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A Novel and Efficient Metal Oxide Fluoride Absorbent for Drinking Water Safety and Sustainable Development

Author

Listed:
  • Changjuan Dong

    (State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
    College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China)

  • Xiaomei Wu

    (State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China)

  • Zhanyi Gao

    (State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China)

  • Peiling Yang

    (College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China)

  • Mohd Yawar Ali Khan

    (Department of Hydrogeology, King Abdulaziz University, Jeddah 21589, Saudi Arabia)

Abstract

Inefficient and non-environmentally friendly absorbent production can lead to much resource waste and go against low carbon and sustainable development. A novel and efficient Mg-Fe-Ce (MFC) complex metal oxide absorbent of fluoride ion (F − ) removal was proposed for safe, environmentally friendly, and sustainable drinking water management. A series of optimization and preparation processes for the adsorbent and batch experiments (e.g., effects of solution pH, adsorption kinetics, adsorption isotherms, effects of coexisting anions, as well as surface properties tests) were carried out to analyze the characteristics of the adsorbent. The results indicated that optimum removal of F − occurred in a pH range of 4–5.5, and higher adsorption performances also happened under neutral pH conditions. The kinetic data under 10 and 50 mg·g −1 were found to be suitable for the pseudo-second-order adsorption rate model, and the two-site Langmuir model was ideal for adsorption isotherm data as compared to the one-site Langmuir model. According to the two-site Langmuir model, the maximum adsorption capacity calculated at pH 7.0 ± 0.2 was 204 mg·g −1 . The adsorption of F − was not affected by the presence of sulfate (SO 4 2− ), nitrate (NO 3 − ), and chloride (Cl − ), which was suitable for practical applications in drinking water with high F − concentration. The MFC adsorbent has an amorphous structure, and there was an exchange reaction between OH − and F − . The novel MFC adsorbent was proven to have higher efficiency, better economy, and environmental sustainability, and be more environmentally friendly.

Suggested Citation

  • Changjuan Dong & Xiaomei Wu & Zhanyi Gao & Peiling Yang & Mohd Yawar Ali Khan, 2021. "A Novel and Efficient Metal Oxide Fluoride Absorbent for Drinking Water Safety and Sustainable Development," Sustainability, MDPI, vol. 13(2), pages 1-18, January.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:2:p:883-:d:481795
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    References listed on IDEAS

    as
    1. Valdas Rudelis & Tadas Dambrauskas & Agne Grineviciene & Kestutis Baltakys, 2019. "The Prospective Approach for the Reduction of Fluoride Ions Mobility in Industrial Waste by Creating Products of Commercial Value," Sustainability, MDPI, vol. 11(3), pages 1-18, January.
    2. Janeth Marwa & Mesia Lufingo & Chicgoua Noubactep & Revocatus Machunda, 2018. "Defeating Fluorosis in the East African Rift Valley: Transforming the Kilimanjaro into a Rainwater Harvesting Park," Sustainability, MDPI, vol. 10(11), pages 1-12, November.
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