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2024 Vol.29, Issue 6 Preview Page
Immobilization of Radionuclides (Co, Sr) in Soil using Pillared Clays and Phosphate-based Compounds

개질 점토와 인산염계 화합물을 이용한 토양 내 방사성 핵종(Co, Sr)의 고정화

Kyungchan Kang1
,
Won Sik Shin2*
강경찬 1
,
신원식 2*
1Offshore Plant Resources R&D Center, Korea Institute of Industrial Technology, 16, Mieumsandan 5-Ro 41Beon-Gil, Gangseo-Gu, Busan 46744, Republic of Korea
2School of Architecture, Civil, Environmental and Energy Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
1한국생산기술연구원해양플랜트기자재R&D센터
2경북대학교건설환경에너지공학부
*Corresponding Author
31 December 2024. pp. 154-167
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Abstract

Methods that induce the transformation of heavy metals into less soluble forms provide an important strategy for stabilizing heavy metals in soil and reducing their leaching potential. Immobilization of heavy metals in contaminated soils involves adding appropriate immobilizing agents to reduce the solubility and mobility of heavy metals, thereby preventing their leaching and diffusion. In this study, based on previous research, we evaluated the immobilization characteristics of cobalt and strontium by examining factors such as the injection amount, reaction time, and mixture of immobilizing agents, including Mn-PILC, Fe-PILC, fish bones, and diammonium phosphate (DAP) fertilizer. All immobilizing agents used in the experiment were found to partially immobilize cobalt and strontium based on their adsorption properties. The immobilization of cobalt and strontium by Mn-PILC and Fe-PILC occurred relatively quickly (within 2 days) and showed a continuous decrease over a period of 30 days. Generally phosphate-based compounds took a longer immobilization time than PILC. The evaluation of immobilization using a mixture of modified clay and phosphate showed that the mixture of modified clay and DAP resulted in the lowest leaching rates of cobalt (below 10%) and strontium (below 20%) according to the TCLP test. The results suggest that it can be utilized in the development of immobilizing agents for the stable immobilization of cobalt and strontium in soil environments.

Keywords
Immobilization
Cobalt
Strontium
PILC
Fishbone
References

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Information
  • Publisher :The Korean Society of Soil and Groundwater Environment
  • Publisher(Ko) :한국지하수토양환경학회
  • Journal Title :Journal of Soil and Groundwater Environment
  • Journal Title(Ko) :지하수토양환경
  • Volume : 29
  • No :6
  • Pages :154-167
  • Received Date : 2024-11-29
  • Revised Date : 2024-12-15
  • Accepted Date : 2024-12-26
  • DOI :https://doi.org/10.7857/JSGE.2024.29.6.154
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