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      Remoción de colorantes azoicos rojo allura (rojo 40) mediante el uso de perlas de quitosano magnetizadas en medio acuoso Translated title: Removal of Azo Dyes Allura Red (Red 40) by Using Magnetic Chitosan Beads in Aqueous Medium

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          Abstract

          En este estudio se evaluó el uso de perlas de quitosano magnetizadas en la remoción de colorantes azoicos de la industria textil y alimentarias (Rojo Allura) tomando en cuenta factores como el pH, concentración del colorante y cantidad de perlas magnetizadas. Para la obtención de las perlas se utilizó quitosano al 2 %, glutaraldehido y magnetita (previamente sintetizada mediante un proceso de hidrólisis oxidativa), posteriormente se caracterizaron las perlas y la magnetita mediante espectroscopía infrarroja y microscopía electrónica de barrido

          Translated abstract

          In this study it was evaluated the use of magnetic chitosan beads in removal of textile and food azo dyes (Allura Red) taking into account some factors such as pH, the concentration of the dye and the mass of beads. To obtain the beads it was used chitosan 2 %, glutaraldehyde and magnetite (previously synthetized by hydrolysis oxidative), after that the beads and magnetite were characterized by infrared spectroscopy and scanning electron microscopy

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          Most cited references13

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          Decolourization of Industrial Effluents – Available Methods and Emerging Technologies – A Review

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            Fast and highly efficient removal of dyes under alkaline conditions using magnetic chitosan-Fe(III) hydrogel.

            The dyeing effluent of high alkalinity, which could not be treated efficiently by traditional wastewater technologies, highlighted the need to explore a technically feasible, highly efficient and cost effective method. Thus, a fast and highly efficient method for the removal of dyes under alkaline conditions using magnetic chitosan-Fe(III) hydrogel was proposed. Firstly, chitosan-Fe(III) hydrogel was prepared by a chelation procedure with cheap and environmentally friendly chitosan and iron salts. We characterized the sorption and desorption of C. I. Acid Red 73, a common type of anionic dye, on magnetic chitosan-Fe(III) hydrogel, to understand its availability for alkaline dyeing wastewater. Sorption of dye to chitosan-Fe(III) hydrogel was fast (adsorption could reach equilibrium in less than 10 min) in a wide pH range, and agreed well to the Langmuir-Freundlich adsorption model with a high maximum adsorption capacity of 294.5 mg/g under pH = 12. Meanwhile, 1 mol/L NaOH was used to desorb the dye efficiently (desorption efficiency 94.4%) and 0.1 mol/L HCl was applied to regenerate the chitosan-Fe(III) hydrogel. The results showed that the chitosan-Fe(III) hydrogel could retain its high efficiency after the desorption and regeneration. The common coexisting ions almost had no negative effect on the dye adsorption of chitosan-Fe(III) and the removals of a variety of anionic dyes suggest that the magnetic chitosan-Fe(III) hydrogel could efficiently adsorb both the acid and reactive dyes under alkaline condition. Overall, the results reported herein indicated that magnetic chtisoan-Fe(III) with high adsorption efficiency and strong magnetic property is very attractive and implies a potential of practical application for alkaline dyeing effluent treatment.
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              Magnetic chitosan microspheres: preparation and characterization

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                rsqp
                Revista de la Sociedad Química del Perú
                Rev. Soc. Quím. Perú
                Sociedad Química del Perú (Lima, , Peru )
                1810-634X
                January 2018
                : 84
                : 1
                : 18-26
                Affiliations
                [1] Lima orgnameUniversidad Nacional de Ingeniería orgdiv1Facultad de Ciencias orgdiv2Escuela de Química Perú ilyuni2002@ 123456yahoo.com
                Article
                S1810-634X2018000100003
                a634f076-123f-43df-b563-2f651d660610

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 30 December 2016
                : 13 February 2018
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 13, Pages: 9
                Product

                SciELO Peru

                Categories
                Trabajos originales

                removal,dyes,chitosan,magnetite,remoción,colorantes,quitosano,magnetita

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