双极膜电渗析资源化巯基乙酸钠废水再生巯基乙酸的研究
收稿日期: 2024-02-04
网络出版日期: 2025-02-20
基金资助
国家自然科学基金项目(21976185);国家重点研发计划项目(2021YFB3801400);潍坊市科技发展计划项目(2021GX016);潍坊职业学院首届博士科研基金项目(潍职院教［2021］5号)
Research of regeneration of thioglycolic acid by bipolar membrane electrodialysis using sodium thioglycolate wastewater as resource
Received date: 2024-02-04
Online published: 2025-02-20
巯基乙酸钠是硫氨酯尾液的主要成分，因其高毒性、高盐、高化学需氧量的特点，使硫氨酯尾液成为一类极难处理的化工生产废水。通常采用萃取、过滤、酸化和蒸馏等复合工艺进行处理，但这种处理方法存在工艺复杂、成本高及可能产生二次污染等问题。为解决巯基乙酸钠废水资源化利用的难题，采用三隔室双极膜电渗析（Bipolar Membrane Electrodialysis Device，BMED）装置，以巯基乙酸钠转化率、电流效率、平均膜对电压及能耗等作为评价指标，考察操作反应时间、反应温度、电流密度、膜间距对BMED资源化巯基乙酸钠废水处理过程的影响。结果表明，在反应时间为75 min、电流密度为400 A/m2、反应温度为40 ℃、膜间距为50 μm的优化运行条件下，BMED的巯基乙酸钠转化率为98.32%，电流效率达到86.01%，生产能耗为93.54 kW·h/t。该研究结果可为巯基乙酸钠废水生产巯基乙酸提供新的工艺思路。
张莉 , 娄玉峰 , 张委 , 刘方旺 , 蓝靖 , 赵宗山 , 付昆明 . 双极膜电渗析资源化巯基乙酸钠废水再生巯基乙酸的研究[J]. 无机盐工业, 2025 , 57(2) : 120 -129 . DOI: 10.19964/j.issn.1006-4990.2024-0079
A lot of sodium thioglycolate as the main constituent of sulfur ammonia ester tail liquid is difficult to treat due to its high toxic，high salinity and high COD（Chemical Oxygen Demand） properties.The traditional disposal composite process of extraction-filtration-acidification-distillation exsits complex processes，high disposal costs and secondary pollution.In order to solve the resource utilization of sodium thioglycolate wastewater，the bipolar membrane electrodialysis device（BMED） with three-compartment configuration was used，which could convert salts into corresponding acids and bases.The effects of the reaction time，the reaction temperature，current density and plate thickness on the conversion efficiency，current efficiency，membrane voltage，energy consumption were investigated.The experiments showed that the optimum experimental conditions were 75 min，40 ℃，400 A/m2 and 50 μm.Under those conditions，the conversion rate of sodium thioglycolate was up to 98.32%，the current efficiency was 86.01%，and the energy consumption was 93.54 kW·h/t.The results can provide a reference for a new process idea for the production of thioglycolic acid from sodium thioglycolate wastewater in industrial production.
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