膜科学与技术

离子交换树脂预处理缓解反渗透膜结垢的研究

作者：梁正，燕梦莹，李隽，黄满红

单位：东华大学环境科学与工程学院，生态纺织教育部重点实验室，上海201620

关键词：离子交换树脂；反渗透；印染废水；膜结垢

出版年,卷(期):页码： 2022,42(5):146-153

摘要：

采用离子交换树脂进行预处理减轻反渗透的膜结垢，通过优化离子交换树脂处理工艺，研究了预处理后的废水对反渗透膜结垢的影响，利用扫描电子显微镜（SEM)、傅里叶变换红外光谱(FTIR)等表征手段分析其影响反渗透膜结垢的机理。结果表明，离子交换树脂预处理处理对二沉池出水的硬度的去除率可达98%以上，碱性条件有利于离子交换树脂对重金属Sb的去除，离子交换树脂浓度为200 g/L时，对Ca、Mg和Sb元素的去除率分别可达98.31%、99.46%和66.76%。经过离子交换树脂处理后的反渗透通量有所提升，初始通量从32.53 L·m-2·h-1提升到39.57 L·m-2·h-1，提升了21.65%。SEM、FTIR等表征结果表明，离子交换树脂对Ca、Mg的有效去除降低了反渗透膜的结垢，研究结果可为印染废水反渗透深度处理提供技术参考。

The ion exchange resin was used for pretreatment to reduce membrane scaling in reverse osmosis. The effect of pretreated wastewater on reverse osmosis membrane scaling was studied by optimizing the ion exchange resin treatment process, and the mechanism of its effect on reverse osmosis membrane scaling was analyzed by means of scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR) and other characterization methods. The results showed that the ion exchange resin pretreatment treatment could remove more than 98% of the hardness of the secondary sedimentation tank effluent, and the alkaline conditions were favorable to the removal of heavy metal Sb by ion exchange resin, and the removal efficiency of Ca, Mg and Sb elements could reach 98.31%, 99.46% and 66.76%, respectively, when the ion exchange resin concentration was 200 g/L. The initial flux increased from 32.53 L·m-2·h-1 to 39.57 L·m-2·h-1 after ion exchange resin treatment. This study can provide technical reference for the deep treatment of printing and dyeing waste water by reverse osmosis.

梁正（1996-），男，山东威海人，硕士研究生，研究方向：反渗透的组合工艺及其应用。E-mail: exw312910@163.com

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