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3D flower-like zirconium magnesium oxide nanocomposite for efficient fluoride removal

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Abstract

A 3D flower-shaped bimetallic nanocomposite zirconium magnesium oxide (ZMO) was prepared first time by the controlled solution combustion method using triethanolamine (TEA) as a fuel and chelating agent. The composite material was used to remove excess fluoride via adsorption. The thermal stability of the adsorbent was characterized by thermogravimetric analysis (TGA). Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray (EDX), and X-ray diffraction (XRD) were used to characterize the adsorbent. The surface charge of the nano adsorbent was determined by Zeta Sizer. The surface area and pore volume of the adsorbent were determined by Brunauer–Emmett–Teller (BET) isotherm and Barrett-Joyner-Halenda (BJH) methods. The adsorption behavior of fluoride was studied systematically varying the pH, contact time, adsorbent dose, and initial fluoride concentration. The adsorption followed the Langmuir isotherm model with a maximum adsorption capacity of 42.14 mg/g. The pseudo-second-order kinetic model was confirmed by the adsorption study. The maximum adsorption efficiency was in the 6–10 pH range. The reaction mechanism was mainly based on ion exchange between hydroxy and fluoride ions which was proven by X-ray photoelectron spectroscopy (XPS). Real water tests indicated that ZMO could be used as a potential defluoridation agent for fluoride containing groundwater treatment.

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Funding

The authors are grateful to the Department of Science and Technology (DST) for its financial support (DST STI HUB Project Sanction letter No – SEED/TITE/2019/84) and DST FIST, Govt. of India via Project Sanction Letter No. SR/FST/CS-I/2022/247 dated December 19, 2022, for infrastructural support.

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Supriya Mandal and Bholanath Panda contributed to the study conception, design, material preparation, data collection, and analysis. Debasish Mondal performed the SEM analysis. Julekha Khatun performed the XPS analysis. Prasanta Dhak performs the XRD analysis. The concept and overall supervising of the work as well as preparing the manuscript were carried out by Dr. Debasis Dhak. All authors read and approved the final manuscript.”

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Correspondence to Debasis Dhak.

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Both the authors contributed equally and both are to be treated as first authors.

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Mandal, S., Panda, B., Mondal, D. et al. 3D flower-like zirconium magnesium oxide nanocomposite for efficient fluoride removal. Environ Sci Pollut Res 30, 119491–119505 (2023). https://doi.org/10.1007/s11356-023-30704-4

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  • DOI: https://doi.org/10.1007/s11356-023-30704-4

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