Advances in environmental research

  • 제4권2호
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  • Pages.135-142
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  • 2015
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  • 2234-1722(pISSN)
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  • 2234-1730(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

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Adsorption/desorption of uranium on iron-bearing soil mineral surface

  • Ha, Seonjin (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Kyung, Daeseung (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Lee, Woojin (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST))
  • 투고 : 2015.04.28
  • 심사 : 2015.06.30
  • 발행 : 2015.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, we evaluated the adsorption/desorption of uranium (U) in pure soil environment using continuous column reactor. We additionally investigated the adsorption/desorption mechanism of U on vivianite surface in molecular scale using quantum calculation. We observed that below $0.1{\mu}M$ of U was detected after 20 d from U injection ($1{\mu}M$) in adsorption test. However, all of absorbed U was detached from vivianite surface in 24 h by injection of CARB solution ($1.44{\times}10^{-2}M\;NaHCO_3$ and $2.8{\times}10^{-3}M\;Na_2CO_3$). Based on exchange energy calculation, we found that $UO_2(CO_3)_2{^{2-}}$ and $UO_2(CO_3)_3{^{4-}}$ species have higher repulsive energy than $UO_2(OH)_2$ species. The results obtained from this study could be applied to predict the behavior of uranium in contaminated and remediation sites.

키워드

과제정보

연구 과제 주관 기관 : National Research Foundation of Korea (NRF)

참고문헌

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피인용 문헌

  1. The application of iron-based technologies in uranium remediation: A review vol.575, 2017, https://doi.org/10.1016/j.scitotenv.2016.09.211
  2. vol.121, pp.1755-1315, 2018, https://doi.org/10.1088/1755-1315/121/2/022014
  3. vol.121, pp.1755-1315, 2018, https://doi.org/10.1088/1755-1315/121/3/032043