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零价铁处理环境中有机卤化物、重金属等污染物是目前公认的一种有效的环境修复技术,具有良好的应用前景。但无论是金属铁可渗透反应墙还是铁纳米颗粒原位注射技术都存在缺陷,对零价铁反应性能的改进十分迫切。文章综述了国内外对零价铁反应性能改进的研究进展,详细介绍了当前最热门的铁纳米颗粒负载技术及铁纳米颗粒分散稳定技术对零价铁反应性能的改进机理及优势,指出了目前研究存在的一些问题,并对零价铁技术修复环境的工程应用提出了展望。
Zero-valent iron processing environment, organic halides, heavy metals and other pollutants is recognized as an effective environmental remediation technology, has a good prospect. However, both the metal-iron permeable reaction wall and the in-situ iron nanoparticle injection technique are deficient, and the improvement of the zero-valent iron reaction performance is very urgent. In this paper, the progress of research on the reaction performance of zero valent iron at home and abroad is reviewed. The current hot iron nanoparticle loading technology and the improved mechanism and advantage of iron nanoparticle dispersion stability on the reaction performance of zero valent iron are introduced in detail. Study some existing problems, and put forward the prospect of engineering application of zero-valent iron repair environment.