Removal of diclofenac from aqueous solutions by adsorption on thermo-plasma expanded graphite

Abstract The adsorption of diclofenac on thermo-plasma expanded graphite (a commercial product) from water solutions was investigated. The adsorbent material was characterized by SEM, TEM, BET, Raman and X-ray diffraction analyses. Typical diffractogram and Raman spectrum of graphitic material, dime...

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Autores principales:	Marco Cuccarese, Sergio Brutti, Angela De Bonis, Roberto Teghil, Ignazio Marcello Mancini, Salvatore Masi, Donatella Caniani
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/25d4b2b929b24621a90030405c1842d0
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spelling	oai:doaj.org-article:25d4b2b929b24621a90030405c1842d02021-12-02T14:11:31ZRemoval of diclofenac from aqueous solutions by adsorption on thermo-plasma expanded graphite10.1038/s41598-021-83117-z2045-2322https://doaj.org/article/25d4b2b929b24621a90030405c1842d02021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83117-zhttps://doaj.org/toc/2045-2322Abstract The adsorption of diclofenac on thermo-plasma expanded graphite (a commercial product) from water solutions was investigated. The adsorbent material was characterized by SEM, TEM, BET, Raman and X-ray diffraction analyses. Typical diffractogram and Raman spectrum of graphitic material, dimension of 24.02 nm as crystallite dimension and a surface area of 47 m2 g−1 were obtained. The effect of pH on the adsorption capacity was evaluated in the range 1–7 and the adsorption mechanism was described by kinetic and isothermal studies. Pseudo-second order and Dubinin–Radushkevich models agreed with theoretical values of adsorption capacity (i.e. 400 and 433 mg g−1, respectively) and resulted to be the best fit for kinetics and isothermal experimental data. The thermodynamics of the process was evaluated by plotting the adsorption capacity/concentration ratio at the equilibrium as a function of different values of the multiplicative inverse of temperature. Moreover, the adsorbent regeneration was also investigated, comparing two different remediation techniques. Solvent washing performed with NaOH 0.2 M and thermo-treatment carried out by heating in an oven at 105 °C for 2 h and then at 200 °C for 4 h. The thermo-treatment was the best technique to regenerate the adsorbent, ensuring same performance after 4 cycles of use and regeneration.Marco CuccareseSergio BruttiAngela De BonisRoberto TeghilIgnazio Marcello ManciniSalvatore MasiDonatella CanianiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Marco Cuccarese Sergio Brutti Angela De Bonis Roberto Teghil Ignazio Marcello Mancini Salvatore Masi Donatella Caniani Removal of diclofenac from aqueous solutions by adsorption on thermo-plasma expanded graphite
description	Abstract The adsorption of diclofenac on thermo-plasma expanded graphite (a commercial product) from water solutions was investigated. The adsorbent material was characterized by SEM, TEM, BET, Raman and X-ray diffraction analyses. Typical diffractogram and Raman spectrum of graphitic material, dimension of 24.02 nm as crystallite dimension and a surface area of 47 m2 g−1 were obtained. The effect of pH on the adsorption capacity was evaluated in the range 1–7 and the adsorption mechanism was described by kinetic and isothermal studies. Pseudo-second order and Dubinin–Radushkevich models agreed with theoretical values of adsorption capacity (i.e. 400 and 433 mg g−1, respectively) and resulted to be the best fit for kinetics and isothermal experimental data. The thermodynamics of the process was evaluated by plotting the adsorption capacity/concentration ratio at the equilibrium as a function of different values of the multiplicative inverse of temperature. Moreover, the adsorbent regeneration was also investigated, comparing two different remediation techniques. Solvent washing performed with NaOH 0.2 M and thermo-treatment carried out by heating in an oven at 105 °C for 2 h and then at 200 °C for 4 h. The thermo-treatment was the best technique to regenerate the adsorbent, ensuring same performance after 4 cycles of use and regeneration.
format	article
author	Marco Cuccarese Sergio Brutti Angela De Bonis Roberto Teghil Ignazio Marcello Mancini Salvatore Masi Donatella Caniani
author_facet	Marco Cuccarese Sergio Brutti Angela De Bonis Roberto Teghil Ignazio Marcello Mancini Salvatore Masi Donatella Caniani
author_sort	Marco Cuccarese
title	Removal of diclofenac from aqueous solutions by adsorption on thermo-plasma expanded graphite
title_short	Removal of diclofenac from aqueous solutions by adsorption on thermo-plasma expanded graphite
title_full	Removal of diclofenac from aqueous solutions by adsorption on thermo-plasma expanded graphite
title_fullStr	Removal of diclofenac from aqueous solutions by adsorption on thermo-plasma expanded graphite
title_full_unstemmed	Removal of diclofenac from aqueous solutions by adsorption on thermo-plasma expanded graphite
title_sort	removal of diclofenac from aqueous solutions by adsorption on thermo-plasma expanded graphite
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/25d4b2b929b24621a90030405c1842d0
work_keys_str_mv	AT marcocuccarese removalofdiclofenacfromaqueoussolutionsbyadsorptiononthermoplasmaexpandedgraphite AT sergiobrutti removalofdiclofenacfromaqueoussolutionsbyadsorptiononthermoplasmaexpandedgraphite AT angeladebonis removalofdiclofenacfromaqueoussolutionsbyadsorptiononthermoplasmaexpandedgraphite AT robertoteghil removalofdiclofenacfromaqueoussolutionsbyadsorptiononthermoplasmaexpandedgraphite AT ignaziomarcellomancini removalofdiclofenacfromaqueoussolutionsbyadsorptiononthermoplasmaexpandedgraphite AT salvatoremasi removalofdiclofenacfromaqueoussolutionsbyadsorptiononthermoplasmaexpandedgraphite AT donatellacaniani removalofdiclofenacfromaqueoussolutionsbyadsorptiononthermoplasmaexpandedgraphite
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Removal of diclofenac from aqueous solutions by adsorption on thermo-plasma expanded graphite

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