Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Effects of Compost Amendment on Petroleum Hydrocarbon Removal and ATP Concentration in Bioremediation of Diesel Contaminated Soil

디젤오염토앙의 생물학적 복원에 있어서 유기질비료의 첨가가 석유계 탄화수소의 분해 및 ATP 변화에 미치는 영향

  • Lee, Joo-Heon (Division of Architecture, Civil and Environmental Engineering, Taegu University) ;
  • Jun, Kwan-Soo (School of Civil and Environmental Engineering, Yeungnam University)
  • 이주헌 (대구대학교 건설환경공학부) ;
  • 전관수 (영남대학교 건설환경공학부)
  • Published : 2006.07.31
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Abstract

The effects of compost amendment on the removal of petroleum hydrocarbons and the activities of microorganisms in soil ecosystem have been studied in bioremediation of diesel contaminated soil. The relation between biological activities and removal of petroleun hydrocarbon was determined by ATP(Adenisine Triphosphate), n-alkanes and TPH concentration analysis. After 80 days of bioremediation, the removal of TPH in soil amended with compost increased more than 10% compared with control soil which was tilled in the same condition without compost addition. The biodegradations of n-alkanes having 12 to 20 moles of carbon were distinctive. As the soil was contaminated with more diesel, the ATP has decreased rapidly. When the TPH amounted to 80,000 mg diesel/kg, the ATP decreased to 4 ng/g from initial concentration of 65 ng/g. While the ATP in the compost amended soil increased to 112 ng/g after tilling for 6 days, the ATP in the control increased to merely 36 ng/g after tilling for 14 days. Also while the control soil showed a lag time in ATP increase, the compost amended soil did not show that but showed a rapid ATP increase within a short time. The patterns of changes in ATP concentration were similar to those in daily removals of TPH with time difference of about 7 days.

디젤로 오염된 토양에서 유기질비료의 투여가 석유계탄화수소의 생분해에 미치는 영향을 연구하는 한편, 토양의 생태활성과 디젤의 분해도의 관계를 규명하기 위하여 토양내 ATP(Adenosine Triphosphate)농도를 측정하였다. 초기의 자연상태에서 65 ng/g이었던 ATP 농도는 디젤의 오염이 가중됨에 따라 급속하게 감소하여 유류오염도가 80,000 mg diesel/kg까지 증가하자 4 ng/g으로 크게 감소하였다. 건토기준 10%의 유기질비료를 투입한 결과 석유계총탄화수소의 80일간 최종분해율은 대조시료에 비하여 10% 이상 증가되었고, 특히 $C12{\sim}C20$에 해당하는 n-alkanes의 분해가 증가되었다. 또한 유기질비료를 혼합한 경우가 대조시료에 비하여 약 3배 정도의 ATP 농도증가를 보여주어 6일후 112 ng/g의 ATP 농도를 보여주었고, ATP 농도증가의 형태에 있어서도 지연시간을 나타내지 않고 빠른 시간 내에 급속한 증가를 보여주었다. 석유계총탄화수소의 일평균 감소와 ATP 농도는 약간의 시간차이를 두고 유사한 형태를 보여주었다.

Keywords

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