膜污染的光学监测技术研究进展

Research progress of optical monitoring technologies for membrane fouling

光学监测技术具备原位、快速、无损等优势,能够对膜污染进行实时在线监测,对于膜污染现象的深入理解和膜污染控制方法的优化具有重要意义。综述了近年来研究较多、发展较快的几类膜污染光学实时监测技术,包括穿透膜直接观察、光学相干断层扫描、激光共聚焦显微镜等显微成像技术,三维荧光光谱、拉曼光谱等分子光谱技术以及粒子图像测速技术,阐述了各技术的工作原理、衍生技术及在膜污染领域的典型应用,着重从监测区域和提供的膜污染信息等方面分析了其优缺点,并对未来光学监测技术的发展方向提出了展望,有助于推动其在实际膜法水处理工程中的应用。

Optical monitoring technologies can be used to monitor membrane fouling in real-time and online with the in-situ,fast and nondestructive advantages,which are of great significance for the in-depth understanding of membrane fouling and the optimization of fouling control strategies.In this paper,several kinds of optical real-time monitoring technologies for membrane fouling that had been studied and developed rapidly in recent years were re-viewed,including microscopic imaging techniques such as direct observation through membrane,optical coherence tomography and laser confocal microscopy,molecular spectroscopies such as excitation-emission matrix and Raman spectroscopy,and particle image velocimetry.The principles,the typical applications in fouling characterization of these techniques and the derivative techniques were described comprehensively,and the advantages and disadvan-tages of each technique were analyzed from the aspects of monitoring area and foulant information provided.Finally,the future development direction of the optical monitoring technologies was put forward,which would promote the application of these technologies in the membrane water treatment industries.