| TiO2光催化复合分离膜对水中天然有机物的去除 |
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| 引用本文： | 刘芭,宋宏臣,邵嘉慧,何义亮.TiO2光催化复合分离膜对水中天然有机物的去除[J].环境工程学报,2013,7(11):4207-4213. |
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| 作者姓名： | 刘芭 宋宏臣 邵嘉慧 何义亮 |
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| 作者单位： | 上海交通大学环境科学与工程学院, 上海 200240;广州中国科学院先进技术研究所水科学研究中心, 广州 511458;上海交通大学环境科学与工程学院, 上海 200240;上海交通大学环境科学与工程学院, 上海 200240 |
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| 基金项目： | 国家自然科学基金资助项目(21277090);国家"水体污染控制与治理"科技重大专项(2008ZX07106-2) |
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| 摘 要： | 在水源污染越来越严重、水质标准日益严格的背景下,超滤(UF)已逐渐成为替代饮用水常规处理技术的最佳选择之一。本研究中采用相转化法,将聚偏氟乙烯(PVDF)、聚乙二醇(PEG)和二氧化钛(TiO2)共混制得光催化复合分离膜并对其进行扫描电子显微镜(SEM)、原子力显微镜(AFM)和X射线能谱仪(EDS)等相应的表征。比较了有无光照条件下,PVDF-PEG和PVDF-PEG-TiO2膜对腐殖酸(HA)的截留和超滤过程中的膜污染情况。研究结果表明,TiO2光催化复合分离膜能提高对水中天然有机物的去除并同时降低膜污染。紫外光照强度越强,PVDF-PEG-TiO2膜的抗污染性能越好。另外,光催化能更有效地减少超滤初始浓度较低的腐殖酸溶液过程中的膜通量衰减。
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| 关 键 词： | TiO2光催化复合分离膜 超滤 光催化 截留 膜污染 |
Removal of natural organic matter in water with TiO2-doped photocatalytic separation membrane |
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| Liu B,Song Hongchen,Shao Jiahui and He Yiliang.Removal of natural organic matter in water with TiO2-doped photocatalytic separation membrane[J].Techniques and Equipment for Environmental Pollution Control,2013,7(11):4207-4213. |
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| Authors: | Liu B Song Hongchen Shao Jiahui and He Yiliang |
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| Institution: | School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China;Water Science Research Center, Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, China;School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China;School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China |
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| Abstract: | Due to the deterioration of water pollution and increasing stringent water quality standards, ultrafiltration (UF) has become one of the best alternatives replacing conventional drinking water treatment technologies. In this study, the modified photocatalytic polyvinylidene fluoride (PVDF) membranes were prepared by adding different doses of polyethylene glycol (PEG) and TiO2 nanoparticles through the phase inversion process (PIP) method, and were characterized by scanning electron microscope (SEM), atomic force microscope (AFM) and energy dispersive spectroscopy (EDS). The rejection and membrane fouling of PVDF-PEG (P-P) and PVDF-PEG-TiO2 (P-P-T) membranes were investigated during filtration of humic acid (HA). Results indicated that TiO2-doped photocatalytic separation membrane could improve the rejection of natural organic matter (NOM) and reduce the membrane fouling at the same time. The higher the intensity of UV irradiation, the better the anti-fouling characterization of P-P-T membrane was. In addition, when the initial concentration of HA solution was lower during UF, the flux decline of membrane could be decreased more effectively by photocatalysis. |
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| Keywords: | PVDF-PEG-TiO2 membranes ultrafiltration photocatalysis rejection membrane fouling |
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