《Water Research》杂志刊登“超滤作用结合的吸附法去除海水中有机物”  

作  者：Chatkaew Tansakul, Stéphanie Laborie, Corinne Cabassud

刊  物：《Water Research》，2011年，45卷第19期，6362-6370页

关键词：混合过程；超滤；吸附法；粉末活性炭；有机物；海水

摘  要：有机污染和生物淤积是反渗透（RO）膜在海水淡化（SW）中主要的结垢类型。像超滤（UF）这样的低压过滤膜已经发展为一种反渗透的预处理措施。然而，由于海水中存在低分子溶解有机物，UF不足以独自达到预处理效果。因此，当前工作的目的是研究一种混合过程，粉末活性炭（PAC）/UF和海水混合后，评估其去除有机物和膜污染的性能。进行不同类型和浓度PAC作用效果的测试。一定条件下蒸汽激活木质PAC添加剂可去除70%的海洋中有机物。此外，耦合PAC可降低UF的膜污染，并且短期污染的UF是可循环利用的。由此可得出结论：海水反渗透淡化的横向流模型中混合PAC/UF是一项有效的预处理过程，可去除75%的有机物，并且在短期试验中水流通量没有下降。

Adsorption combined with ultrafiltration to remove organic matter from seawater

Authors: Chatkaew Tansakul, Stéphanie Laborie, Corinne Cabassud

Journal: Water Research, Volume 45, Number 19 (2011), 6362-6370

Key words: Hybrid processes; Ultrafiltration; Adsorption; Powdered activated carbon; Organic matter; Seawater

Abstract: Organic fouling and biofouling are the major severe types of fouling of reverse osmosis (RO) membranes in seawater (SW) desalination. Low pressure membrane filtration such as ultrafiltration (UF) has been developed as a pre-treatment before reverse osmosis. However, UF alone may not be an effective enough pre-treatment because of the existence of low-molecular weight dissolved organic matter in seawater. Therefore, the objective of the present work is to study a hybrid process, powdered activated carbon (PAC) adsorption/UF, with real seawater and to evaluate its performance in terms of organic matter removal and membrane fouling. The effect of different PAC types and concentrations is evaluated. Stream-activated wood-based PAC addition increased marine organic matter removal by up to 70% in some conditions. Moreover, coupling PAC adsorption with UF decreased UF membrane fouling and the fouling occurring during short-term UF was totally reversible. It can be concluded that the hybrid PAC adsorption/UF process performed in crossflow filtration mode is a relevant pre-treatment process before RO desalination, allowing organic matter removal of 75% and showing no flux decline for short-term experiments.

原文链接：http://www.sciencedirect.com/science/article/pii/S0043135411005434