双极膜电渗析法回收硫酸与氢氧化钠  

Recovery of Sulfuric Acid and Sodium Hydroxide by Bipolar Membrane Electrodialysis Technology

作　　者：江杰 吕明智 陈日耀[1,2] 刘耀兴 JIANG Jie;L Mingzhi;CHEN Riyao;LIU Yaoxing(College of Environmental and Resource Sciences,College of Carbon Neutral Modern Industry,Fujian Normal University,Fuzhou Fujian 350117,China;Fujian Key Laboratory of Pollution Control&Resource Reuse,Fuzhou Fujian 350117,China)

机构地区：[1]福建师范大学环境与资源学院、碳中和现代产业学院,福建福州350117 [2]福建省污染控制与资源循环利用重点实验室,福建福州350117

出　　处：《莆田学院学报》2025年第2期93-101,共9页Journal of putian University

基　　金：国家自然科学基金资助项目(21507069);福建省自然科学基金资助项目(2021J01194)。

摘　　要：利用双极膜电渗析(BMED)法从沉淀水合二氧化硅制备过程产生的硫酸钠(Na_(2)SO_(4))废水中以硫酸(H_(2)SO_(4))和氢氧化钠(NaOH)的形式回收SO_(4)^(2-)与Na^(+)。考察了电流密度、循环速率、BMED处理单元数对电压、酸(碱)室pH、SO_(4)^(2-)与Na^(+)回收率、单位能耗和电流效率等的影响,结果表明最佳电流密度、循环速率分别为70 mA·cm^(-2)和80 mL·min^(-1)。在这最佳实验条件下,SO_(4)^(2-)与Na^(+)的回收率分别为94.2%和71.2%,单位能耗分别为3.10和1.80 kW·h·mol^(-1),电流效率分别为52.4%和50.5%。相对于1处理单元,2处理单元能有效降低单位能耗而不影响处理效果。因此,BMED法是一种处理Na_(2)SO_(4)废水的有效方法。Bipolar membrane electrodialysis(BMED)was used to recover SO_(4)^(2-)and Na^(+)from sodium sulfate(Na_(2)SO_(4))wastewater generated in the preparation process of precipitated hydrated silica.The effects of current density,circulation rate,and number of BMED processing units to wastewater compartment solution on BMED voltage,SO_(4)^(2-)recovery ratio,Na^(+)recovery ratio,specific energy consumption and current efficiency were investigated,and the optimal current density and circulation rate were 70 mA·cm^(-2)and 80 mL·min^(-1),respectively.The recoveries of SO_(4)^(2-)and Na^(+)were 94.2%and 71.2%,respectively.The specific energy consumption was 3.10 and 1.80 kW·h·mol^(-1),the current efficiency was 52.4%and 50.5%,respectively.Compared with 1 processing unit,2 processing units can effectively reduce the unit energy consumption without affecting the treatment effect.Therefore,BMED is an effective method for treating Na_(2)SO_(4)wastewater.

关 键 词：双极膜电渗析 硫酸钠废水 硫酸 氢氧化钠 回收 

分 类 号：X781[环境科学与工程—环境工程]