Membrane fouling by emulsified oil: A review
Membrane fouling by emulsified oil: A review
复制标题
DOI：
10.1016/j.seppur.2020.116919
复制
发表时间：
2020-10
影响因子：
8.6
通讯作者：
Emily N. Tummons;Qinyu Han;H. J. Tanudjaja;Charifa A. Hejase;J. Chew;V. Tarabara
中科院分区：
文献类型：
--
作者：
Emily N. Tummons;Qinyu Han;H. J. Tanudjaja;Charifa A. Hejase;J. Chew;V. Tarabara
液液乳状液的分离是一个具有挑战性的问题，随着非常规石油资源的开发，该问题变得越来越重要。大量被乳化油污染的水需要进行处理，以便安全处置或有效地重复使用。在能够去除分散到较小尺寸液滴(<；15微米)中的油的技术中，膜过程占据了独特的利基市场，可以以相对较低的成本实现所需的分离性能和吞吐量。与大多数基于膜的过程一样，乳化油的分离需要膜污染，这需要定期维护，并增加了额外的运营成本。乳状液的污染行为受到以下因素的影响：液滴的变形能力、本体和膜表面的聚结、液滴和膜对膜的润湿、孔堵塞和油的入侵。本文综述了压力驱动膜分离油水乳状液的文献，重点介绍了乳状液和膜的性质对分离性能的影响。特别关注油膜污染，包括物理化学基础、检测、诊断和可视化。该综述涵盖了工业含油废水和各种油的合成模型乳状液的研究。对膜材料的讨论仅限于使膜更耐污染的表面改性。
Separation of liquid–liquid emulsions is a challenging problem that has gained importance with the development of unconventional oil resources. Large volumes of water contaminated by emulsified oil need to be treated for safe disposal or efficient reuse. Among technologies capable of removing oil dispersed into smaller size droplets (<15 µm), membrane processes occupy a unique niche where the required separation performance and throughput can be achieved at a relatively modest cost. As with most membrane-based processes, separation of emulsified oil entails membrane fouling that requires regular maintenance and imposes additional operational costs. Emulsions present unique challenges as their fouling behavior is affected by droplets’ deformability, coalescence both in the bulk and on the membrane surface, membrane wetting by droplets and films, pore blockage and intrusion by oil. The purpose of this paper is to overview the literature on the separation of oil–water emulsions by pressure-driven membrane processes with an emphasis on how properties of emulsions and membranes affect separation performance. A particular focus is on membrane fouling by oil including physicochemical bases, detection, diagnosis, and visualization. The review spans studies with both industrial oily wastewater and synthetic model emulsions of various types of oil. The discussion of membrane materials is limited to surface modifications that render more fouling-resistant membranes.