来源：ACS PublicationsThe rising demand for Rare Earth Elements (REEs) highlights the need for sustainable cost-effective extraction methods, particularly from secondary sources, such as coal-related materials. Recovering REEs from these resources supports domestic supply security while reducing waste. This study evaluates the techno-economic feasibility of producing RE-hydroxide from coal-related materials using a chemical recycling process that recovers 90% of reagents, including 2.5 tons of soda ash and 9.5 tons of water. The process requires $35 million in initial capital investment and yield...
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2025
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09
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来源：ACS PublicationsTransitioning to green energy requires more sustainable rare earth element (REE) production. The current REE supply relies on energy- and chemical-intensive mining, prompting interest in alternative sources like phosphogypsum (PG) waste. However, using conventional solvent extraction to recover REEs in PG is inefficient and environmentally burdensome. This study proposes a treatment train for REE recovery from PG, featuring a bioinspired adsorptive separation, and evaluates its environmental and economic performance using a probabilistic sustainability framework that integra...
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2025
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09
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来源：ACS PublicationsThe wettability of rare earth oxides (REOs) including the lanthanide series, scandium, and yttrium has become a subject of increasing interest and debate. While many studies report hydrophobic behavior with high water contact angles, emerging evidence indicates that pristine REO surfaces are intrinsically hydrophilic, and that hydrophobicity arises primarily from extrinsic surface contamination by volatile organic compounds. This perspective examines the contrasting viewpoints on REO surface wettability, integrating insights from surface structure, electronic configura...
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2025
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09
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来源：ACS PublicationsThe compound Sm3Ge5 adopts two modifications with Pearson symbols hP16 (AlB2-derivative) and oF64 (defect α-ThSi2-type) upon synthesis at ambient pressure. Synthesis at extreme conditions grants access to the modification oS32 (Pu3Pd5-type). High-pressure high-temperature treatment of prereacted element mixtures yields Pu3Pd5-type Sm3Ge5, space group Cmcm with lattice parameters a = 9.42813(9), b = 7.56296(7), and c = 9.67056(8) Å. The atomic arrangement refined from powder X-ray diffraction data is confirmed by transmission electron microscopy measurements. The c...
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2025
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