Strengthening adsorptive amelioration: Isotherm modeling in liquid phase surface complexation of Pb (II) and Cd (II) ions

Amarendra Dhar Dwivedi; Shashi Prabha Dubey; Krishna Gopal; Mika Sillanpää

doi:10.1016/j.desal.2010.09.002

Strengthening adsorptive amelioration: Isotherm modeling in liquid phase surface complexation of Pb (II) and Cd (II) ions

Amarendra Dhar Dwivedi, Shashi Prabha Dubey, Krishna Gopal, Mika Sillanpää

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

34 Citations (Scopus)

Abstract

The mitigation of recalcitrant heavy metals in an economic fashion is still a headline issue even though various methodologies and techniques have been explored. In this present study, inexpensive and abundant Eucalyptus (Eucalyptus globulus) bark has been utilized for adsorbent development; AdsEbc for mitigation of Pb (II) and Cd (II) ions from aqueous phase successfully. AdsEbc showed promising adsorption capacity of 26.12 and 35.65mgg^-1 for Pb (II) and Cd (II) ions at pH 5 and 8, respectively, calculated by best fitted isotherm modeling. Thermodynamics results revealed the feasibility and endothermic nature of adsorption process. Langmuir, Freundlich, Langmuir-Freundlich (Sips), Redlich-Peterson (R-P) and Dubinin-Radushkevich (D-R) models were used for the mathematical description of the relationship between adsorbed and aqueous concentration of adsorbate on adsorbent surfaces at equilibrium. Spectroscopic examinations of adsorbent were carried out with scanning electron microscopy and Fourier transform infrared spectroscopy.

Original language	English
Pages (from-to)	25-33
Number of pages	9
Journal	Desalination
Volume	267
Issue number	1
DOIs	https://doi.org/10.1016/j.desal.2010.09.002
Publication status	Published - 1 Feb 2011
Externally published	Yes

Keywords

Characterizations
Elovich
Pseudo second-order
Redlich-Peterson
Sips

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science
Water Science and Technology
Mechanical Engineering

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title = "Strengthening adsorptive amelioration: Isotherm modeling in liquid phase surface complexation of Pb (II) and Cd (II) ions",

abstract = "The mitigation of recalcitrant heavy metals in an economic fashion is still a headline issue even though various methodologies and techniques have been explored. In this present study, inexpensive and abundant Eucalyptus (Eucalyptus globulus) bark has been utilized for adsorbent development; AdsEbc for mitigation of Pb (II) and Cd (II) ions from aqueous phase successfully. AdsEbc showed promising adsorption capacity of 26.12 and 35.65mgg-1 for Pb (II) and Cd (II) ions at pH 5 and 8, respectively, calculated by best fitted isotherm modeling. Thermodynamics results revealed the feasibility and endothermic nature of adsorption process. Langmuir, Freundlich, Langmuir-Freundlich (Sips), Redlich-Peterson (R-P) and Dubinin-Radushkevich (D-R) models were used for the mathematical description of the relationship between adsorbed and aqueous concentration of adsorbate on adsorbent surfaces at equilibrium. Spectroscopic examinations of adsorbent were carried out with scanning electron microscopy and Fourier transform infrared spectroscopy.",

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AU - Gopal, Krishna

AU - Sillanpää, Mika

PY - 2011/2/1

Y1 - 2011/2/1

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AB - The mitigation of recalcitrant heavy metals in an economic fashion is still a headline issue even though various methodologies and techniques have been explored. In this present study, inexpensive and abundant Eucalyptus (Eucalyptus globulus) bark has been utilized for adsorbent development; AdsEbc for mitigation of Pb (II) and Cd (II) ions from aqueous phase successfully. AdsEbc showed promising adsorption capacity of 26.12 and 35.65mgg-1 for Pb (II) and Cd (II) ions at pH 5 and 8, respectively, calculated by best fitted isotherm modeling. Thermodynamics results revealed the feasibility and endothermic nature of adsorption process. Langmuir, Freundlich, Langmuir-Freundlich (Sips), Redlich-Peterson (R-P) and Dubinin-Radushkevich (D-R) models were used for the mathematical description of the relationship between adsorbed and aqueous concentration of adsorbate on adsorbent surfaces at equilibrium. Spectroscopic examinations of adsorbent were carried out with scanning electron microscopy and Fourier transform infrared spectroscopy.

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Strengthening adsorptive amelioration: Isotherm modeling in liquid phase surface complexation of Pb (II) and Cd (II) ions

Abstract

Keywords

ASJC Scopus subject areas

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