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Mesoporous MgO/PPG Hybrid Nanofibers: Synthesis, Optimization, Characterization and Heavy Metal Removal Property

Abstract

In this paper, mesoporous magnesium oxide/ polypropylene glycol (MgO/PPG) hybrid nanofibers were synthesized as a new adsorbent for the removal of heavy metal ions from solutions. To do this, at first, mesoporous MgO nanofibers were prepared by electrospinning technique. Then, a polymeric layer containing PPG was deposited onto the surface of MgO nanofibers. Aiming to produce hybrid nanofibers with mesoporous structure, the amount of PPG containing layer was optimized. The characteristic analyses showed a high specific surface area value (185m2/g) even after the deposition of polymeric layer. Although, the mean mesopore size on the nanofiber surface was decreased but the size of pores existing among the nanofibers increased because of increasing the nanofiber diameter. The average thickness of the polymeric layer was 7nm. An investigation on the topography of nanofibers revealed that the average surface roughness values increased after the deposition of polymeric layer. The effect of operational parameters including adsorbent dosage, pH and initial metal ion concentration in adsorption process was investigated. The result showed that the maximum adsorption capacity occurs at the pH of 7.5. The isotherm and kinetic of adsorption process were evaluated using non-linear regression method. To determine the best fit model for each system, three error functions were used. The results showed that the experimental data followed with Langmuir isotherm. Although the intra-particle diffusion was influenced on adsorption rate, the adsorption kinetic conformed to the pseudo-second order kinetic model.

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Publication details

The article was received on 25 Aug 2017, accepted on 06 Dec 2017 and first published on 06 Dec 2017


Article type: Paper
DOI: 10.1039/C7NJ03200E
Citation: New J. Chem., 2017, Accepted Manuscript
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    Mesoporous MgO/PPG Hybrid Nanofibers: Synthesis, Optimization, Characterization and Heavy Metal Removal Property

    A. Almasian, L. maleknia, G. Chizarifard and F. Najafi, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ03200E

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