土壤胶体对渗滤液中铀(Ⅵ)迁移影响的研究进展

摘要

铀废石渗滤液中铀(Ⅵ)进入土壤后极易通过食物链对人类及周围环境产生危害.在已有研究基础上,简述了土壤胶体的来源和分类及其与铀(Ⅵ)的相互作用,重点讨论了土壤胶体结构、铀离子形态、土壤Eh-pH值、离子强度和有机质对溶液中铀(Ⅵ)的阻滞迁移影响,介绍了近年来土壤胶体在吸附溶液中铀(Ⅵ)的应用进展,提出了铀废石渗滤液中铀(Ⅵ)对环境的长期影响可能取得突破的几条途径.%The uranium(VI) in uranium waste rock leachate could directly threaten human health and surrounding environment after its entering into soil through food chain. On the basis of present the domestic and foreign researches, this paper reviewes the source and classification of soil colloids, and generalizes the interaction between uranium ( VI ) and soil colloids. The blocking effects of the structure of soil colloids, the form of uranium ions, Eh and pH value of soil, ionic strength and organic matters on uranium(VI) adsorption process are discussed. As well as the application progress of colloid are presented. Moreover, several suggestions are proposed for how to present the breakthrough in long-term affecting the environmental of uranium(VI) which is in uranium waste rock leachate.