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Type: Artigo de periódico
Title: Preparation And Characterization Of A Composite Based On Polyaniline, Polypyrrole And Cigarette Filters: Adsorption Studies And Kinetics Of Phenylbutazone In Aqueous Media
Abstract: Understanding the adsorption mechanisms of drugs on the surfaces of solid materials is important for determining the fate of these compounds in aqueous samples during water or wastewater treatment. A composite based on polyaniline (PAni), polypyrrole (PPy) and cigarette filters (CFs), PAni-PPy-CFs, was prepared, characterized by FTIR, TGA and SEM and applied in the investigation of the adsorption of a non-steroidal anti-inflammatory, phenylbutazone (PBZ), from aqueous solution. A group of experiments were conducted, and four kinetic models and five isotherm models were used to describe the adsorption process. The experimental kinetic data fitted very well with the second-order kinetic model, indicating that PBZ adsorption involves chemical adsorption at different binding sites, which could control the reaction rate. The equilibrium adsorption data were best fitted with the dual-site Langmuir-Freundlich isotherm, with a maximum adsorption capacity of 100.22 mg g-1; this indicates the existence of two kinds of adsorption sites on the polymer composite surface. Finally, this composite may act as a excellent adsorbent for environmental and analytical processes, such as a stationary phase in separation processes. © 2016 The Royal Society of Chemistry.
Editor: Royal Society of Chemistry
Rights: aberto
Identifier DOI: 10.1039/c6ra14071h
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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