对硫磷的臭氧降解动力与机制

研究了臭氧降解对硫磷的机制、降解中间产物及影响因素。结果表明，对硫磷的臭氧降解是一个臭氧直接氧化为主和羟基自由基间接氧化为辅的氧化过程，并遵循假二级动力学。50mM离子清除剂叔丁醇使对硫磷的降解速率常数从0．09372min^-1降到0．06397min^-1，但溶液pH值对降解速率常数则无明显影响。通过GC／MS分析，确定了对氧磷为对硫磷的臭氧降解中间产物。较高的对硫磷起始浓度和离子清除剂的存在不利于对氧磷进一步降解。

Mechanism and Kinetics of Parathion Degradation by Ozone

The mechanism and kinetics and intermediates and affecting factors of are studied. The results discoveries that degrada via direct oxidation and hydroxyl radical indirect butyl alcohol decreases the the pH value of the solution parathion degradation by ozone tion of parathion by ozone fits tentatively pseuo - first order kinetics oxidation of ozone. The existence of iron removal reagent of tert - degradation rate of parathion from 0. 09372 per minute to 0. 0637 per minute. However, has no obvious affection on the degradation parameter. The intermediate is the paraoxon by GC/MS analysis, and the high initial concentration of the parathion and iron removal reagent will not help for further paraoxon degradation.