TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
·
2025
·Vol. 78
·期 4
·1-10
·
IF 1.6
Pan Qi,Zhu Zhen,Lin Xiaocheng,Guo Bao,Jiang Kaixi
It is a waste of gallium resource to discard the high aluminum-containing gallium electrolyte. The Ga/Al separation is difficult by only using lime precipitation because of high gallium loss rate. The present study employs an adsorption resin LSC-600P to recover gallium in the simulated gallium electrolyte and then uses lime to remove aluminum, leaving only alkali solution recycled. The results showed that the aluminum removal rate in the gallium electrolyte was 93.12% under the conditions of reaction temperature of 85 °C, addition of lime 2 times to the theoretical molar ratio of calcium to aluminum, reaction time of 3 h and stirring speed of 600 r/min. In the experiments of gallium adsorption, after six adsorption–desorption cycles, the adsorption rate of gallium by LSC-600P resin still reached 98.6%, and the adsorption rate of aluminum was lower than 4.5%. In the desorption process, the desorption rate of gallium was more than 98%, and the aluminum content in the stripping solution after desorption was almost negligible. The resin exhibits high adsorption affinity for gallium while demonstrating minimal adsorption for aluminum.
研究领域:
冶金学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2024
·
IF 4.7
Zhi-peng XU,Zuo-wei LIU,Xue-yi GUO,Dong LI,Ming-jin ZOU,Qing-hua TIAN
A process for gallium recovery by cyclone electrowinning was proposed to inhibit concentration polarization and improve current efficiency (CE). The diffusion coefficient of GaO 2 − in 120 g/L NaOH solution was determined to be 1.65×10 −7 cm 2 /s by electrochemical study. The effect of various parameters on gallium electrowinning was investigated, and the optimum conditions were determined as: titanium cathode, current density of 750 A/m 2 , gallium concentration of 39.9 g/L, NaOH concentration of 120 g/L, and circulation flow of 200 L/h. Under these conditions, the CE and gallium recovery of electrowinning were 47.9% and 90.2%, respectively. The precipitated gallium can be easily separated from the cathode, and the final purity of gallium after washing was 99.993%. The energy consumption (EC) of gallium cyclone electrowinning was about 9048 kW·h/t. Overall, it is suggested that cyclone electrowinning is a promising process for gallium production with high CE and low EC.
研究领域:
冶金工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zuowei Liu,Qinghua Tian,Xueyi Guo,Yasong Huang,Zhipeng Xu
Traditional gallium electrowinning suffers from low current efficiency and high specific energy consumption due to the inevitable hydrogen evolution reaction. In order to inhibit hydrogen evolution reaction and alleviate the concentration polarization, the pulse cyclone electrowinning process was proposed and developed to enhance diffusion and convection. During the pulse current off time, the ion concentration in the cathode diffusion layer can be effectively restored, while forced convection accelerates this process. Electrochemical experiments using a rotating disk electrode have preliminarily confirmed that pulsed electrodeposition can accelerate nucleation and improve current efficiency. Pilot experiments were conducted using an industrial gallium electrolyte to further validate the feasibility of the pulse cyclone electrowinning process. Under the following conditions: current density of 2000 A/m 2 , duty ratio of 50%, frequency of 10 Hz, and circulation flow of 400 L/h, the current efficiency and specific energy consumption were determined to be 69.21% and 7836 kWh/t, respectively. Compared to the traditional electrowinning process at the same average current density, pulse cyclone electrowinning exhibited a significant increase in current efficiency and a reduction in specific energy consumption by 52.28% and 31.57%, respectively. Overall, this study confirmed the feasibility of pulse cyclone electrowinning coupling pulse current and forced convection, which can also be applied to other electrodeposition processes to achieve higher current efficiency and lower energy consumption.
