Synthesis and characterization of a new ion-imprinted polymer for the selective separation of thorium(iv) ions at high acidity

Abstract

A new ion-imprinted polymer (IIP), which was synthesized with bis(2-methacryloxyethyl) phosphate as functional ligand and Th4+ as a template ion, can be used in high acidity environment.

Highly Efficient Removal of Thorium in Strong HNO3 Media Using a Novel Polymer Adsorbent Bearing a Phosphonic Acid Ligand: A Combined Experimental and Density Functional Theory Study

“…Generally, liquid–liquid extraction has been widely employed for the extraction of Th­(IV) from a highly acidic solution. ,, However, liquid–liquid extraction has some disadvantages such as large amounts of waste formation and large-scale extraction equipment, which would restrict its wide-ranging application in the nuclear industry. Recently, solid-phase extraction has been widely employed for the effective extraction of thorium from water media due to its high recovery, high enrichment factor, and lower consumption and cost. − To date, many materials including synthetic polymers, silicon materials, and graphene oxide have been employed as adsorbents for the removal of thorium from the high concentration of acid. − Generally, the concentration of organic chelating ligands anchored on the solid-phase extractants has an obvious effect on the adsorption efficiency. However, most of the thorium-complexing ligands were often grafted onto the surface of the adsorbents via the chemical modification method with a low grafting yield, resulting in inferior sorption capacity and bad selectivity on these sorbents. , Thus, it is an important task to develop a convenient method to synthesize a novel adsorbent for the highly efficient extraction of thorium in strong acidic media.…”

Selective Separation and Preconcentration of Thorium(IV) in Bastnaesite Ore Using Thorium(IV)-Imprinted Cryogel Polymer

“…The flow rate of the Th(IV) solution pumped through the cryogel is one of the crucial parameter for the control of binding process [51]. The flow rate effect on the binding of Th(IV) was explored by changing the flow rate from 1.0 to 5.0 mL.min -1 .…”

A novel ion-imprinted amidoxime-functionalized UHMWPE fiber based on radiation-induced crosslinking for selective adsorption of uranium

“…33,34 The typical procedure of this method is mainly based on the introduction of template particles in the preparation of crosslinked materials by crosslinking reagents followed by elution of the templates, thus endowing the adsorbent material with the ability of selectively identifying and coordinating particles that are similar in spatial size and structure to the template. 35 In recent years, much attention has been paid to the synthesis of uranium ionimprinted adsorbents, such as ion-imprinted mesoporous silica, 36 surface ion-imprinted polymers, 37 imprinted porous aromatic frameworks, 34 and ion-imprinted magnetic microspheres. 38 However, almost all ion imprinting techniques involve a crosslinking reagent, leading to complicated preparation processes.…”