Selective Immobilization of Antimony Using Brucite-rich Precipitate Produced during In Situ Hypochlorous Acid Formation through Seawater Electrolysis in a Nuclear Power Plant
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 mainl...
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MDPI AG
2020-08-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/17/4493 |
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| author | Kyung-Hee Lee Yong-Gu Lee Jaegwan Shin Kangmin Chon Sang-Ho Lee |
| author_facet | Kyung-Hee Lee Yong-Gu Lee Jaegwan Shin Kangmin Chon Sang-Ho Lee |
| author_sort | Kyung-Hee Lee |
| collection | DOAJ |
| description | 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)<sub>2</sub>). Therefore, brandholzite (Mg[Sb(OH)<sub>6</sub>]<sub>2</sub>·6H<sub>2</sub>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<sub>pzc</sub> = 9.6). The maximum adsorption capacity (Q<sub>max</sub>) 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. |
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| format | Article |
| id | doaj.art-d9c1232056bc4d77b5bee4690d599952 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T16:41:14Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-d9c1232056bc4d77b5bee4690d5999522023-11-20T12:04:11ZengMDPI AGEnergies1996-10732020-08-011317449310.3390/en13174493Selective Immobilization of Antimony Using Brucite-rich Precipitate Produced during In Situ Hypochlorous Acid Formation through Seawater Electrolysis in a Nuclear Power PlantKyung-Hee Lee0Yong-Gu Lee1Jaegwan Shin2Kangmin Chon3Sang-Ho Lee4Korea Hydro & Nuclear Power (KHNP) Central Research Institute, 70, 1312-gil, Yuseong-daero, Yuseong-gu, Daejeon 34101, KoreaDepartment of Environmental Engineering, College of Engineering, Kangwon National University, Kangwondaehak-gil 1, Chuncheon-si, Gangwon-do 24341, KoreaDepartment of Environmental Engineering, College of Engineering, Kangwon National University, Kangwondaehak-gil 1, Chuncheon-si, Gangwon-do 24341, KoreaDepartment of Environmental Engineering, College of Engineering, Kangwon National University, Kangwondaehak-gil 1, Chuncheon-si, Gangwon-do 24341, KoreaKorea Hydro & Nuclear Power (KHNP) Central Research Institute, 70, 1312-gil, Yuseong-daero, Yuseong-gu, Daejeon 34101, KoreaThis 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)<sub>2</sub>). Therefore, brandholzite (Mg[Sb(OH)<sub>6</sub>]<sub>2</sub>·6H<sub>2</sub>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<sub>pzc</sub> = 9.6). The maximum adsorption capacity (Q<sub>max</sub>) 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.https://www.mdpi.com/1996-1073/13/17/4493antimonybrucitebrandholzite-like structureadsorption |
| spellingShingle | Kyung-Hee Lee Yong-Gu Lee Jaegwan Shin Kangmin Chon Sang-Ho Lee Selective Immobilization of Antimony Using Brucite-rich Precipitate Produced during In Situ Hypochlorous Acid Formation through Seawater Electrolysis in a Nuclear Power Plant Energies antimony brucite brandholzite-like structure adsorption |
| title | Selective Immobilization of Antimony Using Brucite-rich Precipitate Produced during In Situ Hypochlorous Acid Formation through Seawater Electrolysis in a Nuclear Power Plant |
| title_full | Selective Immobilization of Antimony Using Brucite-rich Precipitate Produced during In Situ Hypochlorous Acid Formation through Seawater Electrolysis in a Nuclear Power Plant |
| title_fullStr | Selective Immobilization of Antimony Using Brucite-rich Precipitate Produced during In Situ Hypochlorous Acid Formation through Seawater Electrolysis in a Nuclear Power Plant |
| title_full_unstemmed | Selective Immobilization of Antimony Using Brucite-rich Precipitate Produced during In Situ Hypochlorous Acid Formation through Seawater Electrolysis in a Nuclear Power Plant |
| title_short | Selective Immobilization of Antimony Using Brucite-rich Precipitate Produced during In Situ Hypochlorous Acid Formation through Seawater Electrolysis in a Nuclear Power Plant |
| title_sort | selective immobilization of antimony using brucite rich precipitate produced during in situ hypochlorous acid formation through seawater electrolysis in a nuclear power plant |
| topic | antimony brucite brandholzite-like structure adsorption |
| url | https://www.mdpi.com/1996-1073/13/17/4493 |
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