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论文类型：期刊论文

发表时间：2010-12-01

发表刊物：WATER RESEARCH

收录刊物：SCIE、EI、PubMed、Scopus

卷号：44

期号：20

页面范围：6104-6114

ISSN号：0043-1354

关键字：Composite membrane; Microfiltration; Photocatalysis; Humic acid; Surface water; Fouling

摘要：Membrane filtration has been increasingly used for water treatment and wastewater reclamation in recent years. To further improve the effectiveness of membrane process and reduce membrane fouling, a highly reactive photocatalytic membrane. Ag-TiO2/hydroxiapiate (HAP, Ca-10(PO4)(6)(OH)(2))/Al2O3, was employed to realize microfiltration (MF) coupling photocatalysis for surface water treatment. The effectiveness on the potential of membrane was investigated by removing humic acid (HA) test under different feed total organic carbon (TOC), light intensity and transmembrane pressure (TMP). The HA removal and anti-fouling property of as-prepared membrane was improved under UV irradiation, likely due to photocatalytic degradation of foulants along with filtration simultaneously. Under given feed water composition, increasing the light intensity resulted in increased removal of HA from aqueous solution. However, a limiting TMP seems to exist beyond which the increased HA removal cannot be sustained. Fouling behavior analysis indicated that the transition in fouling mode from initial pore blocking to cake filtration occurred much slower as UV irradiated. Furthermore, a superior efficiency on removal of trace organic contaminants, as well as milder flux reduction, was presented from surface water treatment, which demonstrated that the integrated system with enhanced performance is foreseen as an emerging technique for water treatment. (C) 2010 Elsevier Ltd. All rights reserved.