Coordination chemistry of surface-associated ligands for solid-liquid adsorption of rare-earth elements  

作　　者：Jessica L.Hovey Timothy M.Dittrich Matthew J.Allen 

机构地区：[1]Department of Chemistry,Wayne State University,5101 Cass Avenue,Detroit,MI,48202,USA [2]Department of Civil and Environmental Engineering,5050 Anthony Wayne Drive,Wayne State University,Detroit,MIl,48202,USA

出　　处：《Journal of Rare Earths》2023年第1期1-18,共18页稀土学报（英文版）

基　　金：Project supported by the U.S.Army Engineer Research and Development Center (W912HZ-21-2-0048)。

摘　　要：General guidelines for the design of ligands for the enrichment of rare-earth elements by solid-liquid adsorption are described using coordination chemistry.Relevant properties of ligands include selectivity of metal ions based on adjustment of donor atom polarizability,denticity,and the pKarange of the binding sites.The selectivity of solid-phase materials for the enrichment of rare-earth ions by the ligand design guidelines is outlined,with special consideration of additional variable factors including steric hindrance,saturated binding sites,variability in speciation caused by the identity of counterions and ionic strength,and size-exclusivity in ligands stemming from differences in bite angle,preo rganization of ligands,or intraligand interactions.This review analyzes some principles of selectivity of rare-earth elements with ligands organized by donor type from examples collected from reports published between 2009 and 2021.

关 键 词：Chelating ligand Coordination chemistry Solid-phase material Rare-earth element SEPARATION Solid-liquid extraction 

分 类 号：P618.7[天文地球—矿床学]