Abstract
In this study, highly efficient fluoride removal of nano MgO was successfully synthesized using a simple hydrothermal precipitation method. Hexadecyl trimethyl ammonium bromide (CTMAB) was utilized as a surfactant. Its long-chain structure tightly wrapped around the precursor crystal of basic magnesium chloride, inhibiting the growth of precursor crystals, reducing their size, and improving crystal dispersion. This process enhanced the adsorption capacity of nano MgO for fluoride. The adsorption performance of nano MgO on fluoride was investigated. The results indicate that pseudo-second-order kinetics and the Langmuir isotherm model can describe the adsorption behavior for fluoride, with a maximum adsorption capacity of 122.47 mg/g. Methods such as XRD, SEM, XPS, and FTIR were employed to study the adsorption mechanisms of the adsorbent. Additionally, factors potentially affecting adsorption performance in practical applications, such as pH and competing ions, were examined. This study enhances our profound understanding of the defluorination effectiveness and mechanisms of nano MgO.
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Acknowledgements
This work was supported by Guangxi Minzu University School level Talent Introduction Scientific Research Initiation Project [2020KJQD17], General funded project of Guangxi Natural Science Foundation [2021GXNSFAA220075], Special Fund of Science and Technology of Nanning city [20221020] and Guangxi Bossco Environmental Protection Technology Co., Ltd Foundation [No.202100047]
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BoWen Liu planned and carried out the experimental work. Li Ai and HongFei Lin contributed to the analyzed and interpretation of results. Ming Lei provided the financial support for the project leading to this publication.
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Liu, B., Ai, L., Lei, M. et al. Efficient fluoride removal using nano MgO: mechanisms and performance evaluation. Environ Sci Pollut Res (2024). https://doi.org/10.1007/s11356-024-33083-6
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DOI: https://doi.org/10.1007/s11356-024-33083-6