来源：ACS PublicationsRare earth elements exhibit unique physicochemical properties that justify their broad technological applications and rising global demand. Concerns about supply risks and resource scarcity have intensified the search for alternative supply routes and secondary sources. In this study, rare earth elements were recovered from an acidic effluent generated during the hydrometallurgical processing of columbite. Citric acid was used as a complexing agent to promote metal differentiation, and its effects on selective precipitation and solvent extraction were evaluated. Complexation...
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2026
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来源:ACS PublicationsRare earth elements are critical to decarbonization, advanced electronics, and defense applications. Traditional hydrometallurgical recovery using liquid–liquid solvent extraction (SX) and classical ion exchange, however, requires the use of volatile organic diluents, high chemical consumption, and multiple-stage cascades, which produce significant amounts of saline and acidic effluents. Solvent-impregnated resins (SIRs), polymer inclusion membranes (PIMs), microbeads (PIBs), and cross-linked networks are environmentally friendly polymeric sorbents, which can greatly reduce ...
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2026
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来源：ACS Publications Rare earth elements (REEs) are irreplaceable in advanced new materials and high-end manufacturing industries. However, their nearly identical physicochemical properties, coupled with the associated diverse impurities, render the full separation of REEs a long-standing and formidable challenge in analytical separation science. In this work, a novel phosphate ester-functionalized cation-exchange stationary phase (Sil-PCX) was successfully developed for the first time via a simple inorganic phosphate-mediated synthesis. Benefiting from the moderate ion-exchange charac...
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2026
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来源：ACS PublicationsThe efficient recovery of rare-earth elements (REEs) from wastewater is crucial for resource utilization and environmental protection. Developing adsorbents with green fabrication processes, biodegradability, and carbon circularity is of great significance for achieving a sustainable wastewater treatment and resource recovery. In this study, a fully biobased phosphorus-rich microsphere (PA@CS) was prepared through a simple one-step cross-linking reaction to selectively adsorb heavy rare earth elements (HREEs). The adsorption kinetics were described by the pseudo-second-order...
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2026
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