硅酸盐通报2024，Vol.43Issue(10)：3736-3744,3754,10.
金尾矿混凝土中重金属长期浸出行为研究
Long Term Leaching Behavior of Heavy Metals in Gold Tailings Concrete
摘要
Abstract
An investigation was undertaken to assess the potential for heavy metal leaching from gold tailings(GTs)when used GTs as fine aggregate for concrete.The leaching behavior in different pH leaching solutions and long-term leaching features of gold tailings concrete were studied.A kinetic model was used to predict the total amount of heavy metal leaching that will occur in next thirty years.The results reveal that the levels of Ba,Cd,Cr,Pb,Mn and Cu in GTs exceed the natural levels of these elements found in Chinese soil.Significantly,the leaching of Ba,Cd,Pb,Mn and Cu is more evident.GTs content shows a positive correlation with the leaching amount of heavy metals,and the cumulative leaching amount of heavy metals drops dramatically after 16 d.Based on 30 years leaching amount prediction,the leaching amount of Pb,Cu and Ba is 2～3 mg/L,while the leaching amount of Cd,Cr and Mn is less than 1 mg/L.These findings indicate that the GTs is sufficiently cured in concrete,thereby reducing the risk of long-term leaching of heavy metals.关键词
金尾矿/混凝土/重金属/长期浸出/动力学模型/预测Key words
gold tailings/concrete/heavy metal/long-term leaching/kinetic model/forecast分类
建筑与水利引用本文复制引用
罗作球,李晓光,张凯峰,付万长,童小根,孟刚..金尾矿混凝土中重金属长期浸出行为研究[J].硅酸盐通报,2024,43(10):3736-3744,3754,10.基金项目
中建西部建设科技研发项目(ZX-202108) （ZX-202108）
陕西省科协企业创新争先青年人才托举计划(2021-1-2) （2021-1-2）
