Adsorption modeling of antimony(V) on diphenylthiocarbazone loaded polyurethane foam

M. M. Saeed; M. Ahmed; A. Ghaffar

doi:10.1023/A:1023364428987

Adsorption modeling of antimony(V) on diphenylthiocarbazone loaded polyurethane foam

M. M. Saeed^*, M. Ahmed, A. Ghaffar

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The uptake behavior of Sb(V) onto diphenylthiocarbazone (H2DZ) loaded polyurethane foam (PUF) from aqueous solutions of different acids in the presence of KI have been studied. The maximum adsorption was found from 0.5N HNO₃ containing 0.2M KI. The maximum equilibrium was achieved within twenty minutes shaking time. The sorption behavior followed the Freundlich and Langmuir adsorption isotherms. The Freundlich constants 1/n and K_f are 0.57 and 3.26·10^-2 mol·g^-1, respectively. The Langmuir constants M and b are 2.18·10^-4 mol·g^-1 and 2.4·10⁴ 1·g^-1, respectively. The value of sorption free energy (E) evaluated from D-R isotherm is 10.8 kJ·mol^-1 indicating the ion exchange type chemisorption of Sb(V) on H2DZ loaded PUF. The thermodynamic parameters of enthalpy (ΔH), entropy (ΔS) and Gibbs free energy (ΔG) have also been investigated and found to be -51.8 kJ·mol^-1, -127.3 J·mol^-1·deg^-1 and -13.8 kJ·mol^-1, respectively. The negative values of (ΔH) and (ΔG) indicate that the sorption is exothermic and spontaneous in nature. The effect of anions and cations and sorption mechanism are discussed.

Original language	English
Pages (from-to)	121-126
Number of pages	6
Journal	Journal of Radioanalytical and Nuclear Chemistry
Volume	256
Issue number	1
DOIs	https://doi.org/10.1023/A:1023364428987
State	Published - 1 Apr 2003
Externally published	Yes

ASJC Scopus subject areas

Analytical Chemistry
Nuclear Energy and Engineering
Radiology Nuclear Medicine and imaging
Pollution
Spectroscopy
Public Health, Environmental and Occupational Health
Health, Toxicology and Mutagenesis

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title = "Adsorption modeling of antimony(V) on diphenylthiocarbazone loaded polyurethane foam",

abstract = "The uptake behavior of Sb(V) onto diphenylthiocarbazone (H2DZ) loaded polyurethane foam (PUF) from aqueous solutions of different acids in the presence of KI have been studied. The maximum adsorption was found from 0.5N HNO3 containing 0.2M KI. The maximum equilibrium was achieved within twenty minutes shaking time. The sorption behavior followed the Freundlich and Langmuir adsorption isotherms. The Freundlich constants 1/n and Kf are 0.57 and 3.26·10-2 mol·g-1, respectively. The Langmuir constants M and b are 2.18·10-4 mol·g-1 and 2.4·104 1·g-1, respectively. The value of sorption free energy (E) evaluated from D-R isotherm is 10.8 kJ·mol-1 indicating the ion exchange type chemisorption of Sb(V) on H2DZ loaded PUF. The thermodynamic parameters of enthalpy (ΔH), entropy (ΔS) and Gibbs free energy (ΔG) have also been investigated and found to be -51.8 kJ·mol-1, -127.3 J·mol-1·deg-1 and -13.8 kJ·mol-1, respectively. The negative values of (ΔH) and (ΔG) indicate that the sorption is exothermic and spontaneous in nature. The effect of anions and cations and sorption mechanism are discussed.",

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AU - Saeed, M. M.

AU - Ahmed, M.

AU - Ghaffar, A.

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Y1 - 2003/4/1

N2 - The uptake behavior of Sb(V) onto diphenylthiocarbazone (H2DZ) loaded polyurethane foam (PUF) from aqueous solutions of different acids in the presence of KI have been studied. The maximum adsorption was found from 0.5N HNO3 containing 0.2M KI. The maximum equilibrium was achieved within twenty minutes shaking time. The sorption behavior followed the Freundlich and Langmuir adsorption isotherms. The Freundlich constants 1/n and Kf are 0.57 and 3.26·10-2 mol·g-1, respectively. The Langmuir constants M and b are 2.18·10-4 mol·g-1 and 2.4·104 1·g-1, respectively. The value of sorption free energy (E) evaluated from D-R isotherm is 10.8 kJ·mol-1 indicating the ion exchange type chemisorption of Sb(V) on H2DZ loaded PUF. The thermodynamic parameters of enthalpy (ΔH), entropy (ΔS) and Gibbs free energy (ΔG) have also been investigated and found to be -51.8 kJ·mol-1, -127.3 J·mol-1·deg-1 and -13.8 kJ·mol-1, respectively. The negative values of (ΔH) and (ΔG) indicate that the sorption is exothermic and spontaneous in nature. The effect of anions and cations and sorption mechanism are discussed.

AB - The uptake behavior of Sb(V) onto diphenylthiocarbazone (H2DZ) loaded polyurethane foam (PUF) from aqueous solutions of different acids in the presence of KI have been studied. The maximum adsorption was found from 0.5N HNO3 containing 0.2M KI. The maximum equilibrium was achieved within twenty minutes shaking time. The sorption behavior followed the Freundlich and Langmuir adsorption isotherms. The Freundlich constants 1/n and Kf are 0.57 and 3.26·10-2 mol·g-1, respectively. The Langmuir constants M and b are 2.18·10-4 mol·g-1 and 2.4·104 1·g-1, respectively. The value of sorption free energy (E) evaluated from D-R isotherm is 10.8 kJ·mol-1 indicating the ion exchange type chemisorption of Sb(V) on H2DZ loaded PUF. The thermodynamic parameters of enthalpy (ΔH), entropy (ΔS) and Gibbs free energy (ΔG) have also been investigated and found to be -51.8 kJ·mol-1, -127.3 J·mol-1·deg-1 and -13.8 kJ·mol-1, respectively. The negative values of (ΔH) and (ΔG) indicate that the sorption is exothermic and spontaneous in nature. The effect of anions and cations and sorption mechanism are discussed.

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Adsorption modeling of antimony(V) on diphenylthiocarbazone loaded polyurethane foam

Abstract

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