响应面法优化电化学氧化处理氯苯废气的研究  

OPTIMIZATION OF ELECTROCHEMICAL OXIDATION FOR TREATING CHLOROBENZENE WASTE GAS BY RESPONSE SURFACE METHODOLOGY

作　　者：苗露元 姜野 颜廷春 沈玥希 王斯怡 权跃[1,3] MIAO Luyuan;JIANG Ye;YAN Tingchun;SHEN Yuexi;WANG Siyi;QUAN Yue(School of Agricultural,Yanbian University,Yanji 133002,China;Qiqihar Fularji District Ecological and Environmental Bureau,Qiqihar 161000,China;School of Geography and Ocean Sciences,Yanbian University,Hunchun 133300,China)

机构地区：[1]延边大学农学院,吉林延吉133002 [2]齐齐哈尔市富拉尔基生态环境局,黑龙江齐齐哈尔161000 [3]延边大学地理与海洋科学学院,吉林珲春133300

出　　处：《环境工程》2024年第8期97-104,共8页Environmental Engineering

基　　金：吉林省科技厅项目(202101089JC);吉林省教育厅项目(JJKH20230624KJ);国家自然科学基金项目(51968073)。

摘　　要：氯苯类化合物作为一类挥发性有机氯废气,具有疏水性、挥发性和生物毒性,难以从环境中去除。构建了电化学氧化体系,研究了单因素对氯苯废气的处理效果,利用响应面法研究了电流密度、极板间距和电解质浓度与废气去除率之间的关系,通过Design-Expert 10.0.1软件处理数据,优化反应条件。单因素实验结果表明:选用Ti/Ti4 O7为阳极,不锈钢网为阴极,0.15 mol/L NaCl为电解质,电流密度为10.0 mA/cm^(2),极板间距为4.0 cm,处理流量为0.40 L/min时,对浓度2.90 g/m^(3)氯苯废气的平均去除率RE为57.99%,平均去除容量EC可达20.18 g/(m^(3)·h),平均能耗Esp为190.2 kW·h/kg。响应面法分析结果表明:电流密度对去除率影响最大,电解质浓度影响最小;电解质浓度和电流密度双因子交互作用对去除率影响最显著;最优实验条件为0.149 mol/L NaCl,18.11 mA/cm^(2)电流密度,3.804 cm极板间距,此时去除率为66.43%;方差分析表明回归模型达到显著性水平,经验证该模型可应用到实际废气的电化学处理中。Chlorinated volatile organic compounds(Cl-VOCs)such as chlorobenzenes,are difficult to remove from the environment because they are hydrophobic,volatile,and biotoxic.In this study,an electrochemical oxidation system was constructed to investigate the effect of a single factor,current density,electrode distance,and electrolyte concentration on the removal of chlorobenzene gas,using response surface methodology(RSM),and a prediction model by Design-Expert 10.0.1 software was established to optimize the reaction condition.The results of one-factor experiments showed that when treating 2.90 g/m^(3)chlorobenzene gas with 0.40 L/min flow rate,Ti/Ti4 O7 as anode,stainless steel wire mesh as cathode,0.15 mol/L NaCl electrolyte,10.0 mA/cm^(2)current density and 4.0 cm electrode distance,and then the average removal efficiency(RE),efficiency capacity(EC)and energy consumption(Esp)was 57.99%,20.18 g/(m^(3)·h)and 190.2 kW·h/kg,respectively.The results of RSM showed that current density had significant effect on RE,while the electrolyte concentration had the least effect;electrolyte concentration and current density had the biggest interaction effect on RE;the optimal experimental conditions were as follows:0.149 mol/L NaCl,18.11 mA/cm^(2)current density,3.804 cm electrode distance,and under these conditions,the RE achieved 66.43%;it also showed that the regression model reached significant level,and the validation results was in agreement with the predicted results,which proved the feasibility of the model in treating actual waste gas.

关 键 词：响应面法 氯苯废气 电化学氧化 

分 类 号：X701[环境科学与工程—环境工程]