微波强化Fenton氧化处理邻氨基苯甲酸废水  

Experimental Study on Treatment of o-Aminobenzoic Acid Wastewater by Microwave-Assisted Fenton Oxidation Process

作　　者：张丽[1,2] 朱晓东[1] 张燕峰[1] 李兆龙[2] 

机构地区：[1]南京大学环境学院,污染控制与资源化国家重点实验室,江苏南京210093 [2]南京钟山职业技术学院,江苏南京210049

出　　处：《环境科学研究》2009年第5期516-520,共5页Research of Environmental Sciences

基　　金：江苏省省级环境保护科技项目(2007年度)

摘　　要：设计了微波强化Fenton氧化处理系统,以难降解的邻氨基苯甲酸生产废水为研究对象,考察初始pH,微波辐射时间,微波辐射功率,ρ(H2O2),ρ(Fe2+)及催化剂投加量对降解效果的影响,并分析了各影响因子的作用机理和综合反应机理,确定了应用该系统的关键控制步骤.结果表明,采用微波强化Fenton氧化处理邻氨基苯甲酸生产废水的最佳操作条件:pH为3,微波辐射时间为6 min,微波辐射功率为850 W,ρ(H2O2)为50 mg/L,ρ(Fe2+)为10 mg/L,催化剂投加量为60 g/L.最佳操作条件下,出水中CODCr,色度和邻氨基苯甲酸的去除率分别为80%,85%和90%.水处理费用约为4.2元/t.An experimental system of microwave-assisted Fenton oxidation was designed and tested. Using recalcitrant wastewater from o- Aminobenzoie production as the treatment object, the influence of initial pH, microwave radiation time, H2O2 mass concentration, Fe2 ＋ mass concentration, catalyst dosage, and microwave power on degradation effect were investigated. The operating conditions of microwave-assisted Fenton oxidation were improved and optimized. Furthermore, mechanisms affecting factors in wastewater were analyzed, and the key and controlling steps of reactions were suggested. The optimal operating conditions tested were as following： pH = 3, irradiation time = 6 rain, dosage of Fenton was H2O2 = 50 mg/L, Fe^2＋ = 10 mg/L, dosage of catalyst = 60 g/L, microwave power = 850 W. Under these conditions, the removal rate reached 85% for CODcr, 85% for color and 90% for o-Aminbenzoic. The treatment operating cost was about 4.2 yuan per ton of wastewater.

关 键 词：邻氨基苯甲酸废水 微波强化 FENTON 氧化 

分 类 号：X703.1[环境科学与工程—环境工程]