研究领域:
冶金工程
·
电化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Gangan Wang,Chaoyi Chen,Junqi Li,Fan Yang,Linzhu Wang,Xin Lin,Hao Wu,Jun Zhang
Brown corundum fly ash (BCFA) is a solid waste from the brown corundum smelting process that contains abundant Ga, K, Si, and Al, but effectively extracting Ga can be challenging since most of it is located inside the particles. This study proposes a comprehensive utilization method of BCFA that combines hydrothermal leaching and alkali regeneration to extract Ga efficiently while producing silica-potassium compound fertilizer (SPCF) and zeolite F. By utilizing the transformation of phase and structure in the hydrothermal leaching process, Ga extraction is efficiently achieved. The results showed that under the conditions of 210 g/L KOH concentration, a liquid solid ratio of 25 mL/g, and 160 °C hydrothermal leaching for 60 min, the extraction efficiencies of Ga, K, and Si were 95.91 %, 51.78 %, and 69.57 %, respectively. The solid product’s effective SiO 2 and K 2 O contents increased to 24.72 wt% and 17.74 wt%, respectively, which can be further used as SPCF for agricultural production. The hydrothermal leaching solution was regenerated by adjusting the Al/Si molar ratio and crystalizing at 160 °C for 24 h. The Si was recovered in the form of high value-added zeolite F, with only a 3.60 % loss of Ga.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Shuyang Shi,Chen Yang,Baozhong Ma,Hui Yang,Zhihe Cao,Yubo Liu,Yongqiang Chen,Chengyan Wang
Ga exhibits enrichment in coal-based solid waste, establishing it as a promising alternative source for Ga recovery. The HNO 3 pressure leaching process effectively achieves simultaneous leaching of Al and Ga while retaining most of the Fe in the residue. However, separating Ga from acidic solutions containing Fe and Al remains a persistent challenge in hydrometallurgy due to their similar physicochemical properties. Herein, a simplified and effective two-stage sequential solvent extraction process using acid phosphorus extractants (P507 and P204) for selective Ga recovery was proposed. Under optimized conditions, P507 removed 97.2 % of Fe from coal gangue HNO 3 leach liquor with limited co-extraction of Ga (10.1 %) and Al (5.7 %). Subsequent P204 extraction recovered 99.2 % Ga with only 9.1 % Al co-extraction from the Fe raffinate. Stripping with 2 mol·L –1 H 2 SO 4 yielded 88.0 % Ga recovery, with the extractants showing excellent regeneration and cycling performance. Mechanistic studies including FT-IR, UV-Vis, ESI-MS, and stoichiometric analysis confirmed coordination through both P = O and P–O–H groups, forming Fe(HA)A 3 and Ga(HL)L 3 complexes (A = P507; L = P204 ligands), respectively. This study presents a highly efficient approach for the separation of Fe/Ga/Al and Ga recovery from HNO 3 leach liquor, featuring exceptionally low acid depletion.
研究领域:
湿法冶金
·
溶剂萃取
·
资源回收
·
无机化学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jiaxin Luo,Yihui Wu,Dawei Xiang,Shixing Wang,Jianqiang Ye,Hongliang Liu,Libo Zhang
Gallium is a strategic metal extensively applied in semiconductors, optoelectronics, and LED manufacturing. However, extracting Ga(III) from aqueous solutions remains challenging due to its typically low concentrations and interference from coexisting metal ions. In this study, a novel cross-linked COF-COF material (DPDA), enriched with nitrogen- and oxygen-containing functional groups, was synthesized and systematically evaluated for its ability to selectively adsorb Ga(III) from complex aqueous systems. DPDA exhibited outstanding adsorption performance under alkaline conditions and showed significantly enhanced Ga(III) uptake compared with its precursor. Kinetic analysis revealed that the adsorption process followed a pseudo-second-order model, indicating chemisorption played a predominant role. Langmuir isotherm fitting further demonstrated a monolayer adsorption pattern, yielding a maximum capacity of 112.4 mg·g −1 at 318 K. DPDA exhibited strong affinity for Ga(III) even in the presence of competing metal ions. In terms of reusability, DPDA maintained more than 67 % of its removal efficiency after 16 successive adsorption-desorption cycles, highlighting its structural robustness and practical applicability. Mechanistic analysis indicated that Ga(III) uptake by DPDA proceeds through a combination of coordination chemisorption, ion-exchange processes, and electrostatic interactions. DFT calculations identified stable adsorption configurations and quantified adsorption energies, confirming the synergistic contribution of -OH and -NH groups to Ga(III) binding. This work provides deeper insight into Ga(III) adsorption mechanisms and proposes a practical approach for its selective recovery from complex aqueous environments.
✓ 已验证
产品关联
DOI
高影响因子
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