Evaluation of Activated Carbons Prepared from Bioprecursors for the Removal of Cadmium and Chromium (VI)
Trace metals found in industrial effluents are highly toxic pollutants, and these include cadmium and chromium (VI). The objective of this work is to remove cadmium and chromium (VI) on activated carbons, prepared from biomaterials such as nuclei of Ziziphus lotus and coffee grounds. The characteriz...
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| Format: | Article |
| Language: | English |
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Wiley
2024-01-01
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| Series: | Applied and Environmental Soil Science |
| Online Access: | http://dx.doi.org/10.1155/2024/8663114 |
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| author | Ibrahim Touzani Imane El Machrafi Kaoutar Harboul Otmane Boudouch Imad Alouiz Khalil Hammani Rachid Flouchi Kawtar Fikri-Benbrahim |
| author_facet | Ibrahim Touzani Imane El Machrafi Kaoutar Harboul Otmane Boudouch Imad Alouiz Khalil Hammani Rachid Flouchi Kawtar Fikri-Benbrahim |
| author_sort | Ibrahim Touzani |
| collection | DOAJ |
| description | Trace metals found in industrial effluents are highly toxic pollutants, and these include cadmium and chromium (VI). The objective of this work is to remove cadmium and chromium (VI) on activated carbons, prepared from biomaterials such as nuclei of Ziziphus lotus and coffee grounds. The characterization of adsorbents was performed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results of the characterization showed an important porosity on the activated carbon’s surface, with sizes between 6 and 50 μm. Similarly, the adsorption results showed that the adsorption process is very rapid and that the increase in contact time and temperature improves the efficiency of the Cd and Cr(VI) removal process. Indeed, abatement rates (R%) of 80% for Cr(VI) and 60% for Cd were obtained after 80 minutes of adsorption on activated carbon prepared from Ziziphus lotus, whereas activated carbon obtained from coffee grounds allows a reduction rate of about 50% for Cr(VI) and Cd. Hence, it seems clearly that the activated carbon of Ziziphus lotus is more effective than that of coffee grounds, especially for the Cr(VI) adsorption. The kinetic modeling of the adsorption process followed the pseudo-second-order model, and the Freundlich model has better explained the adsorption isotherm for Cd and Cr(VI). The thermodynamic study showed that adsorption was spontaneous and endothermic. |
| format | Article |
| id | doaj-art-17f5de0d9d8a4cf581fca1ad85c1ad7e |
| institution | OA Journals |
| issn | 1687-7675 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Applied and Environmental Soil Science |
| spelling | doaj-art-17f5de0d9d8a4cf581fca1ad85c1ad7e2025-08-20T02:02:28ZengWileyApplied and Environmental Soil Science1687-76752024-01-01202410.1155/2024/8663114Evaluation of Activated Carbons Prepared from Bioprecursors for the Removal of Cadmium and Chromium (VI)Ibrahim Touzani0Imane El Machrafi1Kaoutar Harboul2Otmane Boudouch3Imad Alouiz4Khalil Hammani5Rachid Flouchi6Kawtar Fikri-Benbrahim7Laboratory of Microbial Biotechnology and Bioactive MoleculesLaboratory of Geosystem-Environment and Sustainable DevelopmentNatural Resources and Environment LaboratorySciences and Technologies TeamNatural Resources and Environment LaboratoryNatural Resources and Environment LaboratoryLaboratory of Microbial Biotechnology and Bioactive MoleculesLaboratory of Microbial Biotechnology and Bioactive MoleculesTrace metals found in industrial effluents are highly toxic pollutants, and these include cadmium and chromium (VI). The objective of this work is to remove cadmium and chromium (VI) on activated carbons, prepared from biomaterials such as nuclei of Ziziphus lotus and coffee grounds. The characterization of adsorbents was performed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results of the characterization showed an important porosity on the activated carbon’s surface, with sizes between 6 and 50 μm. Similarly, the adsorption results showed that the adsorption process is very rapid and that the increase in contact time and temperature improves the efficiency of the Cd and Cr(VI) removal process. Indeed, abatement rates (R%) of 80% for Cr(VI) and 60% for Cd were obtained after 80 minutes of adsorption on activated carbon prepared from Ziziphus lotus, whereas activated carbon obtained from coffee grounds allows a reduction rate of about 50% for Cr(VI) and Cd. Hence, it seems clearly that the activated carbon of Ziziphus lotus is more effective than that of coffee grounds, especially for the Cr(VI) adsorption. The kinetic modeling of the adsorption process followed the pseudo-second-order model, and the Freundlich model has better explained the adsorption isotherm for Cd and Cr(VI). The thermodynamic study showed that adsorption was spontaneous and endothermic.http://dx.doi.org/10.1155/2024/8663114 |
| spellingShingle | Ibrahim Touzani Imane El Machrafi Kaoutar Harboul Otmane Boudouch Imad Alouiz Khalil Hammani Rachid Flouchi Kawtar Fikri-Benbrahim Evaluation of Activated Carbons Prepared from Bioprecursors for the Removal of Cadmium and Chromium (VI) Applied and Environmental Soil Science |
| title | Evaluation of Activated Carbons Prepared from Bioprecursors for the Removal of Cadmium and Chromium (VI) |
| title_full | Evaluation of Activated Carbons Prepared from Bioprecursors for the Removal of Cadmium and Chromium (VI) |
| title_fullStr | Evaluation of Activated Carbons Prepared from Bioprecursors for the Removal of Cadmium and Chromium (VI) |
| title_full_unstemmed | Evaluation of Activated Carbons Prepared from Bioprecursors for the Removal of Cadmium and Chromium (VI) |
| title_short | Evaluation of Activated Carbons Prepared from Bioprecursors for the Removal of Cadmium and Chromium (VI) |
| title_sort | evaluation of activated carbons prepared from bioprecursors for the removal of cadmium and chromium vi |
| url | http://dx.doi.org/10.1155/2024/8663114 |
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