Adsorption of p-nitrophenol on organoclays

Park, Yuri, Frost, Ray L., Ayoko, Godwin A., & Morgan, Dana L. (2013) Adsorption of p-nitrophenol on organoclays. Journal of Thermal Analysis and Calorimetry, 111(1), pp. 41-47.

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In this study, organoclays were prepared through ion exchange of a single cationic surfactant, hexadecyltrimethylammonium bromide and characterised by a range of methods including X-ray diffraction (XRD) and thermogravimetric analysis. Changes in the surface properties of montmorillonite and the organoclays were observed and the basal spacings of organoclays with and without p-nitrophenol were determined using XRD. The thermal stability of both organoclays were measured using thermogravimetry. As the surfactant loading increased, the expanded basal spacings were observed, and different molecular configurations of surfactant were identified. When the surfactant loading exceeded 1.0 CEC, surfactant molecules tend to adsorb strongly on the clay surface and this resulted in increased affinity to organic compounds. The adsorbed p-nitrophenol and the surfactant decomposed simultaneously. Hence, the surfactant molecules and adsorbed p-nitrophenol are important in determining the thermal stabilities of organoclays. This study enhances the understanding of the structure and adsorption properties of organoclays and has further implications for the application of organoclays as filter materials for the removal of organic pollutants in aqueous solutions.

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ID Code: 58778
Item Type: Journal Article
Refereed: Yes
Keywords: Organoclays, Surfactant, XRD, p-nitrophenol, Adsorption, TG
DOI: 10.1007/s10973-011-2103-7
ISSN: 1572-8943
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 Akade´miai Kiado´, Budapest, Hungary
Deposited On: 10 Apr 2013 04:06
Last Modified: 10 Apr 2013 04:17

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