纳米零价铁的改性及去除重金属的应用研究

Study on modification of nano-sized zero-valent iron and its application in heavy metal removal

回顾化学还原法、球磨法和绿色制备nZVI的方法及优缺点,总结分析了近年来nZVI复合材料的改性研究及对重金属去除方面的应用进展,阐述了nZVI复合材料对重金属离子的吸附机理主要为吸附、还原、络合和共沉淀、协同作用。指出了nZVI改性材料和去除重金属存在的不足,并对未来nZVI去除重金属的研究趋势进行展望,以期为nZVI改性及去除重金属的应用研究提供参考。

This paper mainly reviews the methods and pros and cons of chemical reduction,ball milling and green preparation of nZVI,summarizes the modification research of nZVI composites and the application progress of heavy metal removal in recent years,and expounds the adsorption mechanism of nZVI composites for heavy metal ions,mainly adsorption,reduction,complexation,co-precipitation and synergy.The shortcomings of nZVI modified materials and heavy metal removal are pointed out,and the future research trend of nZVI removal of heavy metals is prospected,in order to provide reference for the application research of nZVI modification and removal of heavy metals.