重金属废水处理中磁分离技术的应用现状研究

摘要

This paper discusses the sources and danger of heavy metals, overviews the current methods that have been used to treat heavy metal wastewater briefly, elucidates the basic principle and practical application of magnetic separation in the treat-ment of heavy metals wastewater, than points out the magnetic separation technology is a very promising technology and it has many advantages such as high efficiency, short process time, less land occupation, low cost, high capacity of resisting impact load, without second pollution, etc. Finally, the problems of magnetic separation technology in the treatment of heavy metal wastewater are discussed, and three trends of the technology are prospected. The first trend is to prepare the efficiency, renewable magnetic seeds, the second trend is to develop the magnetic recovery process, and the third trend is to research the mechanism of the magnetic seeds reaction with heavy metals and other pollutants.%论述了重金属废水的来源及危害，简要概述了当前重金属废水的处理技术，着重阐述了磁分离技术的基本原理及其在重金属废水处理中的应用情况，指出磁分离技术具有高效、短时、占地少、成本低、耐冲击负荷能力强及不产生二次污染等优点，是一项极具发展前景的技术。最后还指出了磁分离技术在重金属废水处理中面临的问题，针对这些问题展望了磁分离技术在废水处理领域的三个主要研究趋势，一是制备高效、可再生磁种；二是开发磁回收工艺；三是研究磁种与重金属及其他污染物的作用机理。