Biosorption of <i>Escherichia coli</i> Using ZnO-Trimethyl Chitosan Nanocomposite Hydrogel Formed by the Green Synthesis Route
In this study, we tested the biosorption capacity of trimethyl chitosan (TMC)-ZnO nanocomposite (NC) for the adsorptive removal of <i>Escherichia coli</i> (<i>E. coli</i>) in aqueous suspension. For the formation of ZnO NPs, we followed the green synthesis route involving <...
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MDPI AG
2023-07-01
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| Online Access: | https://www.mdpi.com/2310-2861/9/7/581 |
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| author | Ibrahim Birma Bwatanglang Faruq Mohammad John Nahadi Janet Wasmia Mohammed Dahan Hamad A. Al-Lohedan Ahmed A. Soleiman |
| author_facet | Ibrahim Birma Bwatanglang Faruq Mohammad John Nahadi Janet Wasmia Mohammed Dahan Hamad A. Al-Lohedan Ahmed A. Soleiman |
| author_sort | Ibrahim Birma Bwatanglang |
| collection | DOAJ |
| description | In this study, we tested the biosorption capacity of trimethyl chitosan (TMC)-ZnO nanocomposite (NC) for the adsorptive removal of <i>Escherichia coli</i> (<i>E. coli</i>) in aqueous suspension. For the formation of ZnO NPs, we followed the green synthesis route involving <i>Terminalia mantaly</i> (TM) aqueous leaf extract as a reducing agent, and the formed ZnO particles were surface-coated with TMC biopolymer. On testing of the physicochemical characteristics, the TM@ZnO/TMC (NC) hydrogel showed a random spherical morphology with an average size of 31.8 ± 2.6 nm and a crystal size of 28.0 ± 7.7 nm. The zeta potential of the composite was measured to be 23.5 mV with a BET surface area of 3.01 m<sup>2</sup> g<sup>−1</sup>. The spectral profiles of TM@ZnO/TMC NC hydrogel on interaction with <i>Escherichia coli</i> (<i>E. coli</i>) revealed some conformational changes to the functional groups assigned to the stretching vibrations of N-H, C-O-C, C-O ring, and C=O bonds. The adsorption kinetics of TM@ZnO/TMC NC hydrogel revealed the pseudo-second-order as the best fit mechanism for the <i>E. coli</i> biosorption. The surface homogeneity and monolayer adsorption of the TM@ZnO/TMC NC hydrogel reflects majorly the entire adsorption mechanism, observed to display the highest correlation for Jovanovic, Redlich–Peterson, and Langmuir’s isotherm models. Further, with the use of TM@ZnO/TMC NC hydrogel, we measured the highest adsorption capacity of <i>E. coli</i> to be 4.90 × 10 mg g<sup>−1</sup>, where an in-depth mechanistic pathway was proposed by making use of the FTIR analysis. |
| first_indexed | 2024-03-11T01:02:15Z |
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| institution | Directory Open Access Journal |
| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-11T01:02:15Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
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| series | Gels |
| spelling | doaj.art-056fe18336ac4a20aac0e0ed2316f4cb2023-11-18T19:28:15ZengMDPI AGGels2310-28612023-07-019758110.3390/gels9070581Biosorption of <i>Escherichia coli</i> Using ZnO-Trimethyl Chitosan Nanocomposite Hydrogel Formed by the Green Synthesis RouteIbrahim Birma Bwatanglang0Faruq Mohammad1John Nahadi Janet2Wasmia Mohammed Dahan3Hamad A. Al-Lohedan4Ahmed A. Soleiman5Department of Pure and Applied Chemistry, Adamawa State University, Mubi 650001, NigeriaDepartment of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Pure and Applied Chemistry, Adamawa State University, Mubi 650001, NigeriaDepartment of Pure and Applied Chemistry, Adamawa State University, Mubi 650001, NigeriaDepartment of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaCollege of Sciences and Engineering, Southern University, Baton Rouge, LA 70813, USAIn this study, we tested the biosorption capacity of trimethyl chitosan (TMC)-ZnO nanocomposite (NC) for the adsorptive removal of <i>Escherichia coli</i> (<i>E. coli</i>) in aqueous suspension. For the formation of ZnO NPs, we followed the green synthesis route involving <i>Terminalia mantaly</i> (TM) aqueous leaf extract as a reducing agent, and the formed ZnO particles were surface-coated with TMC biopolymer. On testing of the physicochemical characteristics, the TM@ZnO/TMC (NC) hydrogel showed a random spherical morphology with an average size of 31.8 ± 2.6 nm and a crystal size of 28.0 ± 7.7 nm. The zeta potential of the composite was measured to be 23.5 mV with a BET surface area of 3.01 m<sup>2</sup> g<sup>−1</sup>. The spectral profiles of TM@ZnO/TMC NC hydrogel on interaction with <i>Escherichia coli</i> (<i>E. coli</i>) revealed some conformational changes to the functional groups assigned to the stretching vibrations of N-H, C-O-C, C-O ring, and C=O bonds. The adsorption kinetics of TM@ZnO/TMC NC hydrogel revealed the pseudo-second-order as the best fit mechanism for the <i>E. coli</i> biosorption. The surface homogeneity and monolayer adsorption of the TM@ZnO/TMC NC hydrogel reflects majorly the entire adsorption mechanism, observed to display the highest correlation for Jovanovic, Redlich–Peterson, and Langmuir’s isotherm models. Further, with the use of TM@ZnO/TMC NC hydrogel, we measured the highest adsorption capacity of <i>E. coli</i> to be 4.90 × 10 mg g<sup>−1</sup>, where an in-depth mechanistic pathway was proposed by making use of the FTIR analysis.https://www.mdpi.com/2310-2861/9/7/581<i>Terminalia mantaly</i>zinc oxidetrimethyl chitosan<i>Escherichia coli</i>biosorptionLangmuir isotherm |
| spellingShingle | Ibrahim Birma Bwatanglang Faruq Mohammad John Nahadi Janet Wasmia Mohammed Dahan Hamad A. Al-Lohedan Ahmed A. Soleiman Biosorption of <i>Escherichia coli</i> Using ZnO-Trimethyl Chitosan Nanocomposite Hydrogel Formed by the Green Synthesis Route Gels <i>Terminalia mantaly</i> zinc oxide trimethyl chitosan <i>Escherichia coli</i> biosorption Langmuir isotherm |
| title | Biosorption of <i>Escherichia coli</i> Using ZnO-Trimethyl Chitosan Nanocomposite Hydrogel Formed by the Green Synthesis Route |
| title_full | Biosorption of <i>Escherichia coli</i> Using ZnO-Trimethyl Chitosan Nanocomposite Hydrogel Formed by the Green Synthesis Route |
| title_fullStr | Biosorption of <i>Escherichia coli</i> Using ZnO-Trimethyl Chitosan Nanocomposite Hydrogel Formed by the Green Synthesis Route |
| title_full_unstemmed | Biosorption of <i>Escherichia coli</i> Using ZnO-Trimethyl Chitosan Nanocomposite Hydrogel Formed by the Green Synthesis Route |
| title_short | Biosorption of <i>Escherichia coli</i> Using ZnO-Trimethyl Chitosan Nanocomposite Hydrogel Formed by the Green Synthesis Route |
| title_sort | biosorption of i escherichia coli i using zno trimethyl chitosan nanocomposite hydrogel formed by the green synthesis route |
| topic | <i>Terminalia mantaly</i> zinc oxide trimethyl chitosan <i>Escherichia coli</i> biosorption Langmuir isotherm |
| url | https://www.mdpi.com/2310-2861/9/7/581 |
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