Synthesis and characterisation of metal ion-imprinted polymers for separation of selective rare earth elements

Synthesis and characterisation of metal ion-imprinted polymers for separation of selective rare earth elements

Ion imprinted polymers (IIPs) have received much attention in diverse fields owing to their high selectivity for targeted metal ions. In the present study, lanthanide-ion imprinted polymers (L-IIPs) were synthesised by dissolving stoichiometric amounts of lanthanum ion and selected complexing agents...

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Main Author: Nik Rohani, Nik Mustapa
Format: Thesis
Language:English
English
English
Published: 2018
Subjects:
Q Science (General)
T Technology (General)
Online Access:http://umpir.ump.edu.my/id/eprint/24766/
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http://umpir.ump.edu.my/id/eprint/24766/1/Synthesis%20and%20characterisation%20of%20metal%20ion-imprinted%20polymers%20for%20separation%20of%20selective%20rare%20earth%20elements%20-%20Table%20of%20contents.pdf
http://umpir.ump.edu.my/id/eprint/24766/2/Synthesis%20and%20characterisation%20of%20metal%20ion-imprinted%20polymers%20for%20separation%20of%20selective%20rare%20earth%20elements%20-%20Abstract.pdf
http://umpir.ump.edu.my/id/eprint/24766/3/Synthesis%20and%20characterisation%20of%20metal%20ion-imprinted%20polymers%20for%20separation%20of%20selective%20rare%20earth%20elements%20-%20References.pdf
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spelling ump-247662019-05-30T03:09:12Z http://umpir.ump.edu.my/id/eprint/24766/ Synthesis and characterisation of metal ion-imprinted polymers for separation of selective rare earth elements Nik Rohani, Nik Mustapa Q Science (General) T Technology (General) Ion imprinted polymers (IIPs) have received much attention in diverse fields owing to their high selectivity for targeted metal ions. In the present study, lanthanide-ion imprinted polymers (L-IIPs) were synthesised by dissolving stoichiometric amounts of lanthanum ion and selected complexing agents either Schiff bases, azobenzene base ligands and also indole compounds with solvent in the presence of cross-linking agent (ethylene glycol dimethacrylate (EGDMA)), functional monomer (4-vinylpyridine), and initiator (2,2-azobisisobutyronitrile (AIBN)). The cavities in the polymer materials corresponding to the specific lanthanide ions were created by leaching the polymer using aqueous HCl solution after polymerization. The complete removal of the lanthanide ions from the L-IIPs were confirmed by ICP-MS, FESEM and solid state analysis by UV-vis NIR spectroscopy. FTIR study confirmed the complexation between the L-IIPs and lanthanide ions through the nitrogen, hydroxyl oxygen and sulphur of Schiff base, azobenzene base ligands and indole compounds. At optimum (pH 6), the maximum sorption capacity achieved by the L-IIPs are estimated to be La-IIP-Schiff (25.0 mg g-1), La-IIP-Azo (24.3 mg g-1), Ce-IIP-Schiff (24.5 mg g-1), Ce-IIP-Azo (24.7 mg g-1), Pr-IIP-Schiff (125.3 mg g-1), Nd-IIP-Schiff (126.5 mg g-1), Sm-IIP-Schiff (127.6 mg g-1), Eu-IIP-Schiff (128.2 mg g-1) and Gd-IIP-Schiff (129.1 mg g-1). In the selectivity study, the L-IIPs were found to show good selectivity to the praseodymium, gadolinium, europium, samarium, cerium, neodymium and lanthanum ion in the presence of coexisting cation, promethium. It was found that imprinting results increased the affinity of the material toward several lanthanide ions over other competitor metal ions with the same charge and similar ionic radii. The synthesized L-IIPs were repeatedly used and regenerated for 8 times without a significant decrease in polymer binding affinity. 2018-02 Thesis NonPeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/24766/1/Synthesis%20and%20characterisation%20of%20metal%20ion-imprinted%20polymers%20for%20separation%20of%20selective%20rare%20earth%20elements%20-%20Table%20of%20contents.pdf pdf en http://umpir.ump.edu.my/id/eprint/24766/2/Synthesis%20and%20characterisation%20of%20metal%20ion-imprinted%20polymers%20for%20separation%20of%20selective%20rare%20earth%20elements%20-%20Abstract.pdf pdf en http://umpir.ump.edu.my/id/eprint/24766/3/Synthesis%20and%20characterisation%20of%20metal%20ion-imprinted%20polymers%20for%20separation%20of%20selective%20rare%20earth%20elements%20-%20References.pdf Nik Rohani, Nik Mustapa (2018) Synthesis and characterisation of metal ion-imprinted polymers for separation of selective rare earth elements. Masters thesis, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:103180&theme=UMP2
