联合氧化法降解偶氮类染料大红4BE  

Degradation of DR4BE by Combined Oxidation

作　　者：杨庆 黄颖 YANG Qing;HUANG Ying(Qiannan Nationality Professional Technology College,Duyun 558022,Guizhou China;Institute of En-ironmental Science and Engineering,Guilin University of Technology,Guilin 541004,Guangxi China)

机构地区：[1]黔南民族职业技术学院,都匀558022 [2]桂林理工大学环境科学与工程学院,桂林541004

出　　处：《染料与染色》2018年第5期48-53,共6页Dyestuffs and Coloration

基　　金：环境保护公益性行业科研专项(201109001-08)

摘　　要：本研究采用联合氧化法降解大红4BE染料废水,考察了臭氧增溶、反应时间、p H、双氧水投加量及锰离子催化等各种实验条件对大红4BE降解的影响。结果表明:在保持臭氧流速为1 L·min-1的条件下,采用气液混合泵使臭氧与废水形成微纳米泡颗粒,臭氧在水中的溶解度大大提高了,大红4BE溶液快速降解脱色,此外,大红4BE在双氧水浓度为1 m L·L-1且p H值为3. 0的条件下降解效率最高;一定浓度的锰离子促进染料降解,而过量的锰离子会消耗部分臭氧而抑制大红4BE降解。大红4BE的苯环和偶氮结构在反应80 s后遭到破坏,可以被降解至最低为130μg·L-1,反应160 s之后大红4BE去除率达到99. 43%。In this study, the degradation of DR4BE dye wastewater was studied by combination of oxidation methods. The effects of va- rious conditions on the degradation of DR4BE, such as ozone solubilization, reaction time, pH, hydrogen peroxide dosage and the catal- ysis containing manganese ion were investigated. The results show that under the condition of keeping the ozone flow rate at 1 L · min^-1 , the gas-liquid mixing pump is used to form the micro-nano-bubble particles in the ozone and wastewater, the solubility of ozone in water is greatly improved, and the DR4BE solution is rapidly degraded and decolored. In addition, the degradation efficiency is highest under the condition of hydrogen peroxide concentration of 1 mL ~ L-j and pH 3. A certain concentration of manganese ion can promote dye degradation, but excess manganese ions consume some ozone and inhibit the degradation of DR4BE. The benzene ring and azo structure of DR4BE were destroyed after 80s reaction, and could be degraded to a minimum of 130 p.g· L^-1. After 160 s, the removal rate of DR4BE reached 99. 43%.

关 键 词：大红4BE 联合氧化 降解率 

分 类 号：TQ610.9[化学工程—精细化工]