膜科学与技术

高浓度含盐蔗糖溶液的纳滤分离实验研究

作者：唐元晖¹，王迪¹，杨忠霖¹，燕志琴²，于漪¹

单位： 1)中国矿业大学（北京）化学与环境工程学院，北京，100083 2)中国科协学会服务中心，100081

关键词：蔗糖; 一二价盐; 分离; 纳滤; 废水处理

出版年,卷(期):页码： 2018,38(4):86-92

摘要：

为探讨运用纳滤（NF）过程实现高浓度二糖和1、2价无机盐分离的可能性，本文选用商业纳滤膜NF270对高浓度蔗糖与1、2价盐离子的单组分和混合组分溶液开展了分离实验研究。首先，本文研究了物料浓度、操作压力等因素对高浓度蔗糖与盐的单组分体系分离效果的影响，明确了NF270膜对不同的单组分溶液的透过和截留性能；其次探究了NF270纳滤膜对高浓度蔗糖/NaCl和蔗糖/Na2SO4混合体系的分离效果。实验结果说明操作压力的降低和盐浓度的升高均能显著降低混合溶液的溶剂透过通量，且高浓度盐离子的存在会影响蔗糖截留率，而蔗糖对无机盐截留率影响不明显。在高操作压力下，NF270膜可实现对高浓度蔗糖/NaCl混合体系的高效分离。

In order to explore the possibility of using nanofiltration (NF) membrane to separate the high concentrated sugar and chloride, in this paper, a commercial NF membrane (named as NF270) was employed in the permeation of the high concentrated sucrose and the single or the binary salt solutions of NaCl and Na2SO4. Firstly, the influences of the parameters including the operating pressure and the solute concentration on the separation performance were investigated to determine basic permeation and the rejection performance of the NF270 membrane for the single solution. Then for high concentratedsucrose and salt solutions, the results have shown that the flux increased with the increase of operating pressure and decrease of salt concentration. In addition, an increase in the salt concentration generally decreased the rejection to the sucrose,while the sucrose has a slight effecton the rejection to the salts.On a higher operating pressure,an efficient selective separation of chloride and the sucrose could be achieved by a NF270 membrane.

[作者简介]唐元晖，1986年出生，女，甘肃省兰州市人，博士后，从事相转化法膜制备的研究工作；Email: tangyuanhui@126.com

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