UV/Fenton净化甲苯气体的研究  

Study on degradation of gaseous toluene by UV/Fenton oxidation

作　　者：李天奇 陈茜茹 张杰[1] 郭巍巍[4] 万俊锋[1] 王岩[1] LI Tian-qi;CHEN Qian-ru;ZHANG Jie;GUO Wei-wei;WAN Jun-feng;WANG Yan(School of Ecology and Environment,Zhengzhou University,Zhengzhou 450001,China;State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization,Pingdingshan 467000,China;China Pingmei Shenma Energy and Chemicals Group Co.,Ltd.,Pingdingshan 467000,China;School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学生态与环境学院,河南郑州450001 [2]炼焦煤资源开发及综合利用国家重点实验室,河南平顶山467000 [3]中国平煤神马能源化工集团有限责任公司,河南平顶山467000 [4]郑州大学化工学院,河南郑州450001

出　　处：《应用化工》2021年第10期2625-2629,共5页Applied Chemical Industry

基　　金：国家自然科学基金(21706241);中国平煤神马集团炼焦煤资源开发及综合利用国家重点实验室开放基金资助课题(2017056A)。

摘　　要：挥发性有机物(VOCs)作为化工、印刷等多行业生产过程中极易产生的气体污染物亟需净化治理。实验选择甲苯作为一种典型的VOCs污染物,采用UV/Fenton法耦合湿法洗涤技术净化甲苯气体。考察了H_(2)O_(2)和Fe^(2+)浓度以及初始pH值对甲苯气体净化率的影响,分析了反应过程中甲苯、CO_(2)、H_(2)O_(2)、Fe^(2+)和·OH浓度的变化趋势。结果表明,在最佳反应条件:H2O2浓度为50 mmol/L,Fe^(2+)浓度为2.5 mmol/L,初始pH值为3,UV254 nm功率为6 W,甲苯气体质量浓度为670 mg/m^(3),流量为900 mL/min时,甲苯净化率和矿化率最高,分别达到72%和69%;UV照射促进了Fe^(3+)还原为Fe^(2+),产生大量·OH,显著地提升了甲苯气体的净化率和矿化率。Volatile organic compounds(VOCs)need to be treated urgently,which are easily produced in the production process of chemical and printing industries.The gaseous toluene,one of the typical VOCs pollutants,was treated by UV/Fenton coupled with wet scrubbing technology.The influences of concentrations of H_(2)O_(2),Fe^(2+)and initial pH on the degradation efficiency of toluene were investigated.The trends of toluene,CO_(2),H_(2)O_(2),Fe^(2+)and·OH concentrations were analyzed.The results show that the optimal condition was:H_(2)O_(2)50 mmol/L,Fe^(2+)2.5 mmol/L,initial pH=3,gaseous toluene concentration 670 mg/m^(3),flow rate 900 mL/min.In this condition,the degradation and mineralization efficiency of gaseous toluene reached 72%and 69%,respectively.UV irradiation can effectively promote the reduction from Fe^(3+)to Fe^(2+)and produce more·OH,which can effectively improve the degradation and mineralization efficiency of gaseous toluene.

关 键 词：甲苯 光芬顿 湿法洗涤 羟基自由基 铁循环 

分 类 号：TQ209[化学工程—有机化工] X511[环境科学与工程—环境工程]