操作电压对双极膜电渗析回收丙烯酸丁酯废水中有机酸的影响  

Effect of Operating Voltage on Organic Acid Recovery from Butyl-acrylate Wastewater with Bipolar Membrane Electrodialysis

作　　者：胡田[1,2,3] 宋玉栋[2,3] 陈叶[4] 王百党[4] 周岳溪[1,2,3] 李杰[1] 王亚娥[1] 崔俊华[4] 

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070 [2]中国环境科学研究院水污染控制技术研究中心,北京100012 [3]环境基准与风险评估国家重点实验室,中国环境科学研究院,北京100012 [4]河北工程大学城市建设学院,河北邯郸056038

出　　处：《环境工程技术学报》2014年第6期456-461,共6页Journal of Environmental Engineering Technology

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07201-005)

摘　　要：采用具有三隔室重复单元的电渗析中试装置从丙烯酸丁酯废水中回收有机酸,考察了操作电压对转化过程的影响。结果表明,操作电压对装置的处理能力、能耗和回收有机酸浓度均具有重要影响。随着操作电压从50V增加到100 V,平均电流密度从16.91 mA/cm2线性增加到55.22 mA/cm2,电渗析时间显著缩短;生产单位有机酸的能耗从0.10 kW·h/mol线性增加到0.20 kW·h/mol。操作电压从50 V提高到100 V时,伴随有机酸根迁移的水量增加,而伴随钠离子迁移的水量减少,使50 V下获得的有机酸浓度较高,而NaOH浓度较低。A three-chambered bipolar membrane electrodialysis pilot module was used to recover organic acid from butyl-acrylate wastewater. Influence of operation voltage on the process was investigated. It was indicated that the operation voltage had significant effects on electrodialysis capacity,energy consumption and recovered organic acid concentration of the module. As the operation voltage increased from 50 V to 100 V,average current density increased from 16. 91 mA/cm^2 to 55. 22 mA/cm^2 linearly, and the electrodialysis duration was shortened significantly. Energy consumption for organic acid production increased from 0. 10 kW·h/mol to 0. 20 kW·h/mol linearly. As the operation voltage increased from 50 V to 100 V,water migrating with organic acid anion increased while that migrating with sodium cation decreased. As a result,higher organic acid concentration and lower NaOH concentration were achieved at operation voltage of 50 V.

关 键 词：双极膜电渗析 中试 丙烯酸 对甲基苯磺酸 丙烯酸丁酯废水 

分 类 号：X703[环境科学与工程—环境工程]