Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/243878
Type: Artigo de periódico
Title: Synthesis And Evaluation Of Different Adsorbents Based On Poly(methacrylic Acid-trimethylolpropane Trimethacrylate) And Poly(vinylimidazole-trimethylolpropane Trimethacrylate) For The Adsorption Of Tebuthiuron From Aqueous Medium
Author: da Fonseca
Raquel Justo; Segatelli
Mariana Gaya; Borges
Keyller Bastos; Teixeira Tarley
Cesar Ricardo
Abstract: In the present study a new cross-linked copolymer poly(methacrylic acid-trimethylolpropane trimethacrylate) (named PMA) and poly(vinylimidazole-trimethylolpropane trimethacrylate) (named PVI) was synthesized through precipitation polymerization and applied to the adsorption of tebuthiuron. Adsorbent materials were characterized by using FT-IR, SEM, TGA, textural data, and elemental analysis. Kinetic study showed that the tebuthiuron adsorption was very quick and the equilibrium time was achieved at 20 min for both polymers. Experimental kinetic data for both polymers were very well described by the second-order kinetic model, thus indicating that tebuthiuron adsorption involves chemical adsorption in different binding sites, which could control the reaction rate. Adsorption equilibrium data were better fitted to the dual-site Langmuir-Freundlich model, which recognizes the existence of two kinds of adsorption sites on the polymer surface ascribed to the presence of carboxyl and carbonyl groups from PMA and imidazole ring and carbonyl group from PVI. The maximum adsorption capacities of PMA and PVI were found to be 186.76 and 213.89 mg g(-1), respectively, which are much higher than other adsorbents. (C) 2015 Elsevier B.V. All rights reserved.
Subject: Solid-phase Extraction
Liquid-chromatographic Analysis
Online Preconcentration
Phenylurea Herbicides
Sorption
Ions
Methacrylate
Kinetics
Polyvinylimidazole
Montmorillonite
Country: AMSTERDAM
Editor: ELSEVIER SCIENCE BV
Citation: Synthesis And Evaluation Of Different Adsorbents Based On Poly(methacrylic Acid-trimethylolpropane Trimethacrylate) And Poly(vinylimidazole-trimethylolpropane Trimethacrylate) For The Adsorption Of Tebuthiuron From Aqueous Medium. Elsevier Science Bv, v. 93, p. 1-9 AUG-2015.
Rights: embargo
Identifier DOI: 10.1016/j.reactfunctpolym.2015.05.004
Address: http://www.sciencedirect.com/science/article/pii/S1381514815000693
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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