Enhancement of adsorption ability of calcium alginate gel beads towards Pd(II) ion. A kinetic and equilibrium study on hybrid Laponite and Montmorillonite-alginate gel beads

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Abstract

The adsorption ability of hybrid Montmorillonite and Laponite-calciumalginate gel beads towards Pd2+ ion was studied in the pH range 2-4, in pure water and in aqueous NaCl solution at I=0.01 mol L-1 and T=25 °C. The pseudo second order kinetic equation and the Langmuir and Freundlich isotherms were used to fit the kinetic and thermodynamic experimental data. A comparison of the results already published on the adsorption capacity of calcium alginate gel beads at the same experimental conditions was made. Enhancement of palladium(II) adsorption by alginate beads with the addition of the two clay minerals was obtained, with increments higher than 50% of Pd(II) ion recovered/removed. The physico-chemical characterization of gel beads was also made. SEMmicrographs, EDX and FT-IR spectra as well as the values of the physical parameters calculated for each adsorbent material were analysed in order to find correlations between their chemical and physical properties and their behaviour in terms of palladium adsorption.
Lingua originaleEnglish
pagine (da-a)162-170
Numero di pagine9
RivistaApplied Clay Science
Volume118
Stato di pubblicazionePublished - 2015

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Bentonite
alginate
montmorillonite
gel
Gels
calcium
Ions
adsorption
Adsorption
kinetics
Kinetics
ion
palladium
Palladium
Clay minerals
Adsorbents
Chemical properties
Isotherms
clay mineral
Energy dispersive spectroscopy

All Science Journal Classification (ASJC) codes

  • Geology
  • Geochemistry and Petrology

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title = "Enhancement of adsorption ability of calcium alginate gel beads towards Pd(II) ion. A kinetic and equilibrium study on hybrid Laponite and Montmorillonite-alginate gel beads",
abstract = "The adsorption ability of hybrid Montmorillonite and Laponite-calciumalginate gel beads towards Pd2+ ion was studied in the pH range 2-4, in pure water and in aqueous NaCl solution at I=0.01 mol L-1 and T=25 °C. The pseudo second order kinetic equation and the Langmuir and Freundlich isotherms were used to fit the kinetic and thermodynamic experimental data. A comparison of the results already published on the adsorption capacity of calcium alginate gel beads at the same experimental conditions was made. Enhancement of palladium(II) adsorption by alginate beads with the addition of the two clay minerals was obtained, with increments higher than 50{\%} of Pd(II) ion recovered/removed. The physico-chemical characterization of gel beads was also made. SEMmicrographs, EDX and FT-IR spectra as well as the values of the physical parameters calculated for each adsorbent material were analysed in order to find correlations between their chemical and physical properties and their behaviour in terms of palladium adsorption.",
author = "Alberto Pettignano and Nicola Muratore and Santino Orecchio and Salvatore Cataldo",
year = "2015",
language = "English",
volume = "118",
pages = "162--170",
journal = "Applied Clay Science",
issn = "0169-1317",
publisher = "Elsevier BV",

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TY - JOUR

T1 - Enhancement of adsorption ability of calcium alginate gel beads towards Pd(II) ion. A kinetic and equilibrium study on hybrid Laponite and Montmorillonite-alginate gel beads

AU - Pettignano, Alberto

AU - Muratore, Nicola

AU - Orecchio, Santino

AU - Cataldo, Salvatore

PY - 2015

Y1 - 2015

N2 - The adsorption ability of hybrid Montmorillonite and Laponite-calciumalginate gel beads towards Pd2+ ion was studied in the pH range 2-4, in pure water and in aqueous NaCl solution at I=0.01 mol L-1 and T=25 °C. The pseudo second order kinetic equation and the Langmuir and Freundlich isotherms were used to fit the kinetic and thermodynamic experimental data. A comparison of the results already published on the adsorption capacity of calcium alginate gel beads at the same experimental conditions was made. Enhancement of palladium(II) adsorption by alginate beads with the addition of the two clay minerals was obtained, with increments higher than 50% of Pd(II) ion recovered/removed. The physico-chemical characterization of gel beads was also made. SEMmicrographs, EDX and FT-IR spectra as well as the values of the physical parameters calculated for each adsorbent material were analysed in order to find correlations between their chemical and physical properties and their behaviour in terms of palladium adsorption.

AB - The adsorption ability of hybrid Montmorillonite and Laponite-calciumalginate gel beads towards Pd2+ ion was studied in the pH range 2-4, in pure water and in aqueous NaCl solution at I=0.01 mol L-1 and T=25 °C. The pseudo second order kinetic equation and the Langmuir and Freundlich isotherms were used to fit the kinetic and thermodynamic experimental data. A comparison of the results already published on the adsorption capacity of calcium alginate gel beads at the same experimental conditions was made. Enhancement of palladium(II) adsorption by alginate beads with the addition of the two clay minerals was obtained, with increments higher than 50% of Pd(II) ion recovered/removed. The physico-chemical characterization of gel beads was also made. SEMmicrographs, EDX and FT-IR spectra as well as the values of the physical parameters calculated for each adsorbent material were analysed in order to find correlations between their chemical and physical properties and their behaviour in terms of palladium adsorption.

UR - http://hdl.handle.net/10447/149313

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M3 - Article

VL - 118

SP - 162

EP - 170

JO - Applied Clay Science

JF - Applied Clay Science

SN - 0169-1317

ER -