污泥中重金属去除研究进展

Advances in the study of heavy metals removal from sludge

污水污泥(sewage sludge,SS)中严重超标的重金属(heavy metals,HMs)属于危险废物,且HMs丰度的高低决定了污泥的最终处理成本。世界上每年污泥的产量急速上升,脱除污泥中HMs成为研究者面临的巨大挑战。文中介绍了污泥中HMs的来源和存在形态,详细总结了目前各种去除污泥中HMs的方法、原理和去除效率,并阐述了每种方法的现存问题。最后针对目前各种方法存在的弊端,对未来去除SS中HMs的方法提出展望。这将有利于研究人员开发绿色环保和经济友好型的去除污泥中HMs的技术。

Severe excessive Heavy Metals(HMs)in Sewage Sludge(SS)are hazardous waste and the abundance of HMs determines the final treatment cost of sludge.The removal of HMs from sludge is a great challenge for researchers’use the annual production of sludge in the world is increasing rapidly.This paper describes the sources and forms of HMs presented in sludge,and summarizes in detail the current methods,principles and removal efficiencies of various methods for removing HMs from sludge.This study describes the existing problems of each method.Finally,we present an outlook on the future methods for HMs removal from SS with respect to drawbacks of the current methods.This review will be beneficial for researchers to develop the green environment protection and economically friendly techniques for the removal of HMs from sludge.