Preparation, characterization and application of polymeric ultra-permeable biodegradable ferromagnetic nanocomposite adsorbent for removal of Cr(VI) from synthetic wastewater: kinetics, isotherms and thermodynamics
Hexavalent chromium (Cr(VI)) contamination in drinking water due to industrial activities is a growing worldwide concern. Cr(VI) concentrations exceeding a few parts per billion (ppb) can cause serious health problems such as asthma, blood cancer, kidney-related diseases, liver and spleen damage, as...
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Frontiers Media S.A.
2024-10-01
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| Series: | Frontiers in Environmental Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenvc.2024.1451262/full |
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| author | Evans Suter Hilary Rutto Robert Makomere Musamba Banza Tumisang Seodigeng Sammy Kiambi Wesley Omwoyo |
| author_facet | Evans Suter Hilary Rutto Robert Makomere Musamba Banza Tumisang Seodigeng Sammy Kiambi Wesley Omwoyo |
| author_sort | Evans Suter |
| collection | DOAJ |
| description | Hexavalent chromium (Cr(VI)) contamination in drinking water due to industrial activities is a growing worldwide concern. Cr(VI) concentrations exceeding a few parts per billion (ppb) can cause serious health problems such as asthma, blood cancer, kidney-related diseases, liver and spleen damage, as well as neurological system, immunological deficiencies, and reproductive issues. This study, thus, explored the feasibility of employing a novel polymeric ferromagnetic nanocomposite adsorbent made of low-cost, biodegradable, and ultra-permeable materials from pulp and paper sludge for adsorptive removal of hexavalent chromium (Cr6+) from synthetic wastewater. Vibrating-sample magnetometer (VSM), X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmet-Teller surface area (BET), and Fourier transform infrared (FTIR) were used to analyze the produced nanocomposite adsorbent. The Fourier transform infrared results confirmed the presence of adsorptive peaks attributed to −OH, −NH2, and FeO. Scanning electron microscopy micrographs revealed a porous adsorbent surface. XRD revealed the existence of the crystalline spinel-structured magnetite (Fe3O4) phase of iron oxide, while the saturation magnetization was established to be 26.90 emu/g. The Brunauer–Emmett–Teller analysis confirmed a slight decrease in the surface area of the nanocomposite adsorbent to 6.693 m2.g−1, compared to Fe3O4 (7.591 m2.g−1). The optimum conditions for Cr6+ removal were pH 2.0, 1.0 g/L adsorbent dose, room temperature (25°C), 120 min contact time, and 20 mg/L pollutant concentration. During removal, the Cr(VI) was adsorbed by electrostatic attraction and/or reduced to trivalent chromium Cr(III). At low starting Cr(VI) concentrations, chemisorption dominated the removal process, but as concentrations increased, physisorption became more significant. The prepared nanocomposite adsorbent presented exceptional removal efficiency of up to 92.23%, indicating that it may be useful for the adsorption of metal ions from industrial and household wastewater. |
| format | Article |
| id | doaj-art-9ca95d5a921848b5be4f505d3f56c6b0 |
| institution | OA Journals |
| issn | 2673-4486 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Environmental Chemistry |
| spelling | doaj-art-9ca95d5a921848b5be4f505d3f56c6b02025-08-20T02:09:51ZengFrontiers Media S.A.Frontiers in Environmental Chemistry2673-44862024-10-01510.3389/fenvc.2024.14512621451262Preparation, characterization and application of polymeric ultra-permeable biodegradable ferromagnetic nanocomposite adsorbent for removal of Cr(VI) from synthetic wastewater: kinetics, isotherms and thermodynamicsEvans Suter0Hilary Rutto1Robert Makomere2Musamba Banza3Tumisang Seodigeng4Sammy Kiambi5Wesley Omwoyo6Department of Chemical Engineering and Metallurgy, Clean Technology and Applied Materials Research Group, Vaal University of Technology, Vanderbijlpark, South AfricaDepartment of Chemical Engineering and Metallurgy, Clean Technology and Applied Materials Research Group, Vaal University of Technology, Vanderbijlpark, South AfricaDepartment of Chemical Engineering and Metallurgy, Clean Technology and Applied Materials Research Group, Vaal University of Technology, Vanderbijlpark, South AfricaDepartment of Chemical Engineering and Metallurgy, Clean Technology and Applied Materials Research Group, Vaal University of Technology, Vanderbijlpark, South AfricaDepartment of Chemical Engineering and Metallurgy, Clean Technology and Applied Materials Research Group, Vaal University