Amine-functionalized cellulose-silica composites for the remediation of hexavalent chromium (Cr IV) in contaminated water
Adsorption method for Hexavalent chromium (Cr(VI) removal from domestic and industrial wastewater is widely desirable due to public health concern of the heavy metal. The purpose of this study was to investigate the evaluation of Cr(VI) adsorption using a novel adsorbent: amine-functionalized cellul...
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| Language: | English |
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Elsevier
2024-10-01
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| Series: | Results in Chemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211715624004922 |
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| author | Mayenzeke Trueman Mazibuko Stanley Chibuzor Onwubu Phumlane Selby Mdluli Vimla Paul Mokhena Clement Teboho Mokhothu Thabang |
| author_facet | Mayenzeke Trueman Mazibuko Stanley Chibuzor Onwubu Phumlane Selby Mdluli Vimla Paul Mokhena Clement Teboho Mokhothu Thabang |
| author_sort | Mayenzeke Trueman Mazibuko |
| collection | DOAJ |
| description | Adsorption method for Hexavalent chromium (Cr(VI) removal from domestic and industrial wastewater is widely desirable due to public health concern of the heavy metal. The purpose of this study was to investigate the evaluation of Cr(VI) adsorption using a novel adsorbent: amine-functionalized cellulose-silica composite derived from banana fibers. We employed the in-situ sol–gel method to create cellulose-silica silane functionalized composites, analyzing them through different characterization techniques such as Attenuated total reflectance- Fourier transform infrared spectroscopy (ATR-FTIR), X-ray Diffraction Analysis (XRD), Thermo gravimetric analysis (TGA)/differential thermogravimetric (DTG), Brunauer–Emmett–Teller (BET), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM) techniques. ATR-FTIR depicted key organic constituents in raw banana pseudo stem fibers (BF) and the formation of SiO bonds in BCSiO2 composite, and further enhanced by the grafting of N-[3-(trimethoxysilyl)propyl ethylenediamine (DAPTMS) onto the BC-SiO2 surface in BC-SiO2-DAPTMS. XRD and TGA/DTG analyses revealed changes in crystallinity and thermal stability, while BET analysis showcased altered surface area and pore characteristics in BC-SiO2-DAPTMS (2 %). SEM and TEM imaging provided visual evidence of structural modifications and improved dispersion in BC-SiO2-DAPTMS composites. The impact of composite weight, contact time, and pH on Cr(VI) removal rates was examined, revealing optimal performance at slightly acidic pH 4 value (80.7 %) and enhanced efficiency with increased contact time of 65 min (86.66 %), composite weight of 1 g (82.62 %), and initial concentration was for 0.8 mg/l (80 %). The kinetics and isotherms analyzed using pseudo second order (PSO) and pseudo first order (PFO) models, highlight the composite’s efficiency. The Freundlich model was found to better fit the adsorption isotherm data, while the PSO model described the kinetics more accurately. These insights contribute to optimizing the BC-SiO2-DAPTMS (2 %) composite for efficient Cr(VI) ion removal in water treatment applications. |
| format | Article |
| id | doaj-art-9f9b7c18ca8141dd802859481d7dc264 |
| institution | OA Journals |
| issn | 2211-7156 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Elsevier |
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| series | Results in Chemistry |
