摘要
纳米铁氧化物能够高效去除水中多种有机和无机污染物质,但易团聚失活、易流失等问题限制了其在水处理中的实际应用。凹凸棒石(ATP)晶体内部多孔道,比表面积较大,是负载纳米铁氧化物的理想载体。本文介绍和总结了复合材料的主要制备方法,包括浸渍法、溶胶-凝胶法和沉淀法,其对水中磷、有机污染物、重金属及砷具有吸附作用,以及通过活化H_(2)O_(2)、过硫酸盐等过氧化物,催化氧化水中难降解有机污染物的作用、机理和影响因素。为进一步提升复合材料在水处理中去除污染物的效率并与实际水处理工艺相结合的可行性,对其经济和技术可行性等方面的研究进行了展望。
Iron oxides nanoparticles could efficiently remove a variety of organic and inorganic pollutants from water,but its practice application in water treatment is limited due to the problems of aggregation,deactivation and erosion.Attapulgite(ATP)crystal is an ideal carrier for carrying iron oxides nanoparticles because of its porous interior and large specific surface area.This paper mainly introduces and summarizes:the main preparation methods of composite materials,including impregnation method,sol-gel method and precipitation method;Adsorption of phosphorus,organic pollutants,heavy metals and arsenic in water by composite materials;The composite materials can catalyze the oxidation and degradation of organic pollutants in water,by activating peroxides such as H_(2)O_(2) and persulfate.Furthermore,to further improve the performance of composite material in removing pollutants in water treatment and the feasibility of combining it with actual water treatment process,the economic and technical feasibility and other aspects of the future research direction are proposed in this paper.
作者
杨茂莺
赵保卫
索进苗
朱正钰
邓爱琴
杨佳妮
YANG Mao-ying;ZHAO Bao-wei;SUO Jin-miao;ZHU Zheng-yu;DENG Ai-qin;YANG Jia-ni(College of Environmental and Municipal Engineering,Lanzhou Jiaotong University,lanzhou 730070,China)
出处
《环境科技》
2022年第4期59-64,共6页
Environmental Science and Technology
基金
国家自然科学基金项目(22166022)。
关键词
纳米铁氧化物
凹凸棒石
水处理
吸附
催化氧化
Iron oxides nanoparticles
Attapulgite
Water treatment
Adsorption
Catalytic oxidation
