Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 330, Issue 1, Pages 55-61Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2008.07.050
Keywords
Hypercrosslinked polymeric adsorbent; Adsorption; Rhodamine B (RB); Methyl orange (MO); Hydrogen bonding
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Funding
- China Postdoctoral Science Foundation [20070410309]
- Central South University Science Development Foundation
- Science Foundation of Central South University [76112156]
- Postdoctoral Science Foundation of Central South University [748160000]
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In the present study, a hypercrosslinked polymeric adsorbent functionalized with formaldehyde carbonyl groups, HJ-1 was prepared and its adsorption behaviors for two dyes. Rhodamine B (RB) and methyl orange (MO), were tested in aqueous solution. Batch adsorption results indicated that semi-empirical Freundlich isotherm described the adsorption isotherms better and kinetic studies demonstrated that the adsorption obeyed the pseudo-second-order rate model and both of film diffusion and intra-particle diffusion were the rate limiting steps. Adsorption thermodynamic parameters displayed that the adsorption was an exothermic, spontaneous, and more ordered arrangement process, and the polar functional groups of the adsorbent and the matching between the pore diameter of the adsorbent and the molecular size of the adsorbate are the two primary factors influencing the adsorption. (C) 2008 Elsevier B.V. All rights reserved.
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