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phototransformation of nitrobenzene in the Songhua River:Kinetics and photoproduct analysis

Journal of Environmental Sciences 2008年第7期20卷 787-795页

作者： WANG, Aimin HU, Chun QU, Jiuhui YANG, Min LIU, Huijuan RU, Jia QI, Rong SUN, Jingfang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Nitrobenzene (NB) pollution of the Songhua River caused by an explosion at a petrochemical plant in Jilin City,Jilin Province, China,attracted public concern over the fate of NB in the *** one of the efforts to predict the fate of residual NB in the river,the kinetics and mechanism of phototransformation of NB in natural water from four sections of the Songhua River were *** was found that photodegradation of NB in water proceeded via pseudo-first-order reaction kinetics under simulated sol...

关键词： nitrobenzene phototransformation mechanism the Songhua River nitrate by-products

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Analysis and Characterization of Isopropyl Carbanilate Herbicide and Its Photoproducts

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American Journal of Analytical Chemistry 2011年第7期2卷 809-813页

作者： Mohammed Fehmi Zaater 不详

The phototransformation of the herbicide Isopropyl carbanilate (IPC) has been investigated under UV light. Irradiation of the herbicide at room temperature in aqueous and organic solvents such as hexane and methanol afforded new photo-products formed as a consequence of various processes including photo-Fries rearrangement, ring solvolysis, hydrolysis of the amide/carbamoyl and ester bonds, ring coupling and polymerization. The percentage remaining of the herbicide as a function of time was followed periodically starting from zero time up to three hours. Analyses were performed by GC-FID equipped with a semipolar glass column operated at 170?C. The rate of photo disappearance of IPC under controlled lab condition followed 1st order kinetics and found to be solvent dependent in the manner of non polar > polar solvents. The photo-products were successfully separated by GC and preparative TLC (Silica gel F-254) and were identified using either GC-MS and/or MS. Identifications were assigned on the bases of molecular ions, mass fragmentation pattern and whenever possible by comparison with the mass spectra of literature analogues.

关键词： phototransformation Isopropyl carbanilate Isopropyl-N-Phenylcarbamate Propham IPC and GC-MS

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