Ion imprinted polymers for selective recognition and separation of lanthanum and cerium ions from other lanthanide. Issue 17 (21st November 2016)

• Record Type: Journal Article
• Authors: Nik Mustapa, Nik Rohani; Malek, Nor Fazli A.; Yusoff, Mashitah Mohd; Rahman, Md Lutfor
• Is Part Of: Separation science and technology. Volume 51:Issue 17(2016)
• Page Start: 2762
• Page End: 2771
• Publication Date: 2016-11-21
• Subjects: Azobenzene-based ligand -- La(III) and Ce(III) ion-imprinted polymers -- Schiff base ligand -- separation; Separation (Technology) -- Periodicals; 660.284205
• DOI: 10.1080/01496395.2016.1225091
• Languages: English
• ISSNs: 0149-6395

Abstract

ABSTRACT: The lanthanide-ion-imprinted polymers (L-IIPs) were synthesized from La 3+ or Ce 3+ ion and complexing agents either Schiff base or azobenzene with ethylene glycol-dimethylacrylate as cross-linking agent, 4-vinylpyridine monomer and 2, 2-azobisisobutyronitrile initiator. After polymerization, cavities in the polymer particles corresponding to the La 3+ /Ce 3+ ions were created by leaching in 20 mL of HCl solution (2.0 mol L −1 ). The maximum sorption capacity is found to be 25.0, 24.3, 24.5 and 24.7 mg g −1 of La-IIP-Schiff, La-IIP-Azo, Ce-IIP-Schiff, Ce-IIP-Azo polymers, respectively at pH 6. The L-IIPs gave good selectivity to La or Ce ions in the presence of other selected lanthanide cations with close atomic radius. The L-IIPs were reused and regenerated for ten times without a significant decrease in binding affinity.