토양경작 및 열탈착 공법을 적용한 유류오염토양(TPH) 정화 전‧ 후 토양건강성 평가 사례연구
Case Study on Evaluated Soil Health Properties Before and After Land Farming and Thermal Desorption for TPH-contaminated Soil
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초록
본 연구는 석유계 총 탄화수소(TPH)로 오염된 주유소 및 군사시설 부지 내 토양을 토양경작공법 및열탈착공법을 적용하여 정화실험을 진행하였다. 이러한 공법을 적용하면 오염농도를 저감 할 수있으나 토양건강성에도 영향을 미칠 수 있다. 이에 본 연구에서는 온도, 함수율, 적용시간에 대해변화를 주어 정화 전후의 토양건강성을 비교하였다. 분석 결과 물리적 특성(용적밀도)은 거의 변화를 보이지 않았으며, 화학적 특성(pH, EC, CEC, 유효인산, 토양호흡)은 대부분 원시료 보다 증가하는 경향을 보였고, 생물학적 특성(유기물함량, 토양효소)은 크게 감소하는 것을 확인하였다. 이러한 연구의 결과는 정화토양을 다양한 목적으로 재활용하기 위한 기초적인 자료제공과 토양건강성저감을 개선하기 위한 기본적인 자료로 이용될 수 있다.
Abstract
In this study, land farming and thermal desorption methods were applied for remediation experiments of contaminated soils with total petroleum hydrocarbons (TPH) at gas stations and military facilities. Applying these methods can reduce the contamination concentration, but it can also affect soil health. Each method was divided into unit processes to compare the variation of soil health properties such as temperature, water content, and time applied. Physical property (bulk density) was almost unchanged, chemical properties (pH, EC, CEC, available P2O5, and soil respiration) increased as compared to native soils, and biological properties (organic matter and β-glucosidase) have been reduced significantly. The results of this study can be used as primary data to recover deteriorated properties of remediated soils for the intended purpose of recycling.
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