标题: Activated electrolytic manganese residue-based environmental materials for mine remediation: Performance and mechanism

作者: Zeng, TY (Zeng, Tianyu); Xue, SZ (Xue, Size); Zhuang, SY (Zhuang, Shiyu); Zhou, X (Zhou, Xian); Hou, HB (Hou, Haobo); Huang, BT (Huang, Bo-Tao); Lan, JR (Lan, Jirong)

来源出版物: JOURNAL OF HAZARDOUS MATERIALS 卷: 482 文献号: 136560 DOI: 10.1016/j.jhazmat.2024.136560 Published Date: 2025 JAN 15

摘要: To address the environmental hazards of electrolytic manganese residue (EMR) accumulation and the urgent need for ecological restoration in mining areas, we developed an innovative method for creating pit restoration materials (S-EMRs) using alkaline-excited EMR via mechanical ball milling. Black liquid (BL) was used as a base exciter and EMR as the precursor. With a BL dosage of 35 %, alumina as the milling medium, a speed of 500 rpm, and milling for 20-35 min, we achieved an S-EMR compressive strength of approximately 30 MPa after 14 d-six times higher than that in conventional cement curing (C-EMR). This method also stabilized contaminants such as Mn and NH4+ by over 10-fold. The self-cementation and formation mechanisms of the S-EMR were clarified through chemical characterization and geochemical modeling. Over 3 y of monitoring and plant experiments have shown that S-EMR ensured the long-term stability and ecological restoration of mining areas. Remarkably, it enhanced microbial diversity and biophilicity, improving tomato seed germination by over 90 % compared with that in control. This study presents a sustainable and innovative solution for the green cycle rehabilitation of Mn mining areas with significant potential for engineering applications.

作者关键词: Electrolytic manganese residue; Long-term durability; Mechanochemistry; Solid waste-based materials; Microbial diversity

地址: [Zeng, Tianyu; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Xue, Size; Zhuang, Shiyu; Lan, Jirong] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China.

[Zhou, Xian] Minist Water Resources, Changjiang River Sci Res Inst, Res Ctr Water Engn Safety & Disaster Prevent, Wuhan 430010, Peoples R China.

[Huang, Bo-Tao] Zhejiang Univ, Inst Adv Engn Struct, Hangzhou, Peoples R China.

通讯作者地址: Lan, JR (通讯作者)，Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China.

电子邮件地址: botaohuang@zju.edu.cn; jironglan@whu.edu.cn

影响因子：12.2