Separation of gallium from acid leachates of zinc smelting slag by tartaric acid coordinated complexation and anion-exchange

IF 4.8 2区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Hydrometallurgy Pub Date : 2025-09-29 DOI:10.1016/j.hydromet.2025.106581

Mingwei Qi , Minyu Zhu , Hao Chen , Yun Liu , Zhiqiang Lin , Zezuo Jiang , Jing Wu , Chunlin He

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引用次数: 0

Abstract

The rapid advancement of strategic technologies, including semiconductor manufacturing, 5G infrastructure, renewable energy systems, and aerospace engineering, has driven a surge in global demand for gallium (Ga). To address this need, secondary resources such as zinc smelting slag have emerged as a critical source for gallium recovery. This study proposes a novel strategy for gallium recovery by leveraging the ligand complexation capability of tartaric acid to convert Ga(OH)₃ into negatively charged complexes([GaO₂(OH)C₄H₂O₄]₂⁴⁻), followed by selective adsorption using a polystyrene-based anion-exchange resin (D201 × 7). The results demonstrated that the maximum adsorption capacity was 138 mg/g at pH 4, T = 328 K, t = 45 min and 1:1 M ratio of tartaric acid with Ga. The adsorption process conformed to the pseudo-second-order kinetic and Langmuir isotherm models. The primary mechanism for the adsorption of Ga(III) involved complexation with tartaric acid to form an anionic species and undergo ion exchange via the Cl⁻ functional groups on the D201 × 7 resin. The column experiment demonstrated highly selective adsorption efficiency of Ga(III) in the presence of various interfering metal ions. This study provides a feasible alternative for the separation of Ga(III) from industrial zinc slag processing in sulfuric acid systems and has broad application prospects.

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酒石酸配位-阴离子交换法分离锌渣酸性浸出液中镓

半导体制造、5G基础设施、可再生能源系统和航空航天工程等战略技术的快速发展，推动了全球对镓（Ga）的需求激增。为了满足这一需求，锌冶炼渣等二次资源已成为镓回收的重要来源。本研究提出了一种新的镓回收策略，利用酒石酸的配体络合能力将Ga(OH)3转化为带负电荷的配合物（[GaO2(OH)C4H2O4]24−），然后使用聚苯乙烯基阴离子交换树脂（D201 × 7）进行选择性吸附。结果表明，在pH为4、温度为328 K、温度为45 min、酒石酸与Ga浓度为1:1的条件下，酒石酸的最大吸附量为138 mg/g。吸附过程符合拟二级动力学模型和Langmuir等温模型。D201 × 7树脂吸附Ga（III）的主要机理是与酒石酸络合形成阴离子，并通过Cl -官能团进行离子交换。柱实验表明，在多种干扰金属离子存在下，镓（III）具有较高的选择性吸附效率。本研究为工业锌渣在硫酸体系中分离镓（III）提供了一种可行的选择，具有广阔的应用前景。

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来源期刊

Hydrometallurgy 工程技术-冶金工程

CiteScore

9.50

自引率

6.40%

发文量

144

审稿时长

3.4 months

期刊介绍： Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties. Topics covered include: leaching of metal values by chemical reagents or bacterial action at ambient or elevated pressures and temperatures; separation of solids from leach liquors; removal of impurities and recovery of metal values by precipitation, ion exchange, solvent extraction, gaseous reduction, cementation, electro-winning and electro-refining; pre-treatment of ores by roasting or chemical treatments such as halogenation or reduction; recycling of reagents and treatment of effluents.