膜科学与技术

亲水性改性纳滤膜去除小分子量溶解性有机物的效果研究

作者：凌小佳²，陈靓³，祝建中¹，丁莹⁴

单位：浅水湖泊综合治理与资源开发教育部重点实验室，河海大学，环境学院，江苏南京 210009；2.江苏南水科技有限公司，江苏南京 210012；3.江苏省秦淮河水利工程管理处，江苏南京 210001; 4.南京晓庄学院，环境科学学院，211171

关键词：纳滤膜；亲水性；小分子量溶解性有机物；去除

出版年,卷(期):页码： 2018,38(4):81-85

摘要：

以聚醚砜溶胶为基底，掺杂未煅烧SBA-15介孔分子筛前驱体，采用相转化法并经过120℃煅烧后制备成膜。利用N2吸附-脱附和静态接触角测试对改性膜材料的表面性能进行了表征。以富里酸、蛋白质作为小分子量溶解性有机物的典型代表物，考察不同掺量改性纳滤膜对其去除效果。实验结果表明：改性膜平均孔径大小有一个数量级的降低，达到纳滤级别；亲水性能增强。改性纳滤膜可以实现对富里酸的高效去除，膜损失率也明显降低，从42.78 %减少到3 %以内，并选出了最佳掺杂量的优选膜—0.2 wt%改性膜。优选膜对不同性质大小的氨基酸去除效果差别很大，最低为15.00 %，最高可达79.67 %。

The modified membranes have been fabricated on the polyethersulfone sol as substrate and the uncalcined SBA-15 mesoporous molecular sieve precursors as addition via phase inversion and calcination at 120℃. The properties of the modified membranes were characterized by N2 adsorption-desorption and static contact angle. The effects of varying content of addition in modified nanofiltration membranes were investigated by using fulvic acid and protein as typical representative of small molecular weight dissolved organic matter. The results showed that the average pore size of modified membranes was reduced by an order of magnitude, reaching the nanofiltration level. Meanwhile, the hydrophilicity was enhanced. The modified nanofiltration membranes could remove fulvic acid effectively, with membrane loss rate reducing, from 42.78% to less than 3%. 0.2 wt% modified membrane exhibited the best performance according to the effect of stain resistance and removal rate. Further more, the removal efficiency of amino acids in different sizes by the best modified membrane varied greatly, with a minimum of 15.00% and the maximum of 79.67%.

作者简介：凌小佳（1991-），女，硕士研究生，主要研究方向为水处理材料；联系电话：15295527036；电子邮件：570404482@qq.com；地址：江苏省南京市雨花台区龙西路11号，210012 通讯作者：祝建中（1970-），男，河海大学教授，博士生导师；电子邮件：zhuhhai2010@hhu.cn

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