Ultrafiltration of humic acid and surface water with tubular ceramic membrane
Ultrafiltration of humic acid and surface water with tubular ceramic membrane
复制标题
管式陶瓷膜超滤腐殖酸和地表水
DOI：
10.1080/19443994.2013.768791
复制
发表时间：
2013-07-01
影响因子：
1.1
通讯作者：
Chen, Jianwei
中科院分区：
文献类型：
--
作者：
Xia, Shengji;Zhou, Yumin;Chen, Jianwei
近年来，陶瓷膜过滤在饮用水生产中越来越受到关注。系统地研究了孔径为0.01 μ m的管状陶瓷膜的通量演化和截留性能。以腐殖酸（HA）溶液和地表水为原料，在中试规模的错流过滤装置上进行了不同跨膜压（TMP）条件下的过滤试验。测量，如总有机碳（TOC），在254 nm（UV 254），荧光激发发射矩阵（EEMs），pH值，和电导率的原水和渗透。在过滤过程中，通量急剧下降，在开始阶段，由于污垢，并进行到一个伪稳定的通量。在低HA浓度下，TMP分别为0.5、0.8、1.0和1.2bar时，前30 min的膜通量分别下降了36、48、50和51%，而在较高浓度下，膜通量分别下降了47、52、57和65%;在所研究的特定进水浓度下，稳态通量随着TMP从0.5巴增加到1.2巴而增加。最后，通过评价TOC、UV 254和EEM的去除效率来确定膜处理的有效性。在低有机物浓度下，随着TMP的增加，截留率降低，而在较高有机物浓度下，随着TMP的增加，截留率增加。除此之外，过滤在腐殖酸和地表水中表现出不同的截留性能，对腐殖酸的截留率（>50%）高于地表水（
In recent years, the ceramic membrane filtration has become increasingly attractive for drinking water production. The flux evolution and retention performance of a tubular ceramic membrane with nominal pore size of 0.01m was systematically investigated. Filtration experiments were carried out on a pilot-scale crossflow unit using humic acid (HA) solution and surface water as feed by varying transmembrane pressure (TMP). Measurements such as total organic carbon (TOC), ultraviolet absorbance at 254nm (UV254), fluorescence excitation emission matrices (EEMs), pH, and conductivity were made on both raw water and the permeate. During filtration, flux declined drastically in the beginning stage due to fouling and proceeded to a pseudostable flux. In the low HA concentration, the flux decreased in the first 30min for about 36, 48, 50 and 51% with the TMP of 0.5, 0.8, 1.0, and 1.2bar, respectively, while it came to 47, 52, 57, and 65%, respectively for relatively high concentrations; the steady flux increased with increasing TMP from 0.5 to 1.2bar at the specific concentration of feed water studied. Finally, the effectiveness of the membrane treatment was determined by evaluating the removal efficiency of TOC, UV254, and EEM. The rejection efficiency decreased with increasing TMP in low organic concentration of feed water, while increased in relatively high feed concentration. In addition, filtration in HA and surface water showed a different retention performance, rejection efficiency for HA (>50%) was higher than that for surface water (