超声-水合二氧化锰联合降解水中亚甲基蓝  

Degradation of Methylene blue in water by combining ultrasound and hydrous manganese dioxide

作　　者：杨威[1,2] 任南琪[3] 李圭白[3] 

机构地区：[1]哈尔滨工业大学环境科学与工程博士后流动站,哈尔滨150090 [2]哈尔滨商业大学环境工程系,哈尔滨150076 [3]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090

出　　处：《黑龙江大学自然科学学报》2014年第4期511-516,共6页Journal of Natural Science of Heilongjiang University

基　　金：国家自然科学基金资助项目(51121062);黑龙江省自然科学基金资助项目(E200818);黑龙江省博士后基金资助项目

摘　　要：以亚甲基蓝配制的模拟染料废水为研究对象,采用超声技术处理该模拟染料废水。探讨了pH值、超声功率强度、超声时间和温度等因素对该模拟染料废水去除率的影响。并通过L9(34)正交试验,得到了最佳的超声工艺条件。在此基础上,进一步考察了超声-水合二氧化锰联合方法对该模拟染料废水的处理效果。结果表明,超声波降解亚甲基蓝的最佳条件为:pH值为1.79,超声功率强度70%,超声温度为20℃,超声时间120 min。在最佳工艺条件下,单独超声技术对亚甲基蓝模拟废水的去除率不高。采用超声-水合二氧化锰联用技术,在较温和的超声条件下(pH=3.1),投加20 mg·L-1水合二氧化锰,超声30 min,可使亚甲基蓝去除率从9.19%上升到60.01%,较大地提高了亚甲基蓝的降解效率。The simulated dye wastewater prepared by Methylene blue was degradated by ultrasonic technique. The factors such as pH value,ultrasonic power,ultrasonic time and temperature were studied and the optimal parameters were obtained by L9（ 3^4） orthogonal experiment. In addition,the degradation efficiency of Methylene blue was studied by combining ultrasound and hydrous manganese dioxide.The results showed that the optimal parameters of Mehtylene blue degradation under ultrasonic technique were obtained as follows： 7the intensity of ultrasonic power was 70%,the pH value was 1. 79,the ultrasound time was 120 min and the temperature was 20 ℃. It is hard to get high degradation efficiency of Methylene blue by ultrasonic technique. However,the degradation rate of Methylene blue could rise from 9. 19% to 60. 01% after 30 min＇ultrasounic treatment combined with 20 mg·L^-1 dosage of hydrous MnO2 under the mild ultrasonic parameters（ pH = 3. 1）.

关 键 词：超声降解 亚甲基蓝 水合二氧化锰 

分 类 号：TB559[理学—物理]