摘要
对光降解非离子型表面活性剂 (十二烷基醇聚氧乙烯 (10 )醚 )胶束溶液中的 2 ,2′,4,4′ 四氯联苯进行了研究 .在紫外光(2 5 4nm)辐照下 ,四氯联苯的光解产物经检测确定为含氯较少的多氯联苯 :2 ,4,4′ 三氯联苯 ,4,4′ 二氯联苯、4 氯联苯、联苯及Cl-,并且 2 ,2′ ,4,4′ 四氯联苯与其产物之间存在很好的质量平衡 .以上结果表明 ,从邻位氯原子开始的逐步脱氯反应为所试四氯联苯的主要光解途径 .
Photodegradation of 2,2′,4,4′ tetrachlorobiphenyl dissolved in non ionic surfactant (polyoxyethylene (10) lauryl ether) micellar solutions was studied. Under UV irradiation at 254?nm, less chlorinated PCB congeners, 2,4,4′ trichlorobiphenyl, 4,4′ dichlorobiphenyl, 4 chlorobipehnyl, biphenyl, as well as chloride, were identified as the photoproducts of the tested PCB. Excellent mass balance existed between 2,2′,4,4′CB and its products. These results indicated that stepwise dechlorination initiated at ortho chlorine was the main photodegradation pathway of the tested PCB congener.
出处
《环境科学学报》
CAS
CSCD
北大核心
2000年第S1期110-114,共5页
Acta Scientiae Circumstantiae
基金
美国能源部基金!(DF FG0 2 97ER6 2 35 0 )
湖南省自然科学基金!(99JJY2 0 0 5 7)
湖南大学留学回国人员基金
