文献类型：期刊文献

中文题名：赤泥与磷石膏制备胶凝材料的环境风险研究

英文题名：Study on environmental risk of cementitious materials prepared from red mud and phosphogypsum

作者：马连刚 金梅 龙毅 陈琨 仇伟

第一作者：马连刚

机构：[1]贵州理工学院,贵州贵阳550003;[2]贵州省生态环境监测中心,贵州贵阳550003;[3]黔西南生态环境监测中心,贵州兴义562400

第一机构：贵州理工学院

年份：2022

期号：1

起止页码：15-19

中文期刊名：轻金属

外文期刊名：Light Metals

收录：北大核心:【北大核心2020】；

基金：贵州省教育厅青年科技人才成长项目(黔教合KY字[2016]228);贵州省科技计划项目(黔科合支撑[2018]2835);贵州理工学院高层次人才科研启动项目(No.XJGC20190635)

语种：中文

中文关键词：磷石膏;赤泥;胶凝材料;淋滤;环境风险

外文关键词：phosphogypsum;red mud;cementitious materials;leaching;environmental risk

摘要：赤泥是碱法生产氧化铝的副产物,磷石膏是磷化工业的固体废弃物,解决碱性赤泥和酸性磷石膏的综合利用问题是氧化铝和磷化工生产企业实现可持续发展的必然途径。本文以前期研究寻找到的胶凝材料工艺方法(赤泥和磷石膏作为原料)制备膏体填充柱,通过淋滤实验发现,在持续的淋滤过程中,该胶凝膏体渗滤液中所含的阴离子(PO_(4)^(3-)、SO_(4)^(2-)等)、阳离子(Na^(+)、Ca^(2+)、Mg^(2+))和有毒金属元素Cr会持续溶出,且浓度超过了地(表)下水环境质量标准。因此,要将该材料作为矿山填充胶凝剂使用,还需进一步开展该胶凝材料离子钝化技术研究,以降低其环境风险。
Red mud is a by-product of alkaline production of alumina,and phosphogypsum is a solid waste of phosphating industry.It’s an inevitable way for alumina and phosphorus chemical producers to develop sustainably by addressing the problem of the comprehensive utilization of alkaline red mud and acid phosphogypsum.In this paper,the paste packed column is prepared with the cementitious material technology found in previous research(red mud and phosphogypsum as raw materials).Through the leaching experiment,it is found that during the continuous leaching process,the anions(PO_(4)^(3-),SO_(4)^(2-),etc.),cations(Na^(+),Ca^(2+),Mg^(2+))and toxic metal element Cr in the leachate of the cementitious material would continue to dissolve,and the concentration of which could exceed the groundwater/surface water environmental quality standard.Therefore,in order to use this material as mine filling cementitious agent,it is required to further study the ion passivation technology of this cementitious material,so as to reduce its environmental risk.