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Selective Immobilization of Antimony Using Brucite-rich Precipitate Produced during In Situ Hypochlorous Acid Formation through Seawater Electrolysis in a Nuclear Power Plant

Author

Listed:
  • Kyung-Hee Lee

    (Korea Hydro & Nuclear Power (KHNP) Central Research Institute, 70, 1312-gil, Yuseong-daero, Yuseong-gu, Daejeon 34101, Korea)

  • Yong-Gu Lee

    (Department of Environmental Engineering, College of Engineering, Kangwon National University, Kangwondaehak-gil 1, Chuncheon-si, Gangwon-do 24341, Korea)

  • Jaegwan Shin

    (Department of Environmental Engineering, College of Engineering, Kangwon National University, Kangwondaehak-gil 1, Chuncheon-si, Gangwon-do 24341, Korea)

  • Kangmin Chon

    (Department of Environmental Engineering, College of Engineering, Kangwon National University, Kangwondaehak-gil 1, Chuncheon-si, Gangwon-do 24341, Korea)

  • Sang-Ho Lee

    (Korea Hydro & Nuclear Power (KHNP) Central Research Institute, 70, 1312-gil, Yuseong-daero, Yuseong-gu, Daejeon 34101, Korea)

Abstract

This study has investigated the selective immobilization of antimony using the brucite (magnesium hydroxide)-rich precipitate (BP) collected from a hypochlorous storage tank in a nuclear power plant of South Korea. The energy dispersive X-ray and X-ray diffraction analyses revealed that the BP mainly consisted of magnesium (72.5%) and its dominant mineral phase was brucite (Mg(OH) 2 ). Therefore, brandholzite (Mg[Sb(OH) 6 ] 2 ·6H 2 O) was newly formed through the surface-induced precipitation during the adsorption of antimony using the BP. The adsorbed amount of antimony increased with decreasing pH values because of the increased positive surface charge of the BP (pH pzc = 9.6). The maximum adsorption capacity (Q max ) of BP, calculated by Langmuir adsorption isotherm, was 11.02 mg/g. The presence of competitive anions did not significantly affect the adsorption of antimony toward the BP due to its high selectivity. These results suggest that the facile utilization of the BP as a low-cost adsorbent seems to be a practical option for the selective removal of antimony from wastewater.

Suggested Citation

  • Kyung-Hee Lee & Yong-Gu Lee & Jaegwan Shin & Kangmin Chon & Sang-Ho Lee, 2020. "Selective Immobilization of Antimony Using Brucite-rich Precipitate Produced during In Situ Hypochlorous Acid Formation through Seawater Electrolysis in a Nuclear Power Plant," Energies, MDPI, vol. 13(17), pages 1-11, August.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:17:p:4493-:d:406836
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    Cited by:

    1. Yong-Gu Lee & Jaegwan Shin & Jinwoo Kwak & Sangwon Kim & Changgil Son & Kyung Hwa Cho & Kangmin Chon, 2021. "Effects of NaOH Activation on Adsorptive Removal of Herbicides by Biochars Prepared from Ground Coffee Residues," Energies, MDPI, vol. 14(5), pages 1-15, February.

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