Influence of calcium on the evolution of irreversible fouling in microfiltration/ultrafiltration membranes
Influence of calcium on the evolution of irreversible fouling in microfiltration/ultrafiltration membranes
复制标题
DOI：
10.2166/aqua.2007.018
复制
发表时间：
2007-09
影响因子：
4.3
通讯作者：
H. Yamamura;Kenji Okimoto;K. Kimura;Y. Watanabe
中科院分区：
文献类型：
--
作者：
H. Yamamura;Kenji Okimoto;K. Kimura;Y. Watanabe
使用微滤（MF）/超滤（UF）膜的水处理在全世界越来越受欢迎，但膜污染问题需要解决。在一系列小型过滤试验的基础上，研究了钙离子对MF/UF膜过滤天然有机物（NOM）过程中不可逆污染的影响。两种类型的给水，市售腐植酸溶液和地表水用于饮用水源，过滤与四个不同的MF/UF膜。结果发现，钙对不可逆污垢的演变的影响将根据给水特性而不同。钙促进了市售腐殖酸中具有疏水性质的小分子的聚集，并且聚集体可能堵塞微孔，导致严重的不可逆污染。在本研究中使用的地表水的情况下，钙的影响不明显。这一结果表明，使用商业腐殖酸的膜污染的检查是不合适的。
Water treatment using microfiltration (MF)/ultrafiltration (UF) membranes is gaining in popularity all over the world but the problem of membrane fouling needs to be addressed. In this study, the influence of calcium on irreversible fouling in MF/UF membrane filtering natural organic matter (NOM) was investigated on the basis of a series of bench-scale filtration tests. Two types of feed water, solution of commercially available humic acid and surface water used for drinking water source, were filtered with four different MF/UF membranes. It was found that the influence of calcium on the evolution of irreversible fouling would differ depending on the feed water characteristics. Calcium facilitated the aggregation of small molecules with hydrophobic nature contained in commercially available humic acid and the aggregate probably plugged the micropores, resulting in severe irreversible fouling. The effect of calcium was not obvious in the case of the surface water used in this study. This result implies that the use of commercial humic acid for the examination of membrane fouling would be inappropriate.