repository_type Digital Repository
institution_category Local University
institution Universiti Malaysia Pahang
building UMP Institutional Repository
collection Online Access
language English
English
English
topic Q Science (General)
T Technology (General)
spellingShingle Q Science (General)
T Technology (General)
Nik Rohani, Nik Mustapa
Synthesis and characterisation of metal ion-imprinted polymers for separation of selective rare earth elements
description Ion imprinted polymers (IIPs) have received much attention in diverse fields owing to their high selectivity for targeted metal ions. In the present study, lanthanide-ion imprinted polymers (L-IIPs) were synthesised by dissolving stoichiometric amounts of lanthanum ion and selected complexing agents either Schiff bases, azobenzene base ligands and also indole compounds with solvent in the presence of cross-linking agent (ethylene glycol dimethacrylate (EGDMA)), functional monomer (4-vinylpyridine), and initiator (2,2-azobisisobutyronitrile (AIBN)). The cavities in the polymer materials corresponding to the specific lanthanide ions were created by leaching the polymer using aqueous HCl solution after polymerization. The complete removal of the lanthanide ions from the L-IIPs were confirmed by ICP-MS, FESEM and solid state analysis by UV-vis NIR spectroscopy. FTIR study confirmed the complexation between the L-IIPs and lanthanide ions through the nitrogen, hydroxyl oxygen and sulphur of Schiff base, azobenzene base ligands and indole compounds. At optimum (pH 6), the maximum sorption capacity achieved by the L-IIPs are estimated to be La-IIP-Schiff (25.0 mg g-1), La-IIP-Azo (24.3 mg g-1), Ce-IIP-Schiff (24.5 mg g-1), Ce-IIP-Azo (24.7 mg g-1), Pr-IIP-Schiff (125.3 mg g-1), Nd-IIP-Schiff (126.5 mg g-1), Sm-IIP-Schiff (127.6 mg g-1), Eu-IIP-Schiff (128.2 mg g-1) and Gd-IIP-Schiff (129.1 mg g-1). In the selectivity study, the L-IIPs were found to show good selectivity to the praseodymium, gadolinium, europium, samarium, cerium, neodymium and lanthanum ion in the presence of coexisting cation, promethium. It was found that imprinting results increased the affinity of the material toward several lanthanide ions over other competitor metal ions with the same charge and similar ionic radii. The synthesized L-IIPs were repeatedly used and regenerated for 8 times without a significant decrease in polymer binding affinity.
format Thesis
author Nik Rohani, Nik Mustapa
author_facet Nik Rohani, Nik Mustapa
author_sort Nik Rohani, Nik Mustapa
title Synthesis and characterisation of metal ion-imprinted polymers for separation of selective rare earth elements
title_short Synthesis and characterisation of metal ion-imprinted polymers for separation of selective rare earth elements
title_full Synthesis and characterisation of metal ion-imprinted polymers for separation of selective rare earth elements
title_fullStr Synthesis and characterisation of metal ion-imprinted polymers for separation of selective rare earth elements
title_full_unstemmed Synthesis and characterisation of metal ion-imprinted polymers for separation of selective rare earth elements
title_sort synthesis and characterisation of metal ion-imprinted polymers for separation of selective rare earth elements
publishDate 2018
url http://umpir.ump.edu.my/id/eprint/24766/
http://umpir.ump.edu.my/id/eprint/24766/
http://umpir.ump.edu.my/id/eprint/24766/1/Synthesis%20and%20characterisation%20of%20metal%20ion-imprinted%20polymers%20for%20separation%20of%20selective%20rare%20earth%20elements%20-%20Table%20of%20contents.pdf
http://umpir.ump.edu.my/id/eprint/24766/2/Synthesis%20and%20characterisation%20of%20metal%20ion-imprinted%20polymers%20for%20separation%20of%20selective%20rare%20earth%20elements%20-%20Abstract.pdf
http://umpir.ump.edu.my/id/eprint/24766/3/Synthesis%20and%20characterisation%20of%20metal%20ion-imprinted%20polymers%20for%20separation%20of%20selective%20rare%20earth%20elements%20-%20References.pdf
first_indexed 2023-09-18T22:37:41Z
last_indexed 2023-09-18T22:37:41Z
_version_ 1777416704901513216

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