脱硫废液电渗析法再生用膜的研究

【作者】 赵玮；

【导师】 钟秦；

【作者基本信息】 南京理工大学 ， 化学工程， 2004， 硕士

【摘要】 采用苯乙烯（ST）和二乙烯苯（DVB）为原料，以浓硫酸为磺化剂，AgSO₄为磺化催化剂，制备用于脱硫废液NaHSO₃溶液再生的阳离子交换膜，并对膜的性能进行了测量。膜的含水率约29％；交换容量约2.09mol·kg^-1：膜面电阻约20Ω；膜电位约14.5mV，并由此计算了离子迁移数和膜的选择透过性。用自制的阳离子交换膜和市售的双极性离子交换膜组成膜对进行脱硫废液NaHSO₃溶液的电渗析再生实验，发现制膜时增大阳膜的磺化时间可以提高电渗析的效率；但磺化时间大于8h后，电渗析效率增长很小，并且膜有损坏迹象。作为对比，用购买的商品膜重复了以上实验过程。发现自制膜的电性能接近和超过商品膜，在外加电压31V，NaHSO₃溶液1mmol／L条件下，约0.5h后采用自制膜的系统电渗析效率超过商品膜。更多还原

【Abstract】 One type of cation exchange membranes was made for the purpuse of electrodialysis process ,which regenerate NaHSO3 waste water desulfurized by membrane process. The cation exchange membrane was prepared by sulfonation of a preformed polymer film. The film of polystyrene(PS) and divinybenzene(DVB) used oil of vitriol as sulfonate reagent,Ag2SO4 as catalyst. The average water content of the membrane was 29%.The cation exchange capacity was about 2.09 mol kg-1.The membrane conductance was around 20 cm2, equilibrated in 0.1molL-1 NaCl solution. The membrane potential reached up to 14.5mV,equilibrated in 0.1molL-1Vo.2molL-1 KCl solution. Then calculated the ion transport number and permselectivity of the membrane by it. Experiments were carried out to regenerate NaHSO3 waste water by electrodialysis using this home-made membrane Found that increase the sulfonation time can enhance the efficiency of the electrodialysis process; but if sulfonation time exceeded 8 hour, the enhancement was very minute, and the membrane began to destroyed. Use bought membranes repeated the experiments above to compare with, then found the electro-performance of the home-made membranes was close to, even exceed bought membranes. In the condition of 31 V voltage,1mmol L-1 NaHSO3 solution, after 0.5 hour electrodialysis, the efficiency of home-made memebranes began to exceed that of bought membrane.更多还原