲基对硫磷的效果、机理 ,鉴定了反应中间产物。实验表明臭氧能有效降解甲基对硫磷。通过分别添加自由基抑制剂碳酸氢钠和叔丁醇 ,初步探讨了反应机理 ,在自由基抑制剂存在时 ,甲基对硫磷的降解率明显降低 ,表明甲基对硫磷的降解遵循自由基机理。对处理过的水样采用GC ,HPLC ,UV检测 ,结果表明有未知中间产物生成 ,同时发现降解产物的极性增强。通过GC -MS检测鉴定了此未知物质的结构 ,证实臭氧处理不足时会有毒性中间产物生成。更多还原

【Abstract】 The effectiveness and mechanism of ozone reaction with the variation of residual parathion-methyl in solution were studied. Also, by-product was determined.The results indicate that parathion-methyl can be effectively degraded by ozone in the experimental condition. In addition, in the presence of radical scavengers such as tert-butanol and bicarbonate,lower reductions of the degradation rate of parathion-methyl were observed.These results show that hydroxyl radical play a more important role than ozone molecular in reaction.It is believed that the degradation of parathion-methyl by ozone follows a radical mechanism.By-product was detected by GC,HPLC,UV.The unknown intermediate was identified by GC-MS, showing that other organic substances that do harm to the human body would be produced in insufficient treatment with ozone. Meanwhile, more polar products were found via HPLC.更多还原