Adsorption kinetics, isotherms, and thermodynamic studies for Hg2+ adsorption from aqueous medium using alizarin red-S-loaded amberlite IRA-400 resin

Alizarin red-S-modified amberlite IRA-400 resin (ARSA) was applied for Hg2+ removal from the aqueous medium which is a highly toxic metal ion. The adsorption process which was pH dependent, showed maximum adsorption of Hg2+ in the pH range 6–8. ARSA exhibited good monolayer adsorption capacity for H...

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Bibliographic Details
Published in:Desalination and water treatment 2016-08, Vol.57 (39), p.18551-18559
Main Authors: Naushad, Mu, Vasudevan, S., Sharma, G., Kumar, A., ALOthman, Z.A.
Format: Article
Language:English
Subjects:
Adsorption
Alizarin red-S
Amberlite IRA-400
Hg2
Isotherms
Kinetics
Metal ions
Real sample
Toxic metals
Water analysis
Water sampling
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Summary:Alizarin red-S-modified amberlite IRA-400 resin (ARSA) was applied for Hg2+ removal from the aqueous medium which is a highly toxic metal ion. The adsorption process which was pH dependent, showed maximum adsorption of Hg2+ in the pH range 6–8. ARSA exhibited good monolayer adsorption capacity for Hg2+ (303.03 mg g−1) at 25°C and the isotherm was well fitted by the Langmuir model. Moreover, the adsorption was evaluated thermodynamically and the negative values of Gibbs free energy revealed the spontaneity of adsorption process. The practical applicability of ARSA was explored for the adsorption of Hg2+ metal ion from a real water sample. The values of ΔH and ΔS were found to be 79.87 kJ mol−1 and 0.26 J mol−1 K−1, respectively.
ISSN:1944-3986
1944-3994
1944-3986
DOI:10.1080/19443994.2015.1090914