研究论文
周祖飞,刘维屏.绿麦隆在水溶液中光降解动力学研究[J].环境科学学报,1999,19(1):68-71
绿麦隆在水溶液中光降解动力学研究
- Photolytic kinetics of chloritoluron in aqueous solution
- 摘要：以低功率紫外灯和荧光灯为光源对水溶液中的绿麦隆进行光降解,探讨了光解的影响因素。研究表明,绿麦隆在紫外光照下较易降解,其光解符合准一级动力学方程,反应速率常数为2.3×10-2min-1;在水环境中经长期光照会逐渐矿化为Cl-、CO2、NO-3等无机离子;运用GC/MS技术鉴定了绿麦隆的几种光解中间产物,异氰酸(3-氯-4 甲基)-苯酚酯是主要中间体,并推测了绿麦隆的光解反应历程。
- Abstract：The photolysis of chlorotoluron N′-(3 chloro-4 methylphenyl)-N,N-dimethylureal was investigated under irradiation of various wavelength in aqueous solution.The factors that influence the photolysis were also investigated.The degradation process follows a pseudo first order kinetic under ultraviolet light,and the rate constant was determined to be 2.3×10-2 min-1 .The herbicide was mineralized to CO2,Cl- and NO-3 after long term irradiation.Several photolysis intermediates were identified using GC/MS technique,and 3 chloro 4 methylphenyl isocyanide was recognized as a major reaction intermediate.A mechanism of the process was supposed.
- Key words：chlorotoluron photolysis mineralization
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