Synthesis and evaluation of a new CeO2@starch nanocomposite particles for efficient removal of toxic Cr(VI) ions
This study presents the synthesis and characterization of a highly effective nanocomposite material, CeO2@starch, designed for the removal of Cr(VI) from aqueous solutions. Through a series of experiments and analyses, we investigated the adsorption efficiency of the CeO2@starch nanocomposite by con...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Energy Nexus |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772427123000748 |
| _version_ | 1797394768690413568 |
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| author | Oluwafikayo O. Jaiyeola Hamza Annath Chirangano Mangwandi |
| author_facet | Oluwafikayo O. Jaiyeola Hamza Annath Chirangano Mangwandi |
| author_sort | Oluwafikayo O. Jaiyeola |
| collection | DOAJ |
| description | This study presents the synthesis and characterization of a highly effective nanocomposite material, CeO2@starch, designed for the removal of Cr(VI) from aqueous solutions. Through a series of experiments and analyses, we investigated the adsorption efficiency of the CeO2@starch nanocomposite by considering various factors such as contact duration, pH levels, initial Cr(VI) concentration, and temperature. Firstly, we successfully synthesized the CeO2@starch nanocomposite and conducted comprehensive characterizations using BET, FTIR, and SEM analyses. These characterizations provided valuable insights into the structure and properties of the nanocomposite, confirming its potential as a promising adsorbent for Cr(VI) removal. In our experiments, we observed that the CeO2@starch nanocomposite exhibited an impressive capacity for reducing Cr(VI) ions to Cr(III) in aqueous solutions. Notably, the adsorption efficiency was found to be at its maximum at pH 2, and equilibrium was achieved within 240 min of contact time. The kinetics of the adsorption process were accurately described by the pseudo 1st order equation, which displayed a high correlation coefficient (greater than 0.99), indicating the reliability of this model. Furthermore, we compared various adsorption isotherm models to describe the data obtained, including Freundlich, Sips, Redlich-Peterson, Temkin, and Langmuir models. The Langmuir isotherm model demonstrated the best fit, emphasizing the monolayer adsorption of Cr(VI) onto the CeO2@starch nanocomposite and confirming its superior performance compared to other models. The Langmuir adsorption capacity of the nanocomposite material was measured at 22℃ and found to be 48.54 mg/g. Interestingly, the adsorption capacity increased with higher temperatures, suggesting an endothermic adsorption process. To gain further insights into the nature of the adsorption, we performed thermodynamic analysis, revealing that the adsorption of hexavalent Cr onto the CeO2@starch nanocomposite was spontaneous and had a chemical nature. |
| first_indexed | 2024-03-09T00:24:27Z |
| format | Article |
| id | doaj.art-96e98683e9c042a6b3a415a7f73f9489 |
| institution | Directory Open Access Journal |
| issn | 2772-4271 |
| language | English |
| last_indexed | 2024-03-09T00:24:27Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Nexus |
| spelling | doaj.art-96e98683e9c042a6b3a415a7f73f94892023-12-12T04:36:52ZengElsevierEnergy Nexus2772-42712023-12-0112100244Synthesis and evaluation of a new CeO2@starch nanocomposite particles for efficient removal of toxic Cr(VI) ionsOluwafikayo O. Jaiyeola0Hamza Annath1Chirangano Mangwandi2School of Chemistry and Chemical Engineering, Queen's University Belfast, Stranmillis Road, Belfast BT6 8JA, UKSchool of Chemistry and Chemical Engineering, Queen's University Belfast, Stranmillis Road, Belfast BT6 8JA, UK; Department of Chemistry, Lancaster University, Bailrigg, Lancaster LA1 4YB, UKSchool of Chemistry and Chemical Engineering, Queen's University Belfast, Stranmillis Road, Belfast BT6 8JA, UK; Corresponding author.This study presents the synthesis and characterization of a highly effective nanocomposite material, CeO2@starch, designed for the removal of Cr(VI) from aqueous solutions. Through a series of experiments and analyses, we investigated the adsorption efficiency of the CeO2@starch nanocomposite by considering various factors such as contact duration, pH levels, initial Cr(VI) concentration, and temperature. Firstly, we successfully synthesized the CeO2@starch nanocomposite and conducted comprehensive characterizations using BET, FTIR, and SEM analyses. These characterizations provided valuable insights into the structure and properties of the nanocomposite, confirming its potential as a promising adsorbent for Cr(VI) removal. In our experiments, we observed that the CeO2@starch nanocomposite exhibited an impressive capacity for reducing Cr(VI) ions to Cr(III) in aqueous solutions. Notably, the adsorption efficiency was found to be at its maximum at pH 2, and equilibrium was achieved within 240 min of contact time. The kinetics of the adsorption process were accurately described by the pseudo 1st order equation, which displayed a high correlation coefficient (greater than 0.99), indicating the reliability of this model. Furthermore, we compared various adsorption isotherm models to describe the data obtained, including Freundlich, Sips, Redlich-Peterson, Temkin, and Langmuir models. The Langmuir isotherm model demonstrated the best fit, emphasizing the monolayer adsorption of Cr(VI) onto the CeO2@starch nanocomposite and confirming its superior performance compared to other models. The Langmuir adsorption capacity of the nanocomposite material was measured at 22℃ and found to be 48.54 mg/g. Interestingly, the adsorption capacity increased with higher temperatures, suggesting an endothermic adsorption process. To gain further insights into the nature of the adsorption, we performed thermodynamic analysis, revealing that the adsorption of hexavalent Cr onto the CeO2@starch nanocomposite was spontaneous and had a chemical nature.http://www.sciencedirect.com/science/article/pii/S2772427123000748Cerium OxideCr(VI)StarchCross-linkingAdsorptionReduction |
| spellingShingle | Oluwafikayo O. Jaiyeola Hamza Annath Chirangano Mangwandi Synthesis and evaluation of a new CeO2@starch nanocomposite particles for efficient removal of toxic Cr(VI) ions Energy Nexus Cerium Oxide Cr(VI) Starch Cross-linking Adsorption Reduction |
| title | Synthesis and evaluation of a new CeO2@starch nanocomposite particles for efficient removal of toxic Cr(VI) ions |
| title_full | Synthesis and evaluation of a new CeO2@starch nanocomposite particles for efficient removal of toxic Cr(VI) ions |
| title_fullStr | Synthesis and evaluation of a new CeO2@starch nanocomposite particles for efficient removal of toxic Cr(VI) ions |
| title_full_unstemmed | Synthesis and evaluation of a new CeO2@starch nanocomposite particles for efficient removal of toxic Cr(VI) ions |
| title_short | Synthesis and evaluation of a new CeO2@starch nanocomposite particles for efficient removal of toxic Cr(VI) ions |
| title_sort | synthesis and evaluation of a new ceo2 starch nanocomposite particles for efficient removal of toxic cr vi ions |
| topic | Cerium Oxide Cr(VI) Starch Cross-linking Adsorption Reduction |
| url | http://www.sciencedirect.com/science/article/pii/S2772427123000748 |
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