Investigating the removal of Mn(II) from water and wastewater using low-cost bio-sorbents: Orange peels and sugarcane bagasse

Articles in Press

Document Type : Research Paper

Authors

1 Department of Chemical Sciences, Faculty of Science, University of Johannesburg, Johannesburg, South Africa.

2 Department of Chemical Sciences, Faculty of Science, University of Johannesburg, P.O. Box 524, Auckland Park 2006, Johannesburg, South Africa

Abstract

High contents of manganese (Mn) in portable water is a significant public health problem, thereby, becoming necessary to lower it to a level that is acceptable as mandated by regulatory agencies. This study was motivated by the need to evaluate the efficacy of low-cost and reusable bio-sorbents: orange peels (OPs) and sugarcane bagasse (SCB) for the attenuation of Mn(II) from simulated and real effluent. The solid: liquid ratio of 30 mg:100 mL was applied, and the results revealed that OPs were able to remove 96.71% of Mn(II) at an optimum contact period of 120 min while SCB was able to remove 94.74% of Mn(II) at an ideal contact period of 30 min. The pH study revealed the ideal removal efficiency (RE) at pH 5 for both OPs and SCB, while the optimum dosage was 100 mg for OPs and 50 mg for SCB. The study also found that SCB and OPs can be reused up to the third adsorption-desorption cycle, with their RE not changing significantly in those adsorption-desorption cycles. The bio-sorbents were characterized using Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) hyphenated to energy-dispersive spectroscopy (EDS), powder X-ray diffraction (PXRD), zeta potential analyzer and thermogravimetric analysis (TGA). The characterization results revealed a noticeable difference between pure and water-reacted bio-sorbents. From the findings of this study, the use of OPs and SCB could yield the desired result in Mn(II) removal from water.

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Advances in Environmental Technology

Articles in Press, Accepted Manuscript
Available Online from 19 October 2024

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History

  • Receive Date: 22 February 2024
  • Revise Date: 16 October 2024
  • Accept Date: 19 October 2024

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