葡萄糖对复合氯化聚氯乙烯纳滤膜性能的影响以及膜在染料/盐分离中的应用  

Effect of glucose on performance of composite chlorinated polyvinyl chloride nanofiltration membrane and membrane application in dye/salt fractionation

作　　者：张晨[1] 张琪 陈淑怡 蒋淑红 王军[1] 许士洪[1] ZHANG Chen;ZHANG Qi;CHEN Shuyi;JIANG Shuhong;WANG Jun;XU Shihong(College of Environmental Science and Engineering,Donghua University,Shanghai,China;Shanghai City Water Resources Development and Utilization National Engineering Center Co.,Ltd.,Shanghai,China)

机构地区：[1]东华大学环境科学与工程学院,上海 [2]上海城市水资源开发利用国家工程中心有限公司,上海

出　　处：《东华大学学报(自然科学版)》2025年第1期190-197,共8页Journal of Donghua University(Natural Science)

基　　金：中国博士后科学基金资助(2023M732171);上海市“超级博士后”资助(2022243)。

摘　　要：为研制适用于分离染料废水中染料和盐的新型复合纳滤膜,采用共沉积-界面聚合组合法制备复合氯化聚氯乙烯(CPVC)纳滤膜,在多巴胺(DA)/聚乙烯亚胺(PEI)共沉积体系中添加葡萄糖(GL),通过GL与均苯酰氯(TMC)生成聚酯(PET)对复合CPVC纳滤膜选择层的疏松程度进行调控。探讨GL和DA不同质量比对复合CPVC纳滤膜选择层微观结构、过滤性能及其对模拟活性黑5(RB5)染料废水处理效果的影响。结果表明:随GL与DA质量比的增加,纳滤膜结构变得疏松,纯水通量由4.46 L/(m^(2)·h)提高至6.61 L/(m^(2)·h),染料废水通量由3.72 L/(m^(2)·h)提升到5.23 L/(m^(2)·h),在有效截留染料分子的同时提高纯水通量和染料废水通量;当GL与DA质量比达7∶3时,复合CPVC纳滤膜对PEG800截留率和染料截留率均降到90%以下,过滤性能变差。因此GL与DA最佳质量比为6∶4,此时,复合CPVC纳滤膜的纯水通量和染料废水通量分别为6.61和5.23 L/(m^(2)·h),较未添加GL时分别提高48.21%和40.60%,PEG800和RB5截留率分别为92.58%和93.68%,盐截留率为1.90%。在设定的运行时间内染料废水通量和染料分子截留率均趋于稳定,表现出良好的稳定性。In order to develop new composite nanofiltration membranes that are suitable for separating dyes and salts from dyeing wastewater,glucose(GL)was added into the dopamine(DA)/polyethylenimine(PEI)aqueous solution of codeposition system in the process of preparing composite chlorinated poly(vinyl chloride)(CPVC)nanofiltration membranes by a combination of co-deposition and interfacial polymerization method.GL and Trimesoyl chloride(TMC)were polymerized to produce polyester(PET)to adjust the micro-structure of the CPVC nanofiltration membrane selective layer.The effects of different mass ratios of GL and DA on the micro-structure of selective layer,filtration performance and its influence on the simulating reactive black 5(RB5)dyeing wastewater were investigated.The outcomes demonstrated that the nanofiltration membrane structure got looser as GL/DA mass ratio increased,the pure water flux increased from 4.46 L/(m^(2)·h)to 6.61 L/(m^(2)·h),and the dye wastewater flux increased from 3.72 L/(m^(2)·h)to 5.23 L/(m^(2)·h).The flux of pure water and dye wastewater can be increased while effectively rejecting dye molecules.However,when GL/DA mass ratio reached 7∶3,the rejection rates of PEG800 and dye molecules by composite CPVC nanofiltration membranes dropped below 90%,and the filtration performance deteriorated.Therefore,the optimal ratio was 6∶4 and the pure water flux and dyeing wastewater flux respectively were 6.61 and 5.23 L/(m^(2)·h),which increased by 48.21%and 40.60%compared to those without adding GL.The rejection rates of PEG800 and RB5 were 92.58%and 93.68%,respectively,and the salt rejection rate was 1.90%.The dye wastewater flux and dye molecule rejection rate tend to be stable during the set running time,showing good stability.

关 键 词：葡萄糖 氯化聚氯乙烯 纳滤膜 染料/盐分离 共沉积-界面聚合组合法 模拟染料废水 

分 类 号：X703[环境科学与工程—环境工程]