Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: analysis of kinetics, equilibrium and adsorption mechanisms

Chitosan particles (CP) prepared by coacervation technique were used as bio-sorbent material to remove the azo RR-195 dye; removal percentage (%RM) and adsorption capacity (Q) in batch adsorption experiments under different conditions of bio-sorbent doses, agitation speed and pH medium were determin...

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Autores principales:	Pérez Calderón, John Freddy, Santos, María Victoria, Zaritzky, Noemí Elisabet
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2018
Materias:	Química Adsorption Azo dye removal Chitosan coacervated particles Reactive red Thermodynamic analysis
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/97722 https://ri.conicet.gov.ar/11336/86550
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-97722
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Química Adsorption Azo dye removal Chitosan coacervated particles Reactive red Thermodynamic analysis
spellingShingle	Química Adsorption Azo dye removal Chitosan coacervated particles Reactive red Thermodynamic analysis Pérez Calderón, John Freddy Santos, María Victoria Zaritzky, Noemí Elisabet Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: analysis of kinetics, equilibrium and adsorption mechanisms
topic_facet	Química Adsorption Azo dye removal Chitosan coacervated particles Reactive red Thermodynamic analysis
description	Chitosan particles (CP) prepared by coacervation technique were used as bio-sorbent material to remove the azo RR-195 dye; removal percentage (%RM) and adsorption capacity (Q) in batch adsorption experiments under different conditions of bio-sorbent doses, agitation speed and pH medium were determined; the maximum pH of dye removal was 4. Different adsorption equilibrium isotherms were tested and Redlich-Peterson was the model that best fitted experimental results. From the adsorption thermodynamic parameters, it was concluded that the adsorption process of RR-195 onto CP is spontaneous, favorable (ΔG<0), endothermic (ΔH>0) and the dye molecules show affinity for the bio-sorbent (ΔS>0). The maximum monolayer adsorption capacity (Qm) of CP was 82.1 mg.g-1 at pH = 4 and 318 K; therefore coacervated chitosan particles are among the top three adsorbent agents for this dye. The %RM was 84.2% in 10 h when the initial concentration of the dye was 300 mg.L-1. The mixed surface reaction and diffusion-controlled kinetic model (MSR-DCK), fitted satisfactorily experimental results, by considering simultaneous mechanisms of diffusion and adsorption process in the active sites. Fourier transform infrared spectroscopy (FTIR) with attenuated total reflection (ATR), scanning electron microscope-energy dispersion spectrometry X-ray (SEM-EDS) and Zeta potential analysis revealed that the interaction between dye molecules and the bio-sorbent are of an electrostatic nature. Desorption/regeneration experiments indicated that CP can be used in adsorptions/desorption cycles for the removal of wastewater containing RR-195. The information presented in this work demonstrates that CP can be a potent eco-friendly bio-adsorbent for the remediation of industrial wastewater.
format	Articulo Articulo
author	Pérez Calderón, John Freddy Santos, María Victoria Zaritzky, Noemí Elisabet
author_facet	Pérez Calderón, John Freddy Santos, María Victoria Zaritzky, Noemí Elisabet
author_sort	Pérez Calderón, John Freddy
title	Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: analysis of kinetics, equilibrium and adsorption mechanisms
title_short	Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: analysis of kinetics, equilibrium and adsorption mechanisms
title_full	Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: analysis of kinetics, equilibrium and adsorption mechanisms
title_fullStr	Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: analysis of kinetics, equilibrium and adsorption mechanisms
title_full_unstemmed	Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: analysis of kinetics, equilibrium and adsorption mechanisms
title_sort	reactive red 195 dye removal using chitosan coacervated particles as bio-sorbent: analysis of kinetics, equilibrium and adsorption mechanisms
publishDate	2018
url	http://sedici.unlp.edu.ar/handle/10915/97722 https://ri.conicet.gov.ar/11336/86550
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bdutipo_str	Repositorios
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Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: analysis of kinetics, equilibrium and adsorption mechanisms

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