Performing a microfiltration integrated with photocatalysis using an Ag-TiO(2)/HAP/Al(2)O(3) composite membrane for water treatment: Evaluating effectiveness for humic acid removal and anti-fouling properties.
Performing a microfiltration integrated with photocatalysis using an Ag-TiO(2)/HAP/Al(2)O(3) composite membrane for water treatment: Evaluating effectiveness for humic acid removal and anti-fouling properties.
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DOI：
10.1016/j.watres.2010.06.068
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发表时间：
2010-12
期刊：
影响因子：
12.8
通讯作者：
N. Ma;Yaobin Zhang;X. Quan;Xinfei Fan;Huimin Zhao
中科院分区：
文献类型：
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作者：
N. Ma;Yaobin Zhang;X. Quan;Xinfei Fan;Huimin Zhao
近年来，膜过滤在水处理和废水回用中的应用越来越广泛。为进一步提高膜处理效果，减少膜污染，采用高活性光催化膜Ag-TiO 2/HAP（Ca 10（PO 4）6（OH）2）/Al 2 O3实现微滤耦合膜处理地表水。通过去除腐殖酸（HA）试验，考察了不同饲料总有机碳（TOC）、光强和跨膜压（TMP）条件下对膜电位的影响。在紫外光照射下，膜对HA的去除率和抗污染性能均有所提高，这可能是由于膜在过滤过程中沿着光催化降解污染物的作用。在给定的进水组成下，增加光照强度会导致HA从水溶液中的去除增加。然而，一个有限的TMP似乎存在，超过此增加的HA去除不能持续。污染行为分析表明，在紫外线照射下，从初始的孔堵塞到滤饼过滤的污染模式的转变发生得慢得多。此外，地表水处理对微量有机污染物的去除效率上级，通量减少程度也更温和，这表明具有增强性能的集成系统有望成为一种新兴的水处理技术。
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, Ca10(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.