期刊名称：Pakistan Journal of Analytical & Environmental Chemistry
印刷版ISSN：1996-918X
电子版ISSN：2221-5255
出版年度：2007
卷号：8
期号：2
页码：1-7
语种：English
出版社：National Centre of Excellence in Analytical Chemsitry
摘要：Contamination by chlorophenols of surface water and groundwater is an emerging issue in environmental science and engineering. After their usage as pesticide,herbicide and disinfectant,these organic compounds subsequently enter the aquatic environment through a number of routes. Some of the chlorophenols are slightly biodegradable,while others are more persistent and mobile in the aquatic environment especially chlorophenols. Gamma radiolytic degradation is one of advance oxidation process that has been thought to be one of the promising treatments to deal with this problem. This radiolytic study was carried out in methanolic 4-CP (4-chlorophenol) samples. Among several factors effecting radiolytic degradation of 4-CP,dose and concentration are important that were evaluated under atmospheric conditions. A degradation yield (G ñvalue) for 4- CP of 0.38 and 1.35 was achieved in 20 and 100mg/dm 3 solution. It was observed that degradation yield decreases with increasing 4-CP concentration. Gamma radiolysis produce free radicals in solvent which further react with 4-CP molecules to generate different products. The identification of degradation products was proposed using HPLC and GC-MS..
关键词：Gamma radiolysis;degradation;4-CP (4-CP);Degradation ef iciency;Dose;Mechanism
