Bisphenol A sorption by organo-montmorillonite: Implications for the removal of organic contaminants from water

Park, Yuri, Sun, Zhiming, Ayoko, Godwin A., & Frost, Ray L. (2014) Bisphenol A sorption by organo-montmorillonite: Implications for the removal of organic contaminants from water. Chemosphere, 107, pp. 249-256.

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Abstract

Remediation of bisphenol A (BPA) from aqueous solutions by adsorption using organoclays synthesized from montmorillonite (MMT) with different types of organic surfactant molecules was demonstrated. High adsorption capacities of the organoclays for the uptake of BPA were observed and these demonstrated their potential application as strong adsorbents for noxious organic water contaminants. The adsorption of BPA was significantly influenced by pH, with increased adsorption of BPA in acidic pH range. However, the organoclays intercalated with highly loaded surfactants and/or large surfactant molecules were less influenced by the pH of the environment and this was thought to be due to the shielding the negative charge from surfactant molecules and the development of more positive charge on the clay surface, which leads to the attraction of anionic BPA even at alkaline pH. The hydrophobic phase created by loaded surfactant molecules contributed to a partitioning phase, interacting with BPA molecules strongly through hydrophobic interaction. Pseudo-second order kinetic model and Langmuir isotherm provided the best fit for the adsorption of BPA onto the organoclays. In addition, the adsorption process was spontaneous and exothermic with lower temperature facilitating the adsorption of BPA onto the organoclays. The described process provides a potential pathway for the removal of BPA from contaminated waters.

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ID Code: 83744
Item Type: Journal Article
Refereed: Yes
Keywords: BPA, Organoclays, Thermodynamics, Mechanism, Application, Environement
DOI: 10.1016/j.chemosphere.2013.12.050
ISSN: 00456535
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 Elsevier
Copyright Statement: Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Deposited On: 26 Apr 2015 22:37
Last Modified: 02 Jul 2016 20:06

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