Modelling and optimization of hexavalent chromium removal from aqueous solution by adsorption on low-cost agricultural waste biomass using response surface methodological approach

In this study, a response surface methodology (RSM) approach using central composite design (CCD) was investigated to develop a mathematical model and to optimize the effects of pH, adsorbent amount and temperature related to the hexavalent chromium removal by biosorption on peanut shells (PSh). The...

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Autores principales:	Boutheina Rzig, Fatma Guesmi, Mika Sillanpää, Béchir Hamrouni
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	biosorption hexavalent chromium isotherm kinetic peanut shells response surface methodology Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/dec9a3c1d8c94fec86a26e865cc38ed3
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spelling	oai:doaj.org-article:dec9a3c1d8c94fec86a26e865cc38ed32021-11-06T11:16:24ZModelling and optimization of hexavalent chromium removal from aqueous solution by adsorption on low-cost agricultural waste biomass using response surface methodological approach0273-12231996-973210.2166/wst.2021.233https://doaj.org/article/dec9a3c1d8c94fec86a26e865cc38ed32021-08-01T00:00:00Zhttp://wst.iwaponline.com/content/84/3/552https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732In this study, a response surface methodology (RSM) approach using central composite design (CCD) was investigated to develop a mathematical model and to optimize the effects of pH, adsorbent amount and temperature related to the hexavalent chromium removal by biosorption on peanut shells (PSh). The highest removal percentage of 30.28% was found by the predicted model under the optimum conditions (pH of 2.11, 0.73 g of PSh and 37.2 °C) for a 100 mg/L initial Cr(VI) concentration, which was very near to the experimental value (29.92%). The PSh was characterized by SEM, EDX, FTIR, BET, XRD analyses. Moreover, a Langmuir isotherm fitted well (R2 = 0.992) with the experimental data, and the maximum adsorption capacity was discovered to be 2.48 and 3.49 mg/g respectively at 25 and 45 °C. Kinetic data were well foreseen by pseudo second order. Thermodynamic study depicted that biosorption of Cr(VI) onto PSh was spontaneous and endothermic. Regeneration of the PSh using NaOH showed a loss <5% in the Cr(VI) removal efficiency up to three recycle runs. In summary, the Cr(VI) removal onto economic, sensitive and selective biosorbent (PSh) was optimized using CCD to study biosorption behaviors. HIGHLIGHTS Biosorption has been investigated as a solution for Cr(VI) removal from wastewater.; Optimization of Cr(VI) removal on PSh through 3 factors central composite design.; The highest removal yield was obtained for a pH of 2.11, adsorbent amount of 0.73 g and temperature of 37.2 °C.; The maximum adsorption capacity was 3.5 mg/g. Cr(VI) adsorption followed Langmuir isotherm and pseudo-second-order kinetic models.;Boutheina RzigFatma GuesmiMika SillanpääBéchir HamrouniIWA Publishingarticlebiosorptionhexavalent chromiumisothermkineticpeanut shellsresponse surface methodologyEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 3, Pp 552-575 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biosorption hexavalent chromium isotherm kinetic peanut shells response surface methodology Environmental technology. Sanitary engineering TD1-1066
spellingShingle	biosorption hexavalent chromium isotherm kinetic peanut shells response surface methodology Environmental technology. Sanitary engineering TD1-1066 Boutheina Rzig Fatma Guesmi Mika Sillanpää Béchir Hamrouni Modelling and optimization of hexavalent chromium removal from aqueous solution by adsorption on low-cost agricultural waste biomass using response surface methodological approach
description	In this study, a response surface methodology (RSM) approach using central composite design (CCD) was investigated to develop a mathematical model and to optimize the effects of pH, adsorbent amount and temperature related to the hexavalent chromium removal by biosorption on peanut shells (PSh). The highest removal percentage of 30.28% was found by the predicted model under the optimum conditions (pH of 2.11, 0.73 g of PSh and 37.2 °C) for a 100 mg/L initial Cr(VI) concentration, which was very near to the experimental value (29.92%). The PSh was characterized by SEM, EDX, FTIR, BET, XRD analyses. Moreover, a Langmuir isotherm fitted well (R2 = 0.992) with the experimental data, and the maximum adsorption capacity was discovered to be 2.48 and 3.49 mg/g respectively at 25 and 45 °C. Kinetic data were well foreseen by pseudo second order. Thermodynamic study depicted that biosorption of Cr(VI) onto PSh was spontaneous and endothermic. Regeneration of the PSh using NaOH showed a loss <5% in the Cr(VI) removal efficiency up to three recycle runs. In summary, the Cr(VI) removal onto economic, sensitive and selective biosorbent (PSh) was optimized using CCD to study biosorption behaviors. HIGHLIGHTS Biosorption has been investigated as a solution for Cr(VI) removal from wastewater.; Optimization of Cr(VI) removal on PSh through 3 factors central composite design.; The highest removal yield was obtained for a pH of 2.11, adsorbent amount of 0.73 g and temperature of 37.2 °C.; The maximum adsorption capacity was 3.5 mg/g. Cr(VI) adsorption followed Langmuir isotherm and pseudo-second-order kinetic models.;
format	article
author	Boutheina Rzig Fatma Guesmi Mika Sillanpää Béchir Hamrouni
author_facet	Boutheina Rzig Fatma Guesmi Mika Sillanpää Béchir Hamrouni
author_sort	Boutheina Rzig
title	Modelling and optimization of hexavalent chromium removal from aqueous solution by adsorption on low-cost agricultural waste biomass using response surface methodological approach
title_short	Modelling and optimization of hexavalent chromium removal from aqueous solution by adsorption on low-cost agricultural waste biomass using response surface methodological approach
title_full	Modelling and optimization of hexavalent chromium removal from aqueous solution by adsorption on low-cost agricultural waste biomass using response surface methodological approach
title_fullStr	Modelling and optimization of hexavalent chromium removal from aqueous solution by adsorption on low-cost agricultural waste biomass using response surface methodological approach
title_full_unstemmed	Modelling and optimization of hexavalent chromium removal from aqueous solution by adsorption on low-cost agricultural waste biomass using response surface methodological approach
title_sort	modelling and optimization of hexavalent chromium removal from aqueous solution by adsorption on low-cost agricultural waste biomass using response surface methodological approach
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/dec9a3c1d8c94fec86a26e865cc38ed3
work_keys_str_mv	AT boutheinarzig modellingandoptimizationofhexavalentchromiumremovalfromaqueoussolutionbyadsorptiononlowcostagriculturalwastebiomassusingresponsesurfacemethodologicalapproach AT fatmaguesmi modellingandoptimizationofhexavalentchromiumremovalfromaqueoussolutionbyadsorptiononlowcostagriculturalwastebiomassusingresponsesurfacemethodologicalapproach AT mikasillanpaa modellingandoptimizationofhexavalentchromiumremovalfromaqueoussolutionbyadsorptiononlowcostagriculturalwastebiomassusingresponsesurfacemethodologicalapproach AT bechirhamrouni modellingandoptimizationofhexavalentchromiumremovalfromaqueoussolutionbyadsorptiononlowcostagriculturalwastebiomassusingresponsesurfacemethodologicalapproach
_version_	1718443764170620928

Modelling and optimization of hexavalent chromium removal from aqueous solution by adsorption on low-cost agricultural waste biomass using response surface methodological approach

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