Citric Acid Used to Leach Rare Earth Elements from Roasted Coal Gangue
Researchers have investigated the process of extracting rare earth elements (REEs) from roasted coal gangue using citric acid. Coal gangue, a byproduct of coal mining, often contains valuable REEs. The study focused on understanding the specific mechanisms and behaviors involved in this leaching process. Citric acid, a weak organic acid, was employed as the lixiviant. The research aimed to optimize conditions for efficient REE recovery. This work contributes to the development of methods for utilizing mining waste as a resource for critical elements. Understanding the leaching kinetics and the factors influencing REE solubility is crucial for industrial application. The findings could pave the way for more sustainable REE sourcing.
This research explores a novel approach to REE extraction from coal gangue, a significant industrial waste stream. By employing citric acid, the study seeks to develop a potentially more environmentally benign leaching agent compared to traditional strong acids. The focus on understanding the fundamental mechanisms and behaviors of REE leaching is critical for optimizing recovery efficiency and minimizing operational costs. This investigation aligns with broader efforts to establish circular economy principles within the mining sector, transforming waste materials into valuable resources. Future work may involve scaling up the process and assessing its economic viability and environmental footprint in comparison to existing REE extraction technologies.
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