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The Application Mn-Ni Ferrite Nanocomposite for Adsorption of Chromium from Textile Industrial Wastewater

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Abstract

The presence of chromium in the discharge of textile industrial effluents has become a major public and environmental health problem in developing countries including Ethiopia. Consequently, this research work aimed to investigate the adsorptive capacity of manganese ferrite and nickel ferrite (Mn-Ni ferrite) nanocomposite for chromium removal from textile industrial wastewater. Wastewater samples were collected from textile wastewater which is located at the Bole Lemi industrial park. The co-precipitation method was used to synthesize the Mn-Ni ferrite nanocomposite, and characterization was done using the techniques of FTIR, SEM, XRD, and BET surface area. The adsorptive performance of the nanocomposite was evaluated under the influence of contact time, adsorbent dose, pH, and initial chromium concentration which was supported by the response surface methodology. The BET surface area of Mn-Ni ferrite composites was found to be 60 m2/g, whereas the XRD and FTIR analyses showed the crystalline structure and presence of functional group peaks, respectively. This can create a fertile condition to illustrate the expected interaction mechanisms between the adsorbate and adsorbent. The maximum chromium removal from aqueous solution was found to be 87.7% at the contact time of 60 min, pH of 9, the adsorbent dosage of 0.5 g/100 mL, and initial chromium concentration of 200 mg/L, whereas the corresponding predicted chromium removal of 75.6% was recorded through a regression model. Similarly, the maximum chromium adsorption from textile wastewater was 84.5%. Among the adsorption isotherms, the Langmuir isotherm model was the best fit with the experimental data at R2 0.98 which implies the adsorption process was chemical sorption and monolayer. Finally, the nanocomposite adsorbent appears to be promising for the removal of chromium from textile industrial effluent on an industrial scale.

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Acknowledgements

We would like to thank the University of South Africa, the Institute for Nanotechnology and Water Sustainability, and Addis Ababa Science and Technology University for the support and provision of laboratory facilities.

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Conceptualization, Jemal Fito and Oudum Ebrahim; methodology, Jemal Fito, Oudum Ebrahim; software, Jemal Fito and Oudum Ebrahim; validation, Jemal Fito, Oudum Ebrahim, and Thabo Nkambule; formal analysis, Jemal Fito, and Thabo Nkambule; investigation, Oudum Ebrahim; data curation, Jemal Fito, and Thabo Nkambule; writing—original draft preparation, Jemal Fito, and Thabo Nkambule; writing—review and editing, Jemal Fito, and Thabo Nkambule; and; visualization and supervision, Jemal Fito, and Thabo Nkambule. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Jemal Fito.

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Fito, J., Ebrahim, O. & Nkambule, T.T.I. The Application Mn-Ni Ferrite Nanocomposite for Adsorption of Chromium from Textile Industrial Wastewater. Water Air Soil Pollut 234, 37 (2023). https://doi.org/10.1007/s11270-022-06058-x

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  • DOI: https://doi.org/10.1007/s11270-022-06058-x

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