Original Article

Econ. Environ. Geol. 2018; 51(2): 77-85

Published online April 30, 2018

https://doi.org/10.9719/EEG.2018.51.2.77

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Biogeochemical Effects of Hydrogen Gas on the Behaviors of Adsorption and Precipitation of Groundwater-Dissolved Uranium

Seung Yeop Lee*, Jae Kwang Lee, Hyo-Jin Seo and Min Hoon Baik

Korea Atomic Energy Research Institute, Daedeok-daero, Yuseong-gu, Daejeon

Correspondence to : seungylee@kaeri.re.kr

Received: March 26, 2018; Revised: April 4, 2018; Accepted: April 5, 2018

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided original work is properly cited.

Abstract

There would be a possibility of uranium contamination around the nuclear power plants and the underground waste disposal sites, where the uranium could further migrate and diffuse to some distant places by groundwater. It is necessary to understand the biogeochemical behaviors of uranium in underground environments to effectively control the migration and diffusion of uranium. In general, various kinds of microbes are living in soils and geological media where the activity of microbes may be closely connected with the redox reaction of nuclides resulting in the changes of their solubility. We investigated the adsorption and precipitation behaviors of dissolved uranium on some solid materials using hydrogen gas as an electron donor instead of organic matters. Although the effect of hydrogen gas did not appear in a batch experiment that used granite as a solid material, there occurred a reduction of uranium concentration by 5~8% due to hydrogen in an experiment using bentonite. This result indicates that some indigenous bacteria in the bentonite that have utilized hydrogen as the electron donor affected the behavior (reduction) of uranium. In addition, the bentonite bacteria have showed their strong tolerance against a given high temperature and radioactivity of a specific waste environment, suggesting that the nuclear-biogeochemical reaction may be one of main mechanisms if the natural bentonite is used as a buffer material for the disposal site in the future.

Keywords uranium, biogeochemical, microbes, hydrogen gas, bentonite

지하수 용존 우라늄의 수착 및 침전 거동에서 수소 가스의 생지화학적 영향

이승엽* · 이재광 ·서효진 · 백민훈

한국원자력연구원 방사성폐기물처분연구부

요 약

Article

Original Article

Econ. Environ. Geol. 2018; 51(2): 77-85

Published online April 30, 2018 https://doi.org/10.9719/EEG.2018.51.2.77

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Biogeochemical Effects of Hydrogen Gas on the Behaviors of Adsorption and Precipitation of Groundwater-Dissolved Uranium

Seung Yeop Lee*, Jae Kwang Lee, Hyo-Jin Seo and Min Hoon Baik

Korea Atomic Energy Research Institute, Daedeok-daero, Yuseong-gu, Daejeon

Correspondence to:seungylee@kaeri.re.kr

Received: March 26, 2018; Revised: April 4, 2018; Accepted: April 5, 2018

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided original work is properly cited.

Abstract

There would be a possibility of uranium contamination around the nuclear power plants and the underground waste disposal sites, where the uranium could further migrate and diffuse to some distant places by groundwater. It is necessary to understand the biogeochemical behaviors of uranium in underground environments to effectively control the migration and diffusion of uranium. In general, various kinds of microbes are living in soils and geological media where the activity of microbes may be closely connected with the redox reaction of nuclides resulting in the changes of their solubility. We investigated the adsorption and precipitation behaviors of dissolved uranium on some solid materials using hydrogen gas as an electron donor instead of organic matters. Although the effect of hydrogen gas did not appear in a batch experiment that used granite as a solid material, there occurred a reduction of uranium concentration by 5~8% due to hydrogen in an experiment using bentonite. This result indicates that some indigenous bacteria in the bentonite that have utilized hydrogen as the electron donor affected the behavior (reduction) of uranium. In addition, the bentonite bacteria have showed their strong tolerance against a given high temperature and radioactivity of a specific waste environment, suggesting that the nuclear-biogeochemical reaction may be one of main mechanisms if the natural bentonite is used as a buffer material for the disposal site in the future.

Keywords uranium, biogeochemical, microbes, hydrogen gas, bentonite

지하수 용존 우라늄의 수착 및 침전 거동에서 수소 가스의 생지화학적 영향

이승엽* · 이재광 ·서효진 · 백민훈

한국원자력연구원 방사성폐기물처분연구부

Received: March 26, 2018; Revised: April 4, 2018; Accepted: April 5, 2018

요 약

    KSEEG
    Apr 30, 2024 Vol.57 No.2, pp. 107~280

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