微波无极紫外灯光降解罗丹明B水溶液  

Photo-degradation of Rhodamine B Dye Using a Microwave Electrodeless UV Lamp(MWUVL)

作　　者：顾丁红[1] 黄丽[1] 邵春雷[1] 房豪杰[1] 张仁熙[1] 侯惠奇[1] 

机构地区：[1]复旦大学环境科学研究所,上海200433

出　　处：《复旦学报（自然科学版）》2006年第6期726-731,共6页Journal of Fudan University：Natural Science

基　　金：上海市科委基金项目(042312044)

摘　　要：自制微波无极紫外灯(MWUVL)发出的185 nm UV占总辐射量的12%,是普通低压汞灯的1.7倍左右.利用自制MWUVL研究了罗丹明B(RhB)水溶液的光降解.研究表明,酸性条件有利于RhB的光降解;ρ初始≥60mg.L-1的RhB溶液在光降解过程中有沉淀析出;pH=4.0的100 mg.L-1RhB溶液光照75 m in后,析出的沉淀质量接近初始RhB质量的一半,脱色率达99.4%,CODC r下降77.4%;RhB的降解主要是185 nm直接光解和OH自由基氧化的共同作用的结果.The photo-degradation of organic dye Rhodamine B(RhB) solution was studied using a novel microwave electrodeless UV lamp(MWUVL).The 185 nm intensity of the MWUVL amounts to 12% of the total UV irradiation,(1.7) times as high as that of the conventional low-pressure mercury lamp.Acidic condition was preferred for the degradation of RhB.Precipitate was found to be generated during RhB degradation when the initial concentration of RhB solution was higher than 60 mg·L^(-1).For 100 mg·L^(-1) RhB at pH 4.0,the ma...

关 键 词：微波无极紫外灯 185nm 罗丹明B 直接光解 

分 类 号：X703[环境科学与工程—环境工程]