Toward circular Gallium: Recovery pathways from Bayer Liquor, red Mud, fly Ash, and e-waste
Xurui Zhang1, Zhiyuan Zhang1, Jintao Fu1
1School of Chemical Engineering & Zhongyuan Critical Metals Laboratory, Zhengzhou University, Zhengzhou 450001, China.
Waste Management (New York, N.Y.)
|April 20, 2026
Summary
Gallium recovery from industrial waste is crucial for sustainable technology. This review highlights efficient methods to recycle over 80% of dissipated gallium, boosting supply resilience.
Area of Science:
- Materials Science
- Chemical Engineering
- Environmental Science
Background:
- Gallium is vital for semiconductors, LEDs, and photovoltaics.
- Current gallium recovery methods are inefficient, leading to significant material loss.
- Over 80% of gallium generated between 2001-2021 was dissipated, indicating systemic inefficiencies.
Purpose of the Study:
- To review and map the full chain of gallium recovery, focusing on waste and residue pathways.
- To synthesize technological progress in gallium recovery, evaluating energy, reagents, and emissions.
- To propose a roadmap for sustainable gallium recycling and supply chain resilience.
Main Methods:
- Comprehensive literature review of gallium recovery technologies.
- Benchmarking of various recovery techniques (leaching, separation, refining) based on techno-environmental factors.
- Analysis of supply risks, policy implications, and circular economy strategies.
Main Results:
- Identified primary by-product streams (Bayer liquor, red mud) and secondary resources (e-waste, LEDs, end-of-life solar panels, fly ash) for gallium recovery.
- Evaluated cleaner recovery routes like bioleaching, electrochemical recovery, and functionalized sorbents.
- Highlighted the potential to divert significant gallium from dissipation to high-value recycling.
Conclusions:
- Scalable recovery from alumina production waste and robust e-waste/PV recycling infrastructure are essential.
- Development of next-generation green separation materials can enable closed-loop gallium flows.
- Implementing these strategies will strengthen gallium supply resilience and promote cleaner production of critical metals.
Keywords:
Bayer liquor and red mudCircular economyE-waste and PV end-of-lifeGallium recoveryTechno-environmental assessmentMore Related Videos
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