摘要
铬是地下水中的主要污染物之一,尤其是六价CrO_(4)^(2-),HCrO_(4)^(-)和Cr_(2)O_(7)^(2-).由于其高迁移率、生物毒性以及潜在的对人类的致癌性,对人体健康和生态系统构成威胁.腐植酸(HA)具有特殊的物理化学性质,能与Cr(Ⅵ)发生吸附、离子交换和络合等作用,能有效迁移和转化环境中的Cr(Ⅵ).HA与环境中Cr(Ⅵ)的结合机制已经有相关研究,但对于HA微观结构特点尚不清晰.因此,本文系统地阐述了HA的结构特征和与Cr(Ⅵ)的作用机理,分析了矿物质和纳米复合材料去除Cr(Ⅵ)的过程中HA的影响.总结了仍然存在的局限性和尚待解决的问题,并对HA处理含Cr(Ⅵ)废水的未来应用进行了展望.
Chromium is one of the main pollutants in groundwater,especially CrO_(4)^(2-),HCrO_(4)^(-) and Cr_(2)O_(7)^(2-).Due to its high mobility,biological toxicity and potential carcinogenicity to human beings,it poses a threat to human health and ecosystem.Humic acid(HA)has special physical and chemical properties,which can adsorb,exchange and complexate with Cr(Ⅵ),and and can be used to effectively transport and transform Cr(Ⅵ)in the environment.The binding mechanism of HA with Cr(Ⅵ)in the environment has been studied,but the microstructure of HA is still unclear.Therefore,the structural characteristics of HA and its interaction mechanism with Cr(Ⅵ)were systematically described,the effects of HA on Cr(Ⅵ)removal by minerals and nanocomposites were analyzed.The limitations and problems to be solved were summarized,and the future application of HA in Cr(Ⅵ)-containing wastewater treatment was prospected.
作者
袁飞
张永霞
徐恒山
巩冠群
YUAN Fei;ZHANG Yongxia;XU Hengshan;GONG Guanqun(School of Chemical Engineering,China University of Mining and Technology,Xuzhou,221000,China)
出处
《环境化学》
CAS
CSCD
北大核心
2022年第2期653-662,共10页
Environmental Chemistry
基金
国家自然科学基金(21776299,21576281)
中国矿业大学研究生教育教学改革与研究实践项目(2019YJSJG043,YJSJG-2018-01)资助。
