[1]朱明飞,郑成龙,崔雯,等.分子质量对天然水体有机物正渗透膜分离的影响[J].中国给水排水,2024,40(9):107-115.
　ZHUMing-fei,ZHENGCheng-long,CUIWen,et al.Effect of Molecular Weight on Forward Osmosis Membrane for Separation of Organic Matters in Natural Water[J].China Water & Wastewater,2024,40(9):107-115.
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分子质量对天然水体有机物正渗透膜分离的影响

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第9期 页码: 107-115 栏目: 出版日期: 2024-05-01
Title:
Effect of Molecular Weight on Forward Osmosis Membrane for Separation of Organic Matters in Natural Water
作者:
朱明飞1， 郑成龙1， 崔雯1， 赵路1， 鞠欣雨1， 王一涵1， 张欢欢1， 王琳1,2， 张志斌1
（1.山东建筑大学 市政与环境工程学院，山东 济南 250101；2.山东建筑大学 资源与环境创新研究院，山东 济南 250101）
Author(s):
ZHU　Ming-fei1， ZHENG　Cheng-long1， CUI　Wen1， ZHAO　Lu1， JU　Xin-yu1， WANG　Yi-han1， ZHANG　Huan-huan1， WANG　Lin1，2， ZHANG　Zhi-bin1
（1. School of Municipal and Environmental Engineering， Shandong Jianzhu University， Jinan 250101， China； 2. Resources and Environment Innovation Institute， Shandong Jianzhu University，Jinan 250101， China）
关键词:
正渗透;  分子质量;  有机物;  膜污染;  界面能垒
Keywords:
forward osmosis;  molecular weight;  organic matter;  membrane fouling;  interfacial energy barrier
摘要:
利用大分子质量海藻酸钠、中分子质量单宁酸等目标有机物及天然有机物系统研究分子质量对正渗透膜分离的影响。结果显示，相比于大分子质量海藻酸钠和小分子质量黄腐酸，中分子质量单宁酸及牛血清白蛋白产生的膜污染较重，单宁酸、牛血清白蛋白、黄腐酸、海藻酸钠的通量损失依次为54.72%、49.91%、29.64%、16.52%；当水样中天然有机物以大、中、小分子质量分布特征为主时，通量损失分别为46.5%、54.8%、50.5%，中分子质量天然有机物引起的膜污染较重；此外，大分子质量天然有机物的含量越多，膜污染越轻，正渗透膜对各分子质量天然有机物的截留率均在89%以上。结合XDLVO理论测定污染物与膜之间的界面能垒，以大分子质量有机物为主的水样具有较大的界面能垒（海藻酸钠ΔEb= 5.71×10-20 J，滤池反冲洗水ΔEb= 9.32×10-21 J），表明污染物与正渗透膜之间的排斥作用较大，膜污染较轻。
Abstract:
This paper investigated the effect of molecular weight on the performance of forward osmosis membrane for separation of the target organic matters such as macromolecular weight sodium alginate (SA) and medium molecular weight tannic acid (TA) and natural organic matters (NOM). Compared with macromolecular weight SA and small molecular weight fulvic acid (FA), the fouling of membrane for separating medium molecular weight TA and bovine serum albumin (BSA) was more serious, and the flux loss of the membrane for separating TA, BSA, FA and SA was 54.72%, 49.91%, 29.64% and 16.52%, respectively. When the NOM in water samples were mainly distributed in large, medium and small molecular weight, the flux loss was 46.5%, 54.8% and 50.5%, respectively, and the membrane fouling caused by NOMs with medium molecular weight was more serious. In addition, the higher content of macromolecular weight NOM would reduce the membrane fouling, and the rejection rate of NOM with different molecular weights was always more than 89%. The interfacial energy barrier between the foulants and membrane was determined according to XDLVO theory. The water samples mainly composed of macromolecular organic matters had large interfacial energy barriers (ΔEb=5.71×10-20 J for SA and ΔEb=9.32×10-21 J for filter backwash water), indicating that the repulsion between foulants and the membrane was large and the membrane fouling was not serious.

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更新日期/Last Update: 2024-05-01