标题: Solidification/stabilization of copper tailings by industrial solid waste based cementing materials: Apatite synergy, heavy metal toxicity and performance
作者: Cai, YA (Cai, Yungao); Xiang, YW (Xiang, Yuwei); Zhou, M (Zhou, Min); Wang, HJ (Wang, Haojie); Hou, HB (Hou, Haobo)
来源出版物: CERAMICS INTERNATIONAL 卷: 51 期: 20 页: 31000-31008 DOI: 10.1016/j.ceramint.2025.04.292 Early Access Date: JUL 2025 Published Date: 2025 AUG 子辑: A
摘要: The increasing stockpiles of copper tailings are putting great pressure on the surrounding ecosystem. In this paper, a new stabilization/solidification method for the treatment of copper tailings using coal bottom ash and apatite was proposed and the leaching behavior of stabilization/solidification copper tailings was investigated. To further investigate the immobilization properties and mechanisms, unconfined compressive strength, toxicity leaching tests, the fraction distribution tests, environmental risk assessment, and hydration products were explored. The results show that the maximum unconfined compressive strength of the curing block was 7.12 MPa at 28 days. Furthermore, the leaching concentration of Cu and Mn from the copper tailings were reduced to meet the corresponding national standards. The storage morphology of Cu and Mn was altered to predominantly exist in the residual state. The direct toxicity of Cu and Mn was reduced by an average of about 91.32 %. Chlorite, andradite and amorphous gel were the main hydration products, and the addition of apatite resulting in the formation of hydroxyapatite. This study presents new opportunities for the harmless and large-scale utilization of industrial waste, such as coal bottom ash, contributing to resource recovery and sustainable practices.
作者关键词: Copper tailings; Coal bottom ash; Apatite; Stabilization/solidification; Heavy metal
KeyWords Plus: MARINE-SEDIMENTS; FLY-ASH; COAL; CONCRETE; LEAD
地址: [Cai, Yungao; Zhou, Min; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.
[Xiang, Yuwei; Wang, Haojie] China Three Gorges Univ, Coll Hydraul & Environm Engn, Yichang 443002, Peoples R China.
[Xiang, Yuwei; Wang, Haojie] Minist Educ, Engn Res Ctr Ecoenvironm Three Gorges Reservoir Re, Yichang, Peoples R China.
通讯作者地址: Hou, HB (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.
Xiang, YW (通讯作者)，China Three Gorges Univ, Coll Hydraul & Environm Engn, Yichang 443002, Peoples R China.
电子邮件地址: [email protected]; [email protected]
影响因子：5.6
