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Precious Metal Recovery Technologies for E-waste

     

The development of precious metal recovery technologies for e-waste (Waste Electrical and Electronic Equipment) is showing a trend of green, systematic and refined advancement. Going forward, it is necessary to further strengthen multi-technology coupling and full life cycle assessment (LCA), so as to achieve the synergistic development of resource recovery and environmental protection.

Despite the strengths of simple process flow and high recovery rate in e-waste precious metal recovery, pyrometallurgical technology still faces bottlenecks such as high energy consumption and environmental pollution. Cutting-edge processes represented by hydrogen-based smelting systems need to be developed to facilitate its green transition.

Biometallurgical technology has great potential in the precious metal recovery field thanks to its advantages of environmental friendliness and low cost. Although it currently has shortcomings including long leaching cycles and low leaching efficiency, its recovery rate and treatment efficiency have been significantly improved through optimization approaches such as strain engineering and nano-enhancement technologies.

Hydrometallurgical technology currently dominates e-waste precious metal recovery due to its low cost and easy operation. However, it is confronted with the challenge of highly toxic substance management and regulation. Future efforts should focus on the development of novel coordinating agents, to push the technical system to evolve in a high-efficiency, green and cost-effective direction.

Emerging technologies, including nanomaterials, biomass-derived materials and genetically engineered microorganisms, have demonstrated broad application prospects in e-waste precious metal recovery, and are expected to lead the in-depth transformation of recovery technologies towards precision, low-carbon and circular operation models.

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