Elimination of Escherichia coli in a Packed Column Containing Jujube Seed Kernel Granular Activated Carbon Coated With Silver Nanoparticles (Ag-NPs/GAC)
This study aims to develop a filter material capable of inhibiting bacterial growth and eliminating microorganisms from filtered water. Granular activated carbon (GAC) was prepared from jujube seed kernels by a chemical activation method whereby the kernels were heated at 650°C for 3 h in the presen...
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| Format: | Article |
| Language: | English |
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Wiley
2025-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/joch/2260823 |
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| author | Ngounou M. Kameni Mengue Nsoe Esegni V. Amba Guillaume Kofa Koungou S. Ndi Guifo J. Kayem |
| author_facet | Ngounou M. Kameni Mengue Nsoe Esegni V. Amba Guillaume Kofa Koungou S. Ndi Guifo J. Kayem |
| author_sort | Ngounou M. Kameni |
| collection | DOAJ |
| description | This study aims to develop a filter material capable of inhibiting bacterial growth and eliminating microorganisms from filtered water. Granular activated carbon (GAC) was prepared from jujube seed kernels by a chemical activation method whereby the kernels were heated at 650°C for 3 h in the presence of varied concentrations of phosphoric acid (H3PO4) (1, 2 and 3 M). Silver nanoparticles (Ag-NPs) were prepared using the polysaccharide reduction method with AgNO3 at two concentrations (2 and 4 mmol). The Ag-NPs obtained were characterised by a UV–visible spectrophotometer, optical microscope and microorganism inhibition test. GAC was coated with Ag-NPs by impregnating it with a fixed concentration of Ag-NPs in a supersaturated solution. The resulting GAC and Ag-NPs/GAC were characterised using several methods (pH, point zero charge and FTIR). The leakage of Ag fixed on GAC was evaluated. The antimicrobial properties of the synthesised Ag-NPs/GAC were investigated using inhibition zone, impregnation and column techniques against E. coli. The best nanoparticle shape with a large reactive surface was obtained after treatment with 2 mmol of AgNO3. There was no leaching of Ag ions in the treated water after passage through the bed. Except for the GAC not impregnated with Ag-NPs, no E. coli CFU/mL was found in the filtered water obtained from Ag-NPs/GAC beds at all tested pHs after 2–3 days of operation. |
| format | Article |
| id | doaj-art-e8dd44748c694e16b8912e706fafcf9d |
| institution | DOAJ |
| issn | 2090-9071 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-e8dd44748c694e16b8912e706fafcf9d2025-08-20T02:45:42ZengWileyJournal of Chemistry2090-90712025-01-01202510.1155/joch/2260823Elimination of Escherichia coli in a Packed Column Containing Jujube Seed Kernel Granular Activated Carbon Coated With Silver Nanoparticles (Ag-NPs/GAC)Ngounou M. Kameni0Mengue Nsoe1Esegni V. Amba2Guillaume Kofa3Koungou S. Ndi4Guifo J. Kayem5Department of Process EngineeringDepartment of Process EngineeringDepartment of Process EngineeringDepartment of Process EngineeringDepartment of Process EngineeringDepartment of Process EngineeringThis study aims to develop a filter material capable of inhibiting bacterial growth and eliminating microorganisms from filtered water. Granular activated carbon (GAC) was prepared from jujube seed kernels by a chemical activation method whereby the kernels were heated at 650°C for 3 h in the presence of varied concentrations of phosphoric acid (H3PO4) (1, 2 and 3 M). Silver nanoparticles (Ag-NPs) were prepared using the polysaccharide reduction method with AgNO3 at two concentrations (2 and 4 mmol). The Ag-NPs obtained were characterised by a UV–visible spectrophotometer, optical microscope and microorganism inhibition test. GAC was coated with Ag-NPs by impregnating it with a fixed concentration of Ag-NPs in a supersaturated solution. The resulting GAC and Ag-NPs/GAC were characterised using several methods (pH, point zero charge and FTIR). The leakage of Ag fixed on GAC was evaluated. The antimicrobial properties of the synthesised Ag-NPs/GAC were investigated using inhibition zone, impregnation and column techniques against E. coli. The best nanoparticle shape with a large reactive surface was obtained after treatment with 2 mmol of AgNO3. There was no leaching of Ag ions in the treated water after passage through the bed. Except for the GAC not impregnated with Ag-NPs, no E. coli CFU/mL was found in the filtered water obtained from Ag-NPs/GAC beds at all tested pHs after 2–3 days of operation.http://dx.doi.org/10.1155/joch/2260823 |
| spellingShingle | Ngounou M. Kameni Mengue Nsoe Esegni V. Amba Guillaume Kofa Koungou S. Ndi Guifo J. Kayem Elimination of Escherichia coli in a Packed Column Containing Jujube Seed Kernel Granular Activated Carbon Coated With Silver Nanoparticles (Ag-NPs/GAC) Journal of Chemistry |
| title | Elimination of Escherichia coli in a Packed Column Containing Jujube Seed Kernel Granular Activated Carbon Coated With Silver Nanoparticles (Ag-NPs/GAC) |
| title_full | Elimination of Escherichia coli in a Packed Column Containing Jujube Seed Kernel Granular Activated Carbon Coated With Silver Nanoparticles (Ag-NPs/GAC) |
| title_fullStr | Elimination of Escherichia coli in a Packed Column Containing Jujube Seed Kernel Granular Activated Carbon Coated With Silver Nanoparticles (Ag-NPs/GAC) |
| title_full_unstemmed | Elimination of Escherichia coli in a Packed Column Containing Jujube Seed Kernel Granular Activated Carbon Coated With Silver Nanoparticles (Ag-NPs/GAC) |
| title_short | Elimination of Escherichia coli in a Packed Column Containing Jujube Seed Kernel Granular Activated Carbon Coated With Silver Nanoparticles (Ag-NPs/GAC) |
| title_sort | elimination of escherichia coli in a packed column containing jujube seed kernel granular activated carbon coated with silver nanoparticles ag nps gac |
| url | http://dx.doi.org/10.1155/joch/2260823 |
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