Selective Cu(II) Adsorption from Aqueous Solutions Including Cu(II), Co(II), and Ni(II) by Modified Acrylic Acid Grafted PET Film

Nazia Rahman,Kazuhiro Hara,Hirotaka Okabe,Satoru Yoshioka,Nobuhiro Sato,Masaaki Sugiyama

doi:10.1155/2013/536314

Nazia Rahman, Kazuhiro Hara + Show 4 more

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https://doi.org/10.1155/2013/536314

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Journal: ISRN Polymer Science	Publication Date: Jul 29, 2013
Citations: 26	License type: CC BY 3.0

Affiliation: Kyushu University, Kyoto University

Abstract

Acrylic acid (AAc) grafted polyethylene terephthalate (PET) films were prepared by γ irradiation. The graft films showed little metal ion adsorption due to compact structure of the graft chains as shown by the scanning electron microscopy (SEM) images which restricted the access of metal ions to the functional groups. Therefore, the graft films were modified with KOH treatment for expansion of the graft chains to facilitate the access of metal ions to the functional groups. The modified films were used to study the selective Cu2+ adsorption from aqueous solution containing Cu2+, Co2+, and Ni2+. Langmuir and Freundlich isotherm models were used for interpretation of selective equilibrium adsorption data and Langmuir model showed better fitting with experimental data. Again pseudo-first-order and pseudo-second-order equations were used for interpretation of selective kinetic adsorption data and pseudo-second-order equation showed better prediction of experimental data. The adsorbent film showed high selectivity towards Cu2+ in presence of Cu2+, Co2+, and Ni2+ in the pH range of 1.5 to 4.5. Desorption and reuse of the adsorbent film were also studied which indicated that the film can be used repeatedly for selective Cu2+ sorption from aqueous solution.

Highlights

Heavy metals have received much public attention as potential hazards for human life and health ignited by the well-known environmental destruction cases: Minamata disease and itai-itai disease and the stricter environmental regulations on the discharge of heavy metals make it necessary to develop efficient and low cost technologies for their removal [1]
The modified films were used to study the potential of selective Cu2+ adsorption from aqueous solution containing Cu2+, Co2+, and Ni2+ focusing with the four main objectives: (1) characterization of modified Acrylic acid (AAc) grafted polyethylene terephthalate (PET) films by Fourier transform infrared (FTIR) and scanning electron microscopy (SEM), (2) studying the equilibrium adsorption isotherm of selective Cu2+ adsorption from ternary metal solutions of Cu2+, Co2+, and Ni2+ and use of Langmuir and Freundlich isotherm models for interpretation of equilibrium adsorption data, (3) studying the kinetic of selective Cu2+ adsorption from ternary metal solutions of Cu2+, Co2+, and Ni2+ and use of pseudo-first-order and pseudo-second-order equations for interpretation of adsorption kinetic data, and (4) studying the desorption of metal ions from the film and reuse of the film
AAc grafting on PET film might have followed

Summary

Introduction

Heavy metals have received much public attention as potential hazards for human life and health ignited by the well-known environmental destruction cases: Minamata disease (organic mercury poisoning) and itai-itai disease (cadmium poisoning) and the stricter environmental regulations on the discharge of heavy metals make it necessary to develop efficient and low cost technologies for their removal [1]. ISRN Polymer Science for the adsorption of hazardous heavy metal ion from water which demonstrated good potential of PET-based adsorbents in heavy metal removal. The modified films were used to study the potential of selective Cu2+ adsorption from aqueous solution containing Cu2+, Co2+, and Ni2+ focusing with the four main objectives: (1) characterization of modified AAc grafted PET films by FTIR and SEM, (2) studying the equilibrium adsorption isotherm of selective Cu2+ adsorption from ternary metal solutions of Cu2+, Co2+, and Ni2+ and use of Langmuir and Freundlich isotherm models for interpretation of equilibrium adsorption data, (3) studying the kinetic of selective Cu2+ adsorption from ternary metal solutions of Cu2+, Co2+, and Ni2+ and use of pseudo-first-order and pseudo-second-order equations for interpretation of adsorption kinetic data, and (4) studying the desorption of metal ions from the film and reuse of the film

Experimental

Results and Discussion

Conclusion