赤泥重金属治理潜力及应用趋势

Resource potential and application trend of remediation of heavy metal pollution control in red mud soil

赤泥为碱性物质,挖掘赤泥在重金属治理中应用潜力,拓展赤泥资源化利用空间,对缓解赤泥固废环境压力及重金属治理具有重要意义。根据赤泥资源性质与环境特征,查阅国内相关文献,从赤泥组分与结构特征及活化特性,探讨赤泥在重金属污染修复中作用与功效,并从赤泥重金属修复的环境风险、赤泥改性钝化材料、联合修复等方面系统梳理赤泥在重金属污染修复中的应用与潜力,提出赤泥重金属修复途径。赤泥碱性强可中和土壤酸碱度;赤泥组分稳定、比表面积高,为重金属修复提供了吸附位点,具有吸附重金属离子的潜在功能;赤泥结构改性材料有助于拓展赤泥材料化应用。赤泥功能材料在重金属治理中具有潜在应用价值,有助于减少赤泥环境风险。

Red mud is alkaline material,it is important to explore the potential of red mud application in soil heavy metal pollution treatment,expand the use of red mud resources and alleviate the environmental pressure of red mud solid waste and soil heavy metal remediation.According to the nature of red mud resources and environmental characteristics,through the review of relevant domestic research literature,from the red mud component characteristics,structural characteristics and activation characteristics,this study explores the role and efficacy of red mud used in remediation of heavy metal.The potential for application of red mud in the remediation of heavy metal pollution are sorted out systematically from the environmental risk of red mud,modified red mud materialization,and remedial modes of multiple technologies.The remediation of red mud is proposed in the heavy metal contaminated soil.Red mud has strong alkalinity,which can neutralize soil pH and reduce the bio-availability of heavy metal ions directly in the soil.In addition,red mud has stable components,high specific surface area and strong alkalinity.Red mud provides adsorption sites for heavy metal remediation and has the potential function of adsorbing heavy metal ions in the soil under certain conditions.Meanwhile the research and development of red mud modified materials by using red mud void structure will help to expand the application of red mud materialization.Functional materials of red mud have potential application value in heavy metal control,which can help reduce red mud environmental risks.