Optimizing Cr(VI) adsorption parameters on magnetite (Fe3O4) and manganese doped magnetite (MnxFe(3-x)O4) nanoparticles
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Linda Ouma
,
Agnes Pholosi
Abstract
Magnetite as an adsorbent is efficient since iron oxides have high affinities for heavy metal pollutants and are environmentally friendly. Manganese oxides provide catalytic properties which are desirable during the remediation of multi valent pollutants. Magnetite (Fe3O4) and manganese doped magnetite (MnxFe(3-x)O4) nanoparticles were synthesized and characterized to determine the manganese doping effects on magnetite’s crystal and surface properties. Fe3O4 and MnxFe(3-x)O4 showed similarities in crystal morphology indicating that manganese doping did not alter the nature of Fe3O4 nanoparticles. Manganese doping improved magnetite’s thermal properties as well as its surface area providing improved adsorption characteristics. The as-synthesized particles were applied in the optimization of hexavalent chromium adsorption. Adsorption proceeded under similar conditions for both adsorbents indicating their structural similarities. Higher efficiencies were observed on the doped adsorbent due to increased surface area and the presence of additional functional groups. Solution pH significantly affected the adsorption process aiding in the reduction of Cr(VI) ions to the less toxic Cr(III) species. The adsorption distribution coefficient KD indicated that manganese doping significantly improved magnetite’s affinity for hexavalent chromium. Adsorption and reduction were determined to responsible for pollutant reduction in solution at optimal conditions of pH 2, 5 g/L and 100 mg/L for adsorbent mass and solution concentration.
Funding source: National Research Foundation
Acknowledgements
The authors acknowledge financial support from South Africa’s National Research Foundation (NRF).
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: National Research Foundation.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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© 2022 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Reviews
- Anticancer properties of arylchromenes and arylchromans: an overview
- Solid state lithium ion conductors for lithium batteries
- Performance and kinetics of a fluidized bed anaerobic reactor treating distillery effluent
- Use of biochemical markers for diabetes prevention in the new decade
- Antibreast cancer activities of phytochemicals from Anonna muricata using computer-aided drug design (CADD) approach
- Alkaline-earth metal(II) complexes of salinomycin – spectral properties and antibacterial activity
- Use of heterogeneous catalysis in sustainable biofuel production
- Antibacterial, antioxidant and cytotoxic activities of the stem bark of Archidendron jiringa (Jack) I.C. Nielsen
- A review of sludge production in South Africa municipal wastewater treatment plants, analysis of handling cost and potential minimization methods
- Cu-Catalysed tandem reactions for building poly hetero atom heterocycles-green chemistry tool
- Optimizing Cr(VI) adsorption parameters on magnetite (Fe3O4) and manganese doped magnetite (MnxFe(3-x)O4) nanoparticles
- Fabaceae: a significant flavonoid source for plant and human health
- A novel application of synthesised based squarylium dyes on nylon 6, and silk woven fabrics
- Chromatographic characterization of the fusion protein SARS-CoV-2 S protein (RBD)-hFc
- Ethnopharmacology, phytochemistry and a new chemotaxonomic marker in Oldenlandia affinis (Roem. & Schult.) DC. Rubiaceae
- Extraction, isolation and characterization of secondary metabolites in the leaves of Morinda lucida from Oshiegbe in Ebonyi State
- Lead optimisation efforts on a molecular prototype of the immunomodulatory parasitic protein ES-62
- Catalytic applications of graphene oxide towards the synthesis of bioactive scaffolds through the formation of carbon–carbon and carbon–heteroatom bonds
- Synthesis, characterization, DFT and molecular docking studies of acetone O-((2,5-dichlorophenyl)sulfonyl) oxime
- Design of membrane systems
- Conceptual design and cost-efficient environmentally Benign synthesis of beta-lactams
- Synthesis and characterization of alkaloid derived hydrazones and their metal (II) complexes
- The spontaneity of chemical reactions: challenges with handling the concept and its implications
