改性滤料及强化过滤技术在水处理中的应用

Modified Media and Enhanced Filtration Technology Using in Water Treatment

近年来,一些研究者发展了金属氧化物改性滤料技术以克服传统滤料所面临的问题。和常规滤料相比,改性滤料具有一系列优良的性质。本文介绍了强化过滤技术及过滤中用到的改性滤料,对改性滤料的定义、作用机理、载体和改性剂、制备及表征技术做了系统的综述,在此基础上,对改性滤料处理去除水中阳离子重金属离子、砷、硒、氟、有机物、微生物等污染物质做了简要的说明。最后对本领域的研究做出了展望,认为改性滤料强化过滤是适合于我国现状给水处理的技术。

Recently, several researchers have developed techniques for coating metal oxide onto the surface of normal media to overcome the problem of using metal oxide powders in water treatment. Metal-oxide coated media have some excellent characters different from uncoated media. In this paper, the enhanced filtration technology and the species of modified media using in the filtration process were introduced. The definition of modified media, its mechanism, the carriers and adsorbents, the techniques of preparation and token were systemic summarized. Next, base on the knowledge, modified media removing some contaminations, such as cations, anions, organic matter and microorganism, were explained. In the end, some expectation are expressed about this research field and think this modified media enhanced filtration technology are suitable our country' s feedwater treatment actuality.