Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/489
Title: Kinetic and equilibrium profiles of adsorptive recovery of thorium(IV) from aqueous solutions using poly(methacrylic acid) grafted cellulose/bentonite superabsorbent composite
Authors: Anirudhan, T S
Suchithra, P S
Senan, P
Tharun, A R
Keywords: Solid-phase extraction
Th(IV)-imprinted polymers
Issue Date: 4-Apr-2012
Publisher: American Chemical Society
Citation: Industrial and Engineering Chemistry Research 51(13):4825-4836;04 Apr 2012
Abstract: The removal and recovery of thorium(IV) [Th(IV)] ions from aqueous solutions were investigated using poly(methacrylic acid)-grafted-cellulose/bentonite (PMAA-g-Cell/Bent) superabsorbent composite through batch adsorption experiments. Surface characterizations of the adsorbent were investigated. The adsorbent showed significant Th(IV) removal(>99.7%) at pH 5.0. The influence of coexisting ions on the adsorption of Th(IV) was studied. Mass transfer aspects of Th(IV)adsorption onto PMAA-g-Cell/Bent were evaluated. The Sips adsorption isotherm described the adsorption data very well, with a maximum adsorption capacity of 188.1 mg/g. Thermodynamic parameters such as standard enthalpy (ΔH°), standard entropy(ΔS°), standard free energy (ΔG°), activation energy (Ea), isosteric enthalpy (ΔHx), and entropy (ΔSx) were calculated. Tests with a seawater sample revealed the effectiveness of PMAA-g-Cell/Bent for adsorptive removal of Th(IV) from aqueous solutions. Desorption experiments showed that 0.1 M HNO3 can effectively desorb adsorbed thorium ions with a contact time of 3 h. A single stage batch reactor is designed for commercial applicability of the adsorbent
Appears in Collections:2012

Files in This Item:
File Description SizeFormat 
I & EC research 51(2012),pg 4825-4836.PDF
  Restricted Access
3.31 MBAdobe PDFView/Open Request a copy

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.