- Copper nanoparticles catalyzed carbon–heteroatom bond formation and synthesis of related heterocycles by greener procedures
- Tellurium in carbohydrate synthesis
- Conformational preferences and intramolecular hydrogen bonding patterns of tetraflavaspidic acid BBBB – a tetrameric acylphloroglucinol
- Phytochemical and antioxidant studies of Hibiscus Cannabinus seed oil
- Polyaniline mediated heterogeneous catalysis in the preparation of heterocyclic derivatives through carbon–heteroatom bond formations
- A comparison of two digestion methods and heavy metals determination in sediments
- Synthesis, properties and catalysis of quantum dots in C–C and C-heteroatom bond formations
- Recyclable magnetically retrievable nanocatalysts for C–heteroatom bond formation reactions
- Small molecules as next generation biofilm inhibitors and anti-infective agents
- Toxicity of tellurium and its compounds
- Biodegradable polycaprolactone (PCL) based polymer and composites
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Articles in the same Issue
- Frontmatter
- Reviews
- Anticancer properties of arylchromenes and arylchromans: an overview
- Solid state lithium ion conductors for lithium batteries
- Performance and kinetics of a fluidized bed anaerobic reactor treating distillery effluent
- Use of biochemical markers for diabetes prevention in the new decade
- Antibreast cancer activities of phytochemicals from Anonna muricata using computer-aided drug design (CADD) approach
- Alkaline-earth metal(II) complexes of salinomycin – spectral properties and antibacterial activity
- Use of heterogeneous catalysis in sustainable biofuel production
- Antibacterial, antioxidant and cytotoxic activities of the stem bark of Archidendron jiringa (Jack) I.C. Nielsen
- A review of sludge production in South Africa municipal wastewater treatment plants, analysis of handling cost and potential minimization methods
- Cu-Catalysed tandem reactions for building poly hetero atom heterocycles-green chemistry tool
- Optimizing Cr(VI) adsorption parameters on magnetite (Fe3O4) and manganese doped magnetite (MnxFe(3-x)O4) nanoparticles
- Fabaceae: a significant flavonoid source for plant and human health
- A novel application of synthesised based squarylium dyes on nylon 6, and silk woven fabrics
- Chromatographic characterization of the fusion protein SARS-CoV-2 S protein (RBD)-hFc
- Ethnopharmacology, phytochemistry and a new chemotaxonomic marker in Oldenlandia affinis (Roem. & Schult.) DC. Rubiaceae
- Extraction, isolation and characterization of secondary metabolites in the leaves of Morinda lucida from Oshiegbe in Ebonyi State
- Lead optimisation efforts on a molecular prototype of the immunomodulatory parasitic protein ES-62
- Catalytic applications of graphene oxide towards the synthesis of bioactive scaffolds through the formation of carbon–carbon and carbon–heteroatom bonds
- Synthesis, characterization, DFT and molecular docking studies of acetone O-((2,5-dichlorophenyl)sulfonyl) oxime
- Design of membrane systems
- Conceptual design and cost-efficient environmentally Benign synthesis of beta-lactams
- Synthesis and characterization of alkaloid derived hydrazones and their metal (II) complexes
- The spontaneity of chemical reactions: challenges with handling the concept and its implications
- Copper nanoparticles catalyzed carbon–heteroatom bond formation and synthesis of related heterocycles by greener procedures
- Tellurium in carbohydrate synthesis
- Conformational preferences and intramolecular hydrogen bonding patterns of tetraflavaspidic acid BBBB – a tetrameric acylphloroglucinol
- Phytochemical and antioxidant studies of Hibiscus Cannabinus seed oil
- Polyaniline mediated heterogeneous catalysis in the preparation of heterocyclic derivatives through carbon–heteroatom bond formations
- A comparison of two digestion methods and heavy metals determination in sediments
- Synthesis, properties and catalysis of quantum dots in C–C and C-heteroatom bond formations
- Recyclable magnetically retrievable nanocatalysts for C–heteroatom bond formation reactions
- Small molecules as next generation biofilm inhibitors and anti-infective agents
- Toxicity of tellurium and its compounds
- Biodegradable polycaprolactone (PCL) based polymer and composites
- Quality of poultry meat- the practical issues and knowledge based solutions
