改性纳米零价铁用于水土环境重金属污染修复的研究进展
Modified Nanoscale Zero-valent Iron for Remediation of Heavy Metal Contamination in Soil and Water Environments:A Review
谢剑雄 1钟杰 2韦行 2黄玲 2孙梦强 2陈志良1
作者信息
- 1. 中国环境科学研究院,北京 100020;广东省农田重金属污染土壤治理与修复工程技术研究中心,生态环境部华南环境科学研究所,广州 510535
- 2. 广东省农田重金属污染土壤治理与修复工程技术研究中心,生态环境部华南环境科学研究所,广州 510535
- 折叠
摘要
重金属污染因具有生物累积性和毒性而威胁人类健康.纳米零价铁(nZVI)因其优异的重金属去除能力而被广泛应用于水土环境重金属污染修复,但因其易团聚、易氧化、易钝化、电子选择性差等缺点而限制了实际应用.本文通过总结nZVI的不同改性方法及对其理化性质的影响,综述了改性nZVI对重金属的反应机理及在土壤环境中应用的影响因素,从材料优化改性角度提升nZVI的分散性、比表面积和电子传递效率等,实现对重金属的高效去除.同时,本文指出了 nZVI在修复水土环境重金属中存在的问题,并对nZVI在土壤和水体污染修复的研究中面临的挑战进行了展望,为nZVI合成改性及应用提供思路.
Abstract
Heavy metal pollution threatens human health due to its bioaccumulation and toxicity.Nanoscale zero-valent iron(nZVI)is widely used for heavy metal pollution remediation in soil and water environments due to its excellent heavy metal removal ability.But its disadvantages,such as easy agglomeration,oxidation,passivation,and poor electroneutrality,limit its practical application.In this paper,by summarising the different modification methods of nZVI and their effects on the physicochemical properties,the reaction mechanism of modified nZVI on heavy metals and the influencing factors of its application in soil environment were reviewed,and the dispersibility,specific surface area and electron transfer efficiency of nZVI were enhanced from the perspective of optimised modification of the material to achieve the high efficiency of heavy metal removal.Meanwhile,this paper pointed out the problems of nZVI in remediation of heavy metals in aqueous soil environments,and looked forward to the challenges faced by nZVI in the study of soil and water pollution remediation,providing ideas for the synthetic modification and application of nZVI.
关键词
纳米零价铁/重金属/改性/反应机理/电子传递/协同作用Key words
Nanoscale zero-valent iron/Heavy metals/Modified/Reaction mechanism/Electron transport/Synergistic effect引用本文复制引用
基金项目
国家自然科学基金重点项目(U22A20606)
国家自然科学基金重点项目(42377262)
广西重点研发计划项目(桂科AB24010113)
乡村振兴战略专项资金省级项目(2023KJ471)
出版年
2024
国家科技期刊平台
NSTL
万方数据