改性生物质燃料灰渣对矿区砷污染土壤的钝化性能研究  

Research on Passivation Performance of Arsenic-Contaminated Soil in Mining Areas Using Modified Biomass Fuel Ash

作　　者：周博 胡玉杰 石建军[1] Zhou Bo;Hu Yujie;Shi Jianjun(School of Chemical Engineering,Anhui University of Science and Technology,Huainan 232001,China;Mineral Resources Center of Tongling Nonferrous Metals Group Co.,Ltd.,Tongling 244000,China)

机构地区：[1]安徽理工大学化学工程学院,安徽淮南232001 [2]铜陵有色金属集团股份有限公司矿产资源中心,安徽铜陵244000

出　　处：《山东化工》2024年第3期248-251,共4页Shandong Chemical Industry

基　　金：安徽省科技重大专项(201903a06020003);废弃矿区及周边重金属污染土壤修复技术研发与综合示范。

摘　　要：采集安徽省内某废弃矿区周边实际砷污染土壤为研究对象,选用生物质燃料灰渣以及氧化镁球磨改性生物质燃料灰渣对砷污染土壤进行钝化处理,以此考察钝化剂对土壤砷形态分布的影响。结果表明:各实验组均可提高土壤pH值对土壤中有效态砷的钝化效果,从各组处理变化趋势来看,经氧化镁球磨改性的生物质燃料灰渣对土壤有效态砷的钝化效果进一步增强,其中加入质量分数4%球磨改性的钝化效果相对较好,比空白组的钝化效率约提高12%,加入质量分数6%的原生物质燃料灰渣约提高5%;各组钝化处理后土壤砷形态都在朝着无定型、晶质结合态和残渣态转换,促进了土壤中砷的稳定化,有利于土壤中的砷长期稳定。The actual arsenic contaminated soil around an abandoned mining area in Anhui Province was collected as the research object,and biomass fuel ash and magnesium oxide ball milling modified biomass fuel ash were selected to passivate the arsenic contaminated soil,so as to investigate the effect of passivator on the arsenic speciation distribution in soil.The results show that all experimental groups can improve the passivation effect of soil available arsenic by increasing soil pH value.From the changing trend of each group,the passivation effect of biomass fuel ash modified by magnesium oxide ball milling on soil available arsenic is further enhanced,and the passivation effect of adding 4%ball milling modification is relatively good,which is about 12%higher than that of the blank group,and about 5%higher than that of adding 6%raw biomass fuel ash.After each passivation treatment,the forms of arsenic in soil are changing to amorphous,crystalline-bound and residual,which promotes the stabilization of arsenic in soil and is beneficial to the long-term stability of arsenic in soil.

关 键 词：砷污染 生物质燃料灰渣 改性 土壤钝化 

分 类 号：X53[环境科学与工程—环境工程]