Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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A New Approach on Adsorption and Transport of Cesium in Organic Matter-rich Soil and Groundwater Environments Changed by Wildfires

산불로 인해 변화하는 토양지하수 환경에서의 세슘 흡착 및 거동에 대한 새로운 고찰

  • Bae, Hyojin (Research Center for Geochronology and Isotope Analysis, Korea Basic Science Institute) ;
  • Choung, Sungwook (Research Center for Geochronology and Isotope Analysis, Korea Basic Science Institute) ;
  • Jeong, Jina (Department of Geology, Kyungpook National University)
  • 배효진 (한국기초과학지원연구원 환경분석연구부) ;
  • 정성욱 (한국기초과학지원연구원 환경분석연구부) ;
  • 정진아 (경북대학교 지질학과)
  • Received : 2021.11.18
  • Accepted : 2022.01.11
  • Published : 2022.01.30
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Abstract

This study was conducted to investigate the effect of soil and groundwater environment changed by wildfire on cesium adsorption and transport. Soil samples (A, B) used in the study were collected from Gangwon-do, where wildfires frequently occur, and the adsorption and transport of cesium in the samples were evaluated through batch and column experiments. As a result of the batch adsorption experiments with various concentrations of cesium (CW ≈ 10~105 ㎍/L), the adsorption distribution coefficient (Kd) of cesium was higher in sample A for all observed concentrations. It means that the adsorption capacity of sample A was higher to that of sample B, which was also confirmed through the parameters of adsorption isotherm models (Freundlich and Langmuir model) applied to the experimental results. The fixed bed column experiments simulated the actual soil and groundwater environment, and they showed that cesium was retarded approximately 43 and 27 times than a nonreactive tracer in sample A and B, respectively. In particular, a significant retardation occurred in the sample A. Although sample A contains little clays, total organic carbon (TOC) contents were 3 times greater than sample B. These results imply that particulate organic matter caused by wildfire might influence the adsorption and transport of cesium in the organic matter-rich soil and groundwater environment.

Keywords

Acknowledgement

본 연구는 정부의 재원으로 한국연구재단의 지원을 받아 수행되었습니다(NRF-2019R1A2C1004891).

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