Selective uranyl ion-imprinting with clickable amidoxime-functionalized pullulan.

Manufacturing a highly effective sorbent for removing UO ions from aqueous effluents is vital for safeguarding the environment and recovering valuable resources. This research presents an innovative strategy employing adsorbents derived from pullulan, specifically tailored with furfuryl-amidoxime (FAO), to improve their affinity for UO ions. The formation of a UO ion-imprinted sorbent (U-II-P) was achieved by crosslinking the UO/FAO-modified pullulan (FAO-P) complex with bis(maleimido)ethane (BME) via click Diels-Alder (DA) cyclization, enhancing its attraction and specificity for UO ions.

Ion-imprinted aminoguanidine-chitosan for selective recognition of lanthanum (III) from wastewater.

Developing a sorbent for the removal of La ions from wastewater offers significant environmental and economic advantages. This study employed an ion-imprinting process to integrate La ions into a newly developed derivative of aminoguanidine-chitosan (AGCS), synthesized via an innovative method. The process initiated with the modification of chitosan by attaching cyanoacetyl groups through amide bonds, yielding cyanoacetyl chitosan (CAC).