Earticle

초록

영어

Background: The objective of this study is to investigate the suitability of moss and lichen as bioindicators that can substitute for existing bioindicators, such as mugwort and pine needles. Materials and Methods: Fifteen moss (Hypnaceae) and lichen (Parmeliaceae) samples were collected from three differing ecological environments in Korea: a high-altitude mountainous region; a high-humidity coastal area; and an urban community park. The samples were collected from tree trunks, rocks, and soil substrates and were dried, ground, sieved, ashed, and enclosed in polyethylene containers for activity concentration measurements via gamma spectrometry. The reference date for decay correction was based on sampling dates and measured activity. Results and Discussion: The activity concentrations of 137Cs, 40K, and 7Be in mosses by dry weight were 1.89–47.8, 156–506, and 60.6–1,227 Bq· kg−1, respectively. The concentration values varied depending on the substrate and ecological environment. The moss accumulated greater amounts of 137Cs than the lichen, which was attributed to the greater surface-to-volume ratio of moss. The 137Cs activity concentrations in moss adhered to tree trunks were substantially lower than those in moss covering rock or soil. This was attributed to differences in 137Cs resuspension effect, which may occur through the spattering of raindrops and the effects of wind. The transfer factors of radionuclides from soil to moss were 0.61, 0.65, and 0.46 for 137Cs, 40K, and 7Be, respectively. Conclusion: This preliminary study showed that moss accumulates a considerably higher amount of 137Cs than mugwort. Therefore, mosses seem to be more suitable bioindicators than mugwort for the routine monitoring of radioactive fallout in Korea. However, further research using various moss species from ecological environments and sampling sites with different topography and other geographical properties is needed to reduce the uncertainties in the values estimated in the present study.

목차

ABSTRACT
Introduction
Materials and Methods
1. Study Area and Sampling
2. Sample Preparation
3. Method of Sample Analysis
Results and Discussion
1. Activity Concentrations
2. Characteristics of Radionuclide Accumulation
3. Applicability for Fallout Monitoring
Conclusion
Article Information
References

키워드

저자

• Dong-Myung Lee [ Korea Institute of Nuclear Safety, Daejeon, Republic of Korea ] Corresponding Author
• Su Jung An [ Korea Institute of Nuclear Safety, Daejeon, Republic of Korea ]
• Inhee Choi [ Korea Institute of Nuclear Safety, Daejeon, Republic of Korea ]
• Jiyon Lee [ Korea Institute of Nuclear Safety, Daejeon, Republic of Korea ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  방사선방어학회지 [Journal of Radiation Protection and Research]

• 간기

  계간

• pISSN

  2508-1888

• 수록기간

  1976~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 559 DDC 629