Adsorption kinetics, isotherms, and thermodynamic studies for Hg2+ adsorption from aqueous medium using alizarin red-S-loaded amberlite IRA-400 resin. Issue 39 (20th August 2016)

• Record Type: Journal Article
• Authors: Naushad, Mu.; Vasudevan, S.; Sharma, G.; Kumar, A.; ALOthman, Z.A.
• Is Part Of: Desalination and water treatment. Volume 57:Issue 39(2016)
• Page Start: 18551
• Page End: 18559
• Publication Date: 2016-08-20
• Subjects: Amberlite IRA-400 -- Alizarin red-S -- Toxic metals -- Hg2+ -- Adsorption -- Kinetics -- Real sample; Saline water conversion -- Periodicals; Saline water conversion; Water -- Purification; Periodicals; 628.167
• DOI: 10.1080/19443994.2015.1090914
• Languages: English
• ISSNs: 1944-3994

Abstract

Abstract: Alizarin red-S-modified amberlite IRA-400 resin (ARSA) was applied for Hg 2+ removal from the aqueous medium which is a highly toxic metal ion. The adsorption process which was pH dependent, showed maximum adsorption of Hg 2+ in the pH range 6–8. ARSA exhibited good monolayer adsorption capacity for Hg 2+ (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 Hg 2+ metal ion from a real water sample. The values of Δ H and Δ S were found to be 79.87 kJ mol − 1 and 0.26 J mol − 1 K − 1, respectively.