Wang Minxin, Li Fasheng, Han Mei, Zhu Shuquan, Luo Jinyu
School of Chemical and Environmental Engineering, China University of Mining and Technology of Beijing, Beijing 100083, China.
Huan Jing Ke Xue. 2003 Sep;24(5):125-30.
Propisochlor in water was irradiated at room temperature by a 400 W high pressure mercury lamp and sunlight, respectively. Influence of light and initiative concentration of propisochlor on the photolysis were studied. The results showed that under the irradiation of sunlight the photolysis fitted first order kinetics with only 5.5% degradation after one hour's irradiation in the quartz tube, that was a slow rate; while under the irradiation of high pressure mercury lamp the photolysis can be described by a double-chamber model, in which the degradation rate can reach 80.9% after 1 h. The higher the initiative concentration of propisochlor was, the slower the photolysis rate became, and the photolysis of propisochlor was influenced by the increasing photo-products. The six main photodegradation products were identified using GC-MS method. The aromatic ring was proved to be intact during the process. And the photolysis mechanism was then assumed on the basis of the photo-products detected.
分别用400W高压汞灯和阳光在室温下照射水中的异丙甲草胺。研究了光照和异丙甲草胺初始浓度对光解的影响。结果表明，在阳光照射下，光解符合一级动力学，在石英管中照射1小时后降解率仅为5.5%，降解速率较慢；而在高压汞灯照射下，光解可用双室模型描述，1小时后降解率可达80.9%。异丙甲草胺的初始浓度越高，光解速率越慢，且光解受光产物增加的影响。采用GC-MS法鉴定了6种主要光降解产物。在此过程中，芳环被证明是完整的。并根据检测到的光产物推测了光解机理。
