Caffeine removal from synthetic wastewater using magnetic fruit peel composites: Material characterization, isotherm and kinetic studies

This work investigated the adsorption capacity of banana and orange peels, magnetite and their corresponding magnetic composites in the removal of caffeine from synthetic wastewater. The characteristics of the adsorbents were studied using proximal analysis, Fourier transform infrared spectroscopy (...

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Autores principales:	Cristina E. Almeida-Naranjo, María Belén Aldás, Génesis Cabrera, Victor H. Guerrero
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Banana peel Orange peel Magnetite Adsorption Emerging contaminant Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/1083f8b7049f4992977663e7f14bc102
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spelling	oai:doaj.org-article:1083f8b7049f4992977663e7f14bc1022021-11-04T04:43:51ZCaffeine removal from synthetic wastewater using magnetic fruit peel composites: Material characterization, isotherm and kinetic studies2667-010010.1016/j.envc.2021.100343https://doaj.org/article/1083f8b7049f4992977663e7f14bc1022021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2667010021003164https://doaj.org/toc/2667-0100This work investigated the adsorption capacity of banana and orange peels, magnetite and their corresponding magnetic composites in the removal of caffeine from synthetic wastewater. The characteristics of the adsorbents were studied using proximal analysis, Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Brunauer, Emmett and Teller (BET) analysis and X-ray diffraction. Batch adsorption tests were conducted to determine the influence of the adsorbent dose (0.5 and 10.0 g/L), contact time (5 – 180 min) and initial caffeine concentration (10 – 50 mg/L) in the caffeine removal. The fittings of the experimental data to the pseudo first order, pseudo second order, Elovich, and diffusion kinetic models, as well as to the Langmuir, Freundlich and Sips isotherm models were also studied. The use of magnetic peels improved around 1.7 times the adsorption capacity of peels. The effective doses were 3.5 g/L of orange peel, 9.5 g/L of banana peel, 2.5 g/L of orange peel composite, 5.5 g/L of banana peel composite, and 5 g/L of magnetite, achieving caffeine removal efficiencies of 95.5 ± 0.3%, 90.5 ± 0.5%, 93.6 ± 0.2%, 89.2 ± 0.01% and 54.8 ± 0.8%, respectively. The adsorption using the peels, magnetite, and their magnetic composites better fitted the pseudo first order kinetic model and the Langmuir and Sips isotherm models.Cristina E. Almeida-NaranjoMaría Belén AldásGénesis CabreraVictor H. GuerreroElsevierarticleBanana peelOrange peelMagnetiteAdsorptionEmerging contaminantEnvironmental sciencesGE1-350ENEnvironmental Challenges, Vol 5, Iss , Pp 100343- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Banana peel Orange peel Magnetite Adsorption Emerging contaminant Environmental sciences GE1-350
spellingShingle	Banana peel Orange peel Magnetite Adsorption Emerging contaminant Environmental sciences GE1-350 Cristina E. Almeida-Naranjo María Belén Aldás Génesis Cabrera Victor H. Guerrero Caffeine removal from synthetic wastewater using magnetic fruit peel composites: Material characterization, isotherm and kinetic studies
description	This work investigated the adsorption capacity of banana and orange peels, magnetite and their corresponding magnetic composites in the removal of caffeine from synthetic wastewater. The characteristics of the adsorbents were studied using proximal analysis, Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Brunauer, Emmett and Teller (BET) analysis and X-ray diffraction. Batch adsorption tests were conducted to determine the influence of the adsorbent dose (0.5 and 10.0 g/L), contact time (5 – 180 min) and initial caffeine concentration (10 – 50 mg/L) in the caffeine removal. The fittings of the experimental data to the pseudo first order, pseudo second order, Elovich, and diffusion kinetic models, as well as to the Langmuir, Freundlich and Sips isotherm models were also studied. The use of magnetic peels improved around 1.7 times the adsorption capacity of peels. The effective doses were 3.5 g/L of orange peel, 9.5 g/L of banana peel, 2.5 g/L of orange peel composite, 5.5 g/L of banana peel composite, and 5 g/L of magnetite, achieving caffeine removal efficiencies of 95.5 ± 0.3%, 90.5 ± 0.5%, 93.6 ± 0.2%, 89.2 ± 0.01% and 54.8 ± 0.8%, respectively. The adsorption using the peels, magnetite, and their magnetic composites better fitted the pseudo first order kinetic model and the Langmuir and Sips isotherm models.
format	article
author	Cristina E. Almeida-Naranjo María Belén Aldás Génesis Cabrera Victor H. Guerrero
author_facet	Cristina E. Almeida-Naranjo María Belén Aldás Génesis Cabrera Victor H. Guerrero
author_sort	Cristina E. Almeida-Naranjo
title	Caffeine removal from synthetic wastewater using magnetic fruit peel composites: Material characterization, isotherm and kinetic studies
title_short	Caffeine removal from synthetic wastewater using magnetic fruit peel composites: Material characterization, isotherm and kinetic studies
title_full	Caffeine removal from synthetic wastewater using magnetic fruit peel composites: Material characterization, isotherm and kinetic studies
title_fullStr	Caffeine removal from synthetic wastewater using magnetic fruit peel composites: Material characterization, isotherm and kinetic studies
title_full_unstemmed	Caffeine removal from synthetic wastewater using magnetic fruit peel composites: Material characterization, isotherm and kinetic studies
title_sort	caffeine removal from synthetic wastewater using magnetic fruit peel composites: material characterization, isotherm and kinetic studies
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/1083f8b7049f4992977663e7f14bc102
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_version_	1718445192537702400

Caffeine removal from synthetic wastewater using magnetic fruit peel composites: Material characterization, isotherm and kinetic studies

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