Research on degradation of 2, 4 dichlorophenol and pentachlorophenol in water by electron beam irradiation  

水中2,4-二氯苯酚和五氯苯酚电子束辐射降解的研究(英文)

作　　者：奥陆克[1] 周瑞敏[2] 俎建华[2] 顾建忠[2] 辛立辉[1] 

机构地区：[1]上海大学环境化学学院,上海200072 [2]上海大学射线应用研究所,上海201800

出　　处：《Journal of Southeast University(English Edition)》2004年第4期513-516,共4页东南大学学报（英文版）

基　　金：TheNationalNaturalScienceFoundationofChina(No.50303009).

摘　　要：Electron beam was successfully used for the degradation of 2,4-dichlorophenol (2,4-DCP) and pentachlorophenol (PCP) in water. The effects of radiation doses on substrate degradation and dechlorination of solutions with concentrations of 50 mg/L for both chlorophenols were investigated. The effects of initial concentration, pH and absence of oxygen on the degradation were also investigated. The concentrations of 2,4-DCP and PCP remaining in solution after irradiation were measured by high-performance liquid chromatograph (HPLC). The results showed that an increased radiation dose led to increased degradation of the chlorophenols and increased Cl- yields. In all cases, the rate of degradation was found to be higher than the corresponding inorganic chloride yield from the parent compound. Deoxygenation was also found to increase the rate of degradation of the chlorophenols in water while degradation under alkaline condition was lower than at low to neutral pH.用电子束辐射降解水中的2,4-二氯苯酚(2,4-DCP)和五氯苯酚(PCP),研究辐照剂量对溶液初始质量浓度各为50 mg／L的2种氯代苯酚辐射降解和去除有机氯的影响.同时研究了溶液不同的初始质量浓度、pH值和去氧状态等条件对辐射降解的影响.HPLC的测试结果表明:随着辐照剂量的增加.氯代苯酚的降解率增加,溶液中的氯离子增加,但辐照后溶液中仍有2,4-DCP和PCP的残余物.试验结果表明:有机氯辐射降解的速度要比无机氯生成的速度快得多;溶液的去氧也能加快氯代苯酚的降解;在酸性到中性条件下比碱性条件下更利于有机氯裂解.

关 键 词：CHROMATOGRAPHY DECHLORINATION Electron beams Environmental protection Irradiation WATER 

分 类 号：X703[环境科学与工程—环境工程]