零价铁去除水中(类)金属(含氧)离子技术发展的黄金十年(2011-2021)

Progress in Zerovalent Iron Technology for Water Treatment of Metal(loid)(oxyan)Ions:A Golden Decade from 2011 to 2021

应用零价铁(ZVI)去除水中(类)金属(含氧)离子是近年来研究的热点。在ZVI除污染过程中,同步提升ZVI除污的反应活性与电子效率对该技术进一步推广应用至关重要。本文综述了近十年(2011-2021年)ZVI的提升技术,主要涉及硫化、外加弱磁场、投加Fe^(2+)、投加氧化剂以及其他新型技术。从不同体系广谱研究以及单一体系具体研究的角度,系统分析了这些技术对ZVI去除含氧水体中(类)金属(含氧)离子的反应活性、去除容量、电子效率的提升表现及作用机制。最后,对ZVI技术未来的研究方向作出了展望,以期促进ZVI技术的进一步完善与发展。本文有望为增强零价铁去除污染物的实际效能提供新的探索方向并完备相关理论基础。

The application of the zerovalent iron(ZVI)for water treatment of metal(loid)(oxyan)ions has been a research hotspot in recent years.In practical applications,how to simultaneously improve the reactivity and electron efficiency of contaminants sequestration by ZVI are highly critical for the progress in ZVI-based technology.This review summarizes the improvements of ZVI technologies proposed in the past 10 years(2011—2021),including the sulfidation,weak magnetic field(WMF),dosing of Fe^(2+)and oxidants,along with other novel technologies.In addition,the performances(e.g.,reactivity,removal capacity and electronic efficiency)and mechanisms of these technologies for contaminants removal are summarized and compared.The enhanced performance of ZVI technology should be complementarily analyzed not only from the broad-spectrum studies of different systems but also from the specific study of a single system.Finally,in order to promote the further improvement and development of ZVI technology,the future research direction of ZVI technology is outlooked.This review is expected to provide a new research direction and a complete theoretical basis for improving the performances of ZVI technology in real environmental application.