Studies on the Removal of Cadmium Toxic Metal Ions by Natural Clays from Aqueous Solution by Adsorption Process
The aim of this study is the valorization of the Moroccan clays (QC-MC and QC-MT) from the Middle Atlas region as adsorbents for the treatment of water contaminated by cadmium Cd (II) ions. The physicochemical properties of natural clays are characterized by ICP-MS, XRD, FTIR, and SEM techniques. Th...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2021/7873488 |
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| author | Rajaa Bassam Achraf El hallaoui Marouane El Alouani Maissara Jabrane El Hassan El Khattabi Malika Tridane Said Belaaouad |
| author_facet | Rajaa Bassam Achraf El hallaoui Marouane El Alouani Maissara Jabrane El Hassan El Khattabi Malika Tridane Said Belaaouad |
| author_sort | Rajaa Bassam |
| collection | DOAJ |
| description | The aim of this study is the valorization of the Moroccan clays (QC-MC and QC-MT) from the Middle Atlas region as adsorbents for the treatment of water contaminated by cadmium Cd (II) ions. The physicochemical properties of natural clays are characterized by ICP-MS, XRD, FTIR, and SEM techniques. The adsorption process is investigated as a function of adsorbent mass, solution pH, contact time, temperature, and initial Cd (II) ion concentration. The kinetic investigation shows that the adsorption equilibrium of Cd (II) ions by both natural clays is reached after 30 min for QC-MT and 45 min for QC-MC and fits well to a pseudo-second-order kinetic model. The isotherm study is best fitted by a Freundlich model, with the maximum adsorption capacity determined by the linear form of the Freundlich isotherm being 4.23 mg/g for QC-MC and 5.85 mg/g for QC-MT at 25°C. The cadmium adsorption process was thermodynamically spontaneous and exothermic. The regeneration process showed that these natural clays had excellent recycling capacity. Characterization of the Moroccan natural clays before and after the adsorption process through FTIR, SEM, XRD, and EDX techniques confirmed the Cd (II) ion adsorption on the surfaces of both natural clay adsorbents. Overall, the high adsorption capacity of both natural clays for Cd (II) ions removal compared to other adsorbents motioned in the literature indicated that these two natural adsorbents are excellent candidates for heavy metal removal from aqueous environments. |
| format | Article |
| id | doaj-art-712c4514a7ab4bc984783eea24546622 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-712c4514a7ab4bc984783eea245466222025-02-03T05:43:46ZengWileyJournal of Chemistry2090-90632090-90712021-01-01202110.1155/2021/78734887873488Studies on the Removal of Cadmium Toxic Metal Ions by Natural Clays from Aqueous Solution by Adsorption ProcessRajaa Bassam0Achraf El hallaoui1Marouane El Alouani2Maissara Jabrane3El Hassan El Khattabi4Malika Tridane5Said Belaaouad6Laboratory of Physical Chemistry of Materials LCPM, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Bd CdtDriss El Harti, Casablanca, MoroccoLaboratory of Organic, Organometallic and Theoretical Chemistry, University Ibn Tofail, Faculty of Science, B.P. 133, Kenitra 14000, MoroccoLaboratory of Physico-Chemistry of Inorganic and Organic Materials (LPCIOM), Materials Science Centre (MSC), Mohammed V University, Ecole Normale Supérieure (ENS), Rabat, MoroccoLaboratory of Physical Chemistry of Materials LCPM, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Bd CdtDriss El Harti, Casablanca, MoroccoLaboratory of Physical Chemistry of Materials LCPM, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Bd CdtDriss El Harti, Casablanca, MoroccoLaboratory of Physical Chemistry of Materials LCPM, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Bd CdtDriss El Harti, Casablanca, MoroccoLaboratory of Physical Chemistry of Materials LCPM, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Bd CdtDriss El Harti, Casablanca, MoroccoThe aim of this study is the valorization of the Moroccan clays (QC-MC and QC-MT) from the Middle Atlas region as adsorbents for the treatment of water contaminated by cadmium Cd (II) ions. The physicochemical properties of natural clays are characterized by ICP-MS, XRD, FTIR, and SEM techniques. The adsorption process is investigated as a function of adsorbent mass, solution pH, contact time, temperature, and initial Cd (II) ion concentration. The kinetic investigation shows that the adsorption equilibrium of Cd (II) ions by both natural clays is reached after 30 min for QC-MT and 45 min for QC-MC and fits well to a pseudo-second-order kinetic model. The isotherm study is best fitted by a Freundlich model, with the maximum adsorption capacity determined by the linear form of the Freundlich isotherm being 4.23 mg/g for QC-MC and 5.85 mg/g for QC-MT at 25°C. The cadmium adsorption process was thermodynamically spontaneous and exothermic. The regeneration process showed that these natural clays had excellent recycling capacity. Characterization of the Moroccan natural clays before and after the adsorption process through FTIR, SEM, XRD, and EDX techniques confirmed the Cd (II) ion adsorption on the surfaces of both natural clay adsorbents. Overall, the high adsorption capacity of both natural clays for Cd (II) ions removal compared to other adsorbents motioned in the literature indicated that these two natural adsorbents are excellent candidates for heavy metal removal from aqueous environments.http://dx.doi.org/10.1155/2021/7873488 |
| spellingShingle | Rajaa Bassam Achraf El hallaoui Marouane El Alouani Maissara Jabrane El Hassan El Khattabi Malika Tridane Said Belaaouad Studies on the Removal of Cadmium Toxic Metal Ions by Natural Clays from Aqueous Solution by Adsorption Process Journal of Chemistry |
| title | Studies on the Removal of Cadmium Toxic Metal Ions by Natural Clays from Aqueous Solution by Adsorption Process |
| title_full | Studies on the Removal of Cadmium Toxic Metal Ions by Natural Clays from Aqueous Solution by Adsorption Process |
| title_fullStr | Studies on the Removal of Cadmium Toxic Metal Ions by Natural Clays from Aqueous Solution by Adsorption Process |
| title_full_unstemmed | Studies on the Removal of Cadmium Toxic Metal Ions by Natural Clays from Aqueous Solution by Adsorption Process |
| title_short | Studies on the Removal of Cadmium Toxic Metal Ions by Natural Clays from Aqueous Solution by Adsorption Process |
| title_sort | studies on the removal of cadmium toxic metal ions by natural clays from aqueous solution by adsorption process |
| url | http://dx.doi.org/10.1155/2021/7873488 |
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