| Title | Insight into mechanisms of Mn and NH4+-N removal with recovery of Mn and Mg from electrolysis manganese residue (EMR): Effect of humus and NaOH |
|---|---|
| ID_Doc | 10862 |
| Authors | Lv, X; Deng, JS; Lei, JL; Shu, ZG |
| Title | Insight into mechanisms of Mn and NH4+-N removal with recovery of Mn and Mg from electrolysis manganese residue (EMR): Effect of humus and NaOH |
| Year | 2025 |
| Published | |
| Abstract | Electrolytic manganese residue (EMR) poses significant environmental risks due to the release of manganese (Mn) and ammonium nitrogen (NH4+-N). This study introduced an approach for the harmless treatment and resource utilization of EMR using a combination of humus and sodium hydroxide (NaOH), and the recovery of Mn and Mg from leachate. Water leaching removed 71.1 % Mn and 96.5 % NH4+-N from EMR. Subsequent ball milling and roasting with humus/NaOH significantly stabilized Mn, achieving leaching toxicity below 2 mg/L for Mn and 3 mg/L for NH4+-N after 28 days of curing. The use of NaOH to activate humus enhanced its adsorption and self-binding solidification, facilitating the immobilization of Mn2+ through the formation of C-S-H. This effectively reduced the leaching toxicity of Mn, making the treated EMR residue compliant with environmental regulations (Class I sites in general industrial solid waste storage and landfill facilities). The leachate was further utilized for Mn and Mg recovery through sulfide and hydroxide precipitation, contributing to a circular economy and reducing the reliance on primary resources. This approach ensures high recovery rates while minimizing the formation of unwanted by-products. The study demonstrated the economic feasibility of the proposed method through a cost-benefit analysis, highlighting its potential for widespread application in the manganese industry. |
Similar Articles
| ID | Score | Article |
|---|---|---|
6334
|
Sadeghi, SM; Ferreira, CMH; Soares, HMVM Evaluation of two-step processes for the selective recovery of Mn from a rich Mn residue(2019) | |
| 10775
|
Sarker, SK; Yadav, S; Bruckard, W; Singh, N; Haque, N; Bhuiyan, M; Pramanik, BK Valorisation of sulphide tailings: A novel dilute reagents-based Mn extraction process(2024) | |
| 26831
|
Wang, F; Long, GC; Ma, KL; Zeng, XH; Tang, Z; Dong, RZ; He, JH; Shangguan, MH; Hu, QC; Liew, RK; Li, Y; Zhou, JH Recyling manganese-rich electrolytic residues: a review(2023)Environmental Chemistry Letters, 21, 4 | |
| 11119
|
Mohanty, A; Sukla, LB; Nayak, S; Devi, N Selective recovery and intensification of Mn from spent LiMn2O4 using sulfuric acid as lixiviant and Na-D2EHPA as extractant(2022)Geosystem Engineering, 25, 5-6 |