All Issue

2014 Vol.51, Issue 1

Research Paper

28 February 2014. pp. 1-8
Abstract
The objective of this study is to examine a releasable asbestos sampler for measuring releasable asbestos from soil to air controlled by wind velocity, water contents and volumes of air sampling. Asbestos contaminated soils at the Kwangcheon mine were sampled, air-dried and homogenized during 24 hours' agitation. As a result of analysis, 0.25% of asbestos and enriched Ni and Cr were detected. Various wind velocities were applied to evaluate releasable characteristics. In addition, soils with various water contents and volumes of air sampling were also examined. By releasable test, friable asbestos contents were increased with wind velocity and negatively correlated with water contents. As increasing the wind velocity from 1 m/s to 5 m/s, friable asbestos contents in air samples was increased up to 25 times. This study also found that over 15% of water contents in soils can be limited in friability of asbestos in soils.
이 연구에서는 석면 위해성 평가를 위한 활동근거시료채취방법의 대안으로 석면 비산성 평가 장비를 이용하여 풍속, 토양 함수율 및 시료채취 흡입양에 따른 토양으로부터 공기 중으로 비산되는 석면의 양을 평가하고자 하였다. 비산성 실험은 광천광산 주변 농경지 토양을 대상으로 비균질 토양(원시료)과 24시간 동안 균질화 작업을 수행한 균질 토양으로 구분하여 실험을 수행하였다. 비균질 토양의 경우, 다양한 풍속(1∼5 m/s)을 적용하였고, 균질 토양은 풍속을 3 m/s로 설정한 후 다양한 함수율과 흡입유량(400 L, 800 L 및 1,200 L, 누적)을 적용하였다. 토양 중 석면 함유량 분석결과 0.25%로 확인되었고, 중금속은 Ni과 Cr의 함량이 높게 평가되었다. 비산성 실험결과, 풍속이 증가하고 함수율이 감소할수록 비산되는 석면의 양이 증가하였다. 특히, 풍속이 1 m/s에서 5 m/s로 증가함에 따라 공기 중 석면 농도는 약 25배 증가하는 것으로 확인되었다. 또한, 토양 함수율이 약 15% 이상에서 석면 비산이 제한적인 것으로 평가되었고 흡입유량이 증가할수록 공기 중 석면 농도는 감소하는 특징을 보였다.
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Information
  • Publisher :The Korean Society of Mineral and Energy Resources Engineers
  • Publisher(Ko) :한국자원공학회
  • Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
  • Journal Title(Ko) :한국자원공학회지
  • Volume : 51
  • No :1
  • Pages :1-8