| spelling | doaj-art-9f9b7c18ca8141dd802859481d7dc2642025-08-20T01:50:45ZengElsevierResults in Chemistry2211-71562024-10-011110179610.1016/j.rechem.2024.101796Amine-functionalized cellulose-silica composites for the remediation of hexavalent chromium (Cr IV) in contaminated waterMayenzeke Trueman Mazibuko0Stanley Chibuzor Onwubu1Phumlane Selby Mdluli2Vimla Paul3Mokhena Clement Teboho4Mokhothu Thabang5Chemistry Department, Durban University of Technology, Durban, South AfricaChemistry Department, Durban University of Technology, Durban, South Africa; Corresponding author.Chemistry Department, Durban University of Technology, Durban, South Africa; Health Platform, Advanced Materials Division, Mintek, Randburg, South AfricaChemistry Department, Durban University of Technology, Durban, South AfricaHealth Platform, Advanced Materials Division, Mintek, Randburg, South AfricaChemistry Department, Durban University of Technology, Durban, South AfricaAdsorption method for Hexavalent chromium (Cr(VI) removal from domestic and industrial wastewater is widely desirable due to public health concern of the heavy metal. The purpose of this study was to investigate the evaluation of Cr(VI) adsorption using a novel adsorbent: amine-functionalized cellulose-silica composite derived from banana fibers. We employed the in-situ sol–gel method to create cellulose-silica silane functionalized composites, analyzing them through different characterization techniques such as Attenuated total reflectance- Fourier transform infrared spectroscopy (ATR-FTIR), X-ray Diffraction Analysis (XRD), Thermo gravimetric analysis (TGA)/differential thermogravimetric (DTG), Brunauer–Emmett–Teller (BET), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM) techniques. ATR-FTIR depicted key organic constituents in raw banana pseudo stem fibers (BF) and the formation of SiO bonds in BCSiO2 composite, and further enhanced by the grafting of N-[3-(trimethoxysilyl)propyl ethylenediamine (DAPTMS) onto the BC-SiO2 surface in BC-SiO2-DAPTMS. XRD and TGA/DTG analyses revealed changes in crystallinity and thermal stability, while BET analysis showcased altered surface area and pore characteristics in BC-SiO2-DAPTMS (2 %). SEM and TEM imaging provided visual evidence of structural modifications and improved dispersion in BC-SiO2-DAPTMS composites. The impact of composite weight, contact time, and pH on Cr(VI) removal rates was examined, revealing optimal performance at slightly acidic pH 4 value (80.7 %) and enhanced efficiency with increased contact time of 65 min (86.66 %), composite weight of 1 g (82.62 %), and initial concentration was for 0.8 mg/l (80 %). The kinetics and isotherms analyzed using pseudo second order (PSO) and pseudo first order (PFO) models, highlight the composite’s efficiency. The Freundlich model was found to better fit the adsorption isotherm data, while the PSO model described the kinetics more accurately. These insights contribute to optimizing the BC-SiO2-DAPTMS (2 %) composite for efficient Cr(VI) ion removal in water treatment applications.http://www.sciencedirect.com/science/article/pii/S2211715624004922Hexavalent chromium (Cr(VI))AdsorptionAdsorption isothermsBleach celluloseSilicaComposites |
| spellingShingle | Mayenzeke Trueman Mazibuko Stanley Chibuzor Onwubu Phumlane Selby Mdluli Vimla Paul Mokhena Clement Teboho Mokhothu Thabang Amine-functionalized cellulose-silica composites for the remediation of hexavalent chromium (Cr IV) in contaminated water Results in Chemistry Hexavalent chromium (Cr(VI)) Adsorption Adsorption isotherms Bleach cellulose Silica Composites |
| title | Amine-functionalized cellulose-silica composites for the remediation of hexavalent chromium (Cr IV) in contaminated water |
| title_full | Amine-functionalized cellulose-silica composites for the remediation of hexavalent chromium (Cr IV) in contaminated water |
| title_fullStr | Amine-functionalized cellulose-silica composites for the remediation of hexavalent chromium (Cr IV) in contaminated water |
| title_full_unstemmed | Amine-functionalized cellulose-silica composites for the remediation of hexavalent chromium (Cr IV) in contaminated water |
| title_short | Amine-functionalized cellulose-silica composites for the remediation of hexavalent chromium (Cr IV) in contaminated water |
| title_sort | amine functionalized cellulose silica composites for the remediation of hexavalent chromium cr iv in contaminated water |
| topic | Hexavalent chromium (Cr(VI)) Adsorption Adsorption isotherms Bleach cellulose Silica Composites |
| url | http://www.sciencedirect.com/science/article/pii/S2211715624004922 |
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