作　　者： ; ; ;

机构地区： 湖南大学土木工程学院水工程与科学系

出　　处： 《湖南城市学院学报（自然科学版）》 2006年第2期57-59,共3页

摘　　要： 对改性环糊精溶液中的2,2′,4,4′-四氯联苯进行了研究,在紫外光(254nm)的照射下,2,2′,4,4′-四氯联苯的光降解产物经检测确定为含氯较少的2,4,4′-三氯联苯及氯离子．在降解初期,各时段试样的紫外-可见扫描曲线存在明显的蓝移效果．实验结果表明,从邻位氯原子开始的脱氯反应为所试四氯联苯的主要降解途径． Photodegradation of 2,2＇,4,4＇-tetrachlorobiphenyl dissolved in modified cyclodextrin solution was studied. Under UV irradiation at 254 nm, less chlorinated PCB,2,4,4＇-trichlorobiphenyl, as well as chloride, were identified as the photoproducts of the tested PCB. At the start of this photolysis, obviously, blue-shift was found from the UV-VIS scan curves of a series of sample . These results indicated that dechlorination initiated at ortho chlorine was the main photodegradation pathway of the tested PCB congener.

关 键 词： 多氯联苯 改性环糊精 紫外光 光降解

领　　域： [理学] [理学]