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Saeed MM, Ahmed M, Ghaffar A. Adsorption Behaviour of Hg(II) from Acetate Medium onto PAR-Imbedded Polyurethane Foam. ADSORPT SCI TECHNOL 2016. [DOI: 10.1260/02636170360699822] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
The sorption behaviour of a 2.46 • 10−5M solution of Hg(II) on 4-(2-pyridylazo)resorcinol (PAR)-loaded polyurethane foam (PUF) was investigated. Optimum sorption was observed from acetate medium at pH 6 with the maximum equilibration time being 30 min. The kinetic data indicated an intraparticle diffusion process with sorption being first order. The rate constant k was 0.053 min−1. The classical Freundlich and Langmuir adsorption isotherms were tested. The Freundlich constants 1/n and Kfwere determined as 0.40 and 1.07 • 10−3mol/g, respectively, and the Langmuir constants ‘M’ and ‘b’ were 3.84 • 10−5mol/g and 3.5 • 104dm3/mol, respectively. A sorption free energy (E) of 12.9 kJ/mol indicated chemisorption. The numerical values of the thermodynamic parameters ΔH, ΔS and ΔG indicated that sorption was spontaneous and exothermic in nature. The Scatchard equation was tested as a means of evaluating the binding sites of PUF with Hg(II). The stability constants for sorption were determined and the sorption mechanism was discussed.
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Affiliation(s)
- Muhammad Mufazzal Saeed
- Nuclear Chemistry Division, Pakistan Institute of Nuclear Science and Technology (PINSTECH), P.O. Nilore, Islamabad, Pakistan
| | - Munir Ahmed
- Nuclear Chemistry Division, Pakistan Institute of Nuclear Science and Technology (PINSTECH), P.O. Nilore, Islamabad, Pakistan
| | - Abdul Ghaffar
- Nuclear Chemistry Division, Pakistan Institute of Nuclear Science and Technology (PINSTECH), P.O. Nilore, Islamabad, Pakistan
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Konczyk J, Nowik-Zajac A, Kozlowski CA. Calixarene-based extractants for heavy metal ions removal from aqueous solutions. SEP SCI TECHNOL 2016. [DOI: 10.1080/01496395.2016.1209219] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Joanna Konczyk
- Faculty of Mathematics and Natural Sciences, Jan Dlugosz University of Czestochowa, Czestochowa, Poland
| | - Anna Nowik-Zajac
- Faculty of Mathematics and Natural Sciences, Jan Dlugosz University of Czestochowa, Czestochowa, Poland
| | - Cezary A. Kozlowski
- Faculty of Mathematics and Natural Sciences, Jan Dlugosz University of Czestochowa, Czestochowa, Poland
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A convenient synthesis of new thiaazacrown ethers and study of their complexation reactions with some transition metal cations in binary acetonitrile–chloroform mixture using the conductometric method. J INCL PHENOM MACRO 2008. [DOI: 10.1007/s10847-008-9440-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Thomas J, Surender GD, Reddy MLP. Preparation of Hematite Powders with Plate‐Like Morphology from Titania Wastes by Solvent Extraction Followed by Precipitation Stripping and Hydrothermal Synthesis. SEP SCI TECHNOL 2005. [DOI: 10.1081/ss-120030798] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Meera R, Reddy MLP. Para‐Substituted 1‐Phenyl‐3‐methyl‐4‐aroyl‐5‐pyrazolones as Chelating Agents for the Synergistic Extraction of Thorium(IV) and Uranium(VI) in the Presence of Various Crown Ethers. SOLVENT EXTRACTION AND ION EXCHANGE 2004. [DOI: 10.1081/sei-200030290] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Pavithran R, Luxmi Varma R, Reddy MLP. Synergistic Solvent Extraction of Trivalent Lanthanoids with Mixtures of 1‐Phenyl‐3‐methyl‐4‐pivaloyl‐5‐pyrazolone and Crown Ethers. SOLVENT EXTRACTION AND ION EXCHANGE 2003. [DOI: 10.1081/sei-120025924] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Saji J, Reddy MLP. Selective Extraction and Separation of Titanium(IV) from Multivalent Metal Chloride Solutions Using 2-Ethylhexyl Phosphonic Acid Mono-2-ethylhexyl Ester. SEP SCI TECHNOL 2003. [DOI: 10.1081/ss-120016583] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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