微波促进含Cr(VI)-H_2O_2体系降解甲基橙溶液的研究  

Degradation of methyl orange solution with microwave-irradiated Cr(VI)-H_2O_2 system

作　　者：刘作华[1] 杜军[1] 刘仁龙[1] 牟天明 陶长元[1] 

机构地区：[1]重庆大学化学化工学院 [2]重庆化医(控股)集团公司,重庆400010

出　　处：《环境工程学报》2007年第8期35-39,共5页Chinese Journal of Environmental Engineering

基　　金：国家创新研究群体科学基金项目(50621403);三峡库区生态环境教育部重点实验室访问学者基金(KLVF-2006-5)

摘　　要：研究了微波辐射下Cr(VI)-H2O2催化降解甲基橙溶液的行为,探索了微波功率、微波辐射时间、pH值、H2O2浓度、Cr(VI)等对甲基橙溶液脱色率和COD去除率的影响。研究结果表明,Cr(VI)-H2O2能形成类Fenton体系;微波辐射可提高H2O2产生羟基自由基(.OH)的效率。1000 mg/L的甲基橙溶液,在Cr(VI)浓度为10.0 mmol/L、pH值为2.5、H2O2浓度为20.0 mmol/L、微波功率为700W下加热2 m in,甲基橙溶液的脱色率为99.2%,COD去除率为82.8%。Catalytic degradation performance of methyl orange （MO） solution in microwave-irradiated Cr （VI）-H2O2 system was studied. Factors associated with decolorization and COD removal rates, such as microwave power, microwave irradiation time, pH value, dosages of H2O2 and Cr（VI） were investigated. Results indicated that Cr（VI）-H2O2 system was a kind of Fenton-like reagent. Microwave irradiation could improve the utilization efficiency of H2O2 to produce hydroxyl. Decolorization rate and COD removal rate of1000 mg/L MO solution were 99.2% and 82. 8% respectively under the conditions including microwave power 700 W for 2 min, pH 3, 10, 0 mmol/L Cr（VI） and 20.0 mmol/L H2O2.

关 键 词：微波 CR(VI) 甲基橙 类FENTON试剂 

分 类 号：X703[环境科学与工程—环境工程]