토양과 공기 중 석면함량의 상관분석을 위한 현장시험장치 개발 및 적용
Development and Application of Field Trial Device for Correlation of Asbestos Contents in Soil with in Air
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본 연구는 현장규모에서 자체 제작된 현장시험장치를 이용하여 토양과 공기 중 석면함량의 상관관계를 분석하고자 하였다. 현장에서 8 m/s, 11 m/s, 15 m/s 및 18 m/s의 다양한 풍속에 의한 석면의 비산 정도를 측정하였다. 토양시료는 편광현미경법과 주사전자현미경법 및 X-선분광분석을 하였으며, 대기 시료는 위상차현미경법을 이용하였다. 실험결과, 현장시험장치의 작동성 및 편의성이 입증되었으며, 풍속이 증가할수록 비산되는 공기 중 석면 농도가 증가하는 뚜렷한 양의 상관관계가 나타난 반면, 토양 습도가 증가할수록 비산되는 공기 중 석면농도는 감소하는 음의 상관관계가 나타났다. 특히 토양의 석면함량이 3∼6%인 경우, 토양습도와 풍속의 조건에 따라 실내 공기질 권고 기준을 초과하는 경우가 나타났다. 따라서, 토양 내 석면의 함량이 약 3% 이상인 곳을 우선적으로 복원해야 할 것으로 판단된다.
Abstract
The objective of this study is to analyze the correlation of asbestos contents in soil with in air using field trial device in field scale experiment. Various wind velocities, 8 m/s, 11 m/s, 15 m/s and 18 m/s, respectively, were applied to evaluate releasable characteristics of the field trial device. Collected soil samples were analyzed by polarized light microscopy and SEM-EDS. Each air sample was examined by phase contrast microscopy. As a result, the field trial device was operable and its use was with ease. The correlation of asbestos contents in air with wind velocities represented positive, while the correlation of soil humidity with in air showed negative. In the case of 3∼6% asbestos contents in soil, it exceeded the acceptable risk range for exposure depending on soil humidity and wind velocity. It is suggested that remediation priority should be given to the site of >3% asbestos contents in soil.
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