Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous Medium

Industrial discharges loaded with heavy metals present several problems for aquatic ecosystems and human health. In this context, the present study aims to evaluate the potential of raw spent coffee grounds to remove chromium from an aqueous medium. A structural and textural study of coffee grounds...

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Main Authors: Ilyasse Loulidi, Fatima Boukhlifi, Mbarka Ouchabi, Abdelouahed Amar, Maria Jabri, Abderahim Kali, Chaimaa Hadey
Format: Article
Language:English
Published: Hindawi Limited 2021-01-01
Series:International Journal of Chemical Engineering
Online Access:http://dx.doi.org/10.1155/2021/9977817
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spelling doaj-fe223e6fae5245a2bae40ecca3ce00412021-06-21T02:25:17ZengHindawi LimitedInternational Journal of Chemical Engineering1687-80782021-01-01202110.1155/2021/9977817Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous MediumIlyasse Loulidi0Fatima Boukhlifi1Mbarka Ouchabi2Abdelouahed Amar3Maria Jabri4Abderahim Kali5Chaimaa Hadey6Laboratory of Chemistry and Biology Applied to the EnvironmentLaboratory of Chemistry and Biology Applied to the EnvironmentLaboratory of Catalysis and Corrosion of MaterialsLaboratory of Chemistry and Biology Applied to the EnvironmentLaboratory of Chemistry and Biology Applied to the EnvironmentLaboratory of Chemistry and Biology Applied to the EnvironmentEngineering Sciences and Trades LaboratoryIndustrial discharges loaded with heavy metals present several problems for aquatic ecosystems and human health. In this context, the present study aims to evaluate the potential of raw spent coffee grounds to remove chromium from an aqueous medium. A structural and textural study of coffee grounds was carried out by FTIR, XRD, and TGA analysis. The optimum conditions for the removal of Cr(VI), for a solution with an initial concentration of 100 mg/l, were adsorbent dose 2.5 g/l, pH 4.0, and contact time 90 min. The adsorption equilibrium results show that the Langmuir isotherm best describes the process with an adsorption capacity of 42.9 mg/g and that the adsorption kinetics follows the pseudosecond-order model. The calculated thermodynamic parameters showed that the adsorption is exothermic and spontaneous. The activation energy value (Ea) indicated that the retention is physisorptive in nature. The regeneration of the adsorbent was carried out by three eluents, among which HCl was the best. Finally, a brief cost estimation showed the great potential of coffee grounds as a low-cost adsorbent.http://dx.doi.org/10.1155/2021/9977817
collection DOAJ
language English
format Article
sources DOAJ
author Ilyasse Loulidi
Fatima Boukhlifi
Mbarka Ouchabi
Abdelouahed Amar
Maria Jabri
Abderahim Kali
Chaimaa Hadey
spellingShingle Ilyasse Loulidi
Fatima Boukhlifi
Mbarka Ouchabi
Abdelouahed Amar
Maria Jabri
Abderahim Kali
Chaimaa Hadey
Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous Medium
International Journal of Chemical Engineering
author_facet Ilyasse Loulidi
Fatima Boukhlifi
Mbarka Ouchabi
Abdelouahed Amar
Maria Jabri
Abderahim Kali
Chaimaa Hadey
author_sort Ilyasse Loulidi
title Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous Medium
title_short Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous Medium
title_full Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous Medium
title_fullStr Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous Medium
title_full_unstemmed Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous Medium
title_sort assessment of untreated coffee wastes for the removal of chromium (vi) from aqueous medium
publisher Hindawi Limited
series International Journal of Chemical Engineering
issn 1687-8078
publishDate 2021-01-01
description Industrial discharges loaded with heavy metals present several problems for aquatic ecosystems and human health. In this context, the present study aims to evaluate the potential of raw spent coffee grounds to remove chromium from an aqueous medium. A structural and textural study of coffee grounds was carried out by FTIR, XRD, and TGA analysis. The optimum conditions for the removal of Cr(VI), for a solution with an initial concentration of 100 mg/l, were adsorbent dose 2.5 g/l, pH 4.0, and contact time 90 min. The adsorption equilibrium results show that the Langmuir isotherm best describes the process with an adsorption capacity of 42.9 mg/g and that the adsorption kinetics follows the pseudosecond-order model. The calculated thermodynamic parameters showed that the adsorption is exothermic and spontaneous. The activation energy value (Ea) indicated that the retention is physisorptive in nature. The regeneration of the adsorbent was carried out by three eluents, among which HCl was the best. Finally, a brief cost estimation showed the great potential of coffee grounds as a low-cost adsorbent.
url http://dx.doi.org/10.1155/2021/9977817
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