of Technology, Vanderbijlpark, South AfricaDepartment of Chemical Engineering and Metallurgy, Clean Technology and Applied Materials Research Group, Vaal University of Technology, Vanderbijlpark, South AfricaBiotechnology and Chemistry Department, Vaal University of Technology, Vanderbijlpark, South AfricaHexavalent chromium (Cr(VI)) contamination in drinking water due to industrial activities is a growing worldwide concern. Cr(VI) concentrations exceeding a few parts per billion (ppb) can cause serious health problems such as asthma, blood cancer, kidney-related diseases, liver and spleen damage, as well as neurological system, immunological deficiencies, and reproductive issues. This study, thus, explored the feasibility of employing a novel polymeric ferromagnetic nanocomposite adsorbent made of low-cost, biodegradable, and ultra-permeable materials from pulp and paper sludge for adsorptive removal of hexavalent chromium (Cr6+) from synthetic wastewater. Vibrating-sample magnetometer (VSM), X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmet-Teller surface area (BET), and Fourier transform infrared (FTIR) were used to analyze the produced nanocomposite adsorbent. The Fourier transform infrared results confirmed the presence of adsorptive peaks attributed to −OH, −NH2, and FeO. Scanning electron microscopy micrographs revealed a porous adsorbent surface. XRD revealed the existence of the crystalline spinel-structured magnetite (Fe3O4) phase of iron oxide, while the saturation magnetization was established to be 26.90 emu/g. The Brunauer–Emmett–Teller analysis confirmed a slight decrease in the surface area of the nanocomposite adsorbent to 6.693 m2.g−1, compared to Fe3O4 (7.591 m2.g−1). The optimum conditions for Cr6+ removal were pH 2.0, 1.0 g/L adsorbent dose, room temperature (25°C), 120 min contact time, and 20 mg/L pollutant concentration. During removal, the Cr(VI) was adsorbed by electrostatic attraction and/or reduced to trivalent chromium Cr(III). At low starting Cr(VI) concentrations, chemisorption dominated the removal process, but as concentrations increased, physisorption became more significant. The prepared nanocomposite adsorbent presented exceptional removal efficiency of up to 92.23%, indicating that it may be useful for the adsorption of metal ions from industrial and household wastewater.https://www.frontiersin.org/articles/10.3389/fenvc.2024.1451262/fulladsorptionnanocomposite adsorbentchromium (VI)equilibrium studiesco-existing ionswastewater treatment |
| spellingShingle | Evans Suter Hilary Rutto Robert Makomere Musamba Banza Tumisang Seodigeng Sammy Kiambi Wesley Omwoyo Preparation, characterization and application of polymeric ultra-permeable biodegradable ferromagnetic nanocomposite adsorbent for removal of Cr(VI) from synthetic wastewater: kinetics, isotherms and thermodynamics Frontiers in Environmental Chemistry adsorption nanocomposite adsorbent chromium (VI) equilibrium studies co-existing ions wastewater treatment |
| title | Preparation, characterization and application of polymeric ultra-permeable biodegradable ferromagnetic nanocomposite adsorbent for removal of Cr(VI) from synthetic wastewater: kinetics, isotherms and thermodynamics |
| title_full | Preparation, characterization and application of polymeric ultra-permeable biodegradable ferromagnetic nanocomposite adsorbent for removal of Cr(VI) from synthetic wastewater: kinetics, isotherms and thermodynamics |
| title_fullStr | Preparation, characterization and application of polymeric ultra-permeable biodegradable ferromagnetic nanocomposite adsorbent for removal of Cr(VI) from synthetic wastewater: kinetics, isotherms and thermodynamics |
| title_full_unstemmed | Preparation, characterization and application of polymeric ultra-permeable biodegradable ferromagnetic nanocomposite adsorbent for removal of Cr(VI) from synthetic wastewater: kinetics, isotherms and thermodynamics |
| title_short | Preparation, characterization and application of polymeric ultra-permeable biodegradable ferromagnetic nanocomposite adsorbent for removal of Cr(VI) from synthetic wastewater: kinetics, isotherms and thermodynamics |
| title_sort | preparation characterization and application of polymeric ultra permeable biodegradable ferromagnetic nanocomposite adsorbent for removal of cr vi from synthetic wastewater kinetics isotherms and thermodynamics |
| topic | adsorption nanocomposite adsorbent chromium (VI) equilibrium studies co-existing ions wastewater treatment |
| url | https://www.frontiersin.org/articles/10.3389/fenvc.2024.1451262/full |
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