• Ecology and Resilient Infrastructure
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• 제2권2호
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• pp.177-184
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• 2015

This study assessed the performance of activated carbon (AC) amendment to treat polycyclic aromatic hydrocarbons (PAHs) including both parent- and alkylated-moieties in sediment impacted by diesel. A field-collected, diesel-impacted sediment with a NAPL content of 1% was used for the study. No. 2 diesel fuel is weathered by heating at $70^{\circ}C$ for 4 days to obtain a weathered diesel sample having C3-naphthalenes to C2-phenanthrenes/anthracenes (N2/P3) ratio similar to the original sediment. The sediment samples spiked with the weathered diesel to obtain non-aqueous phase liquid (NAPL) contents of 1, 5 and 10% were contacted with AC with a dose of 5% as sediment dry weight for 1 month. By the AC-sediment contact, the freely-dissolved equilibrium concentrations were substantially reduced. Even for sediment with 10% NAPL content, the reductions in the freely-dissolved concentrations were 92% and 75% for total parent-and alkylated-PAHs, respectively. The effect of NAPL contents on the performance of AC was negligible for parent-PAHs, while for alkylated-PAHs, a slightly reduced AC performance was observed. The results suggest that the AC amendment can be an effective option for the treatment of petroleum-impacted sediment with relatively high NAPL contents.

• 한국지하수토양환경학회지:지하수토양환경
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• 제9권3호
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• pp.33-37
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• 2004

본 실험에 사용된 토양은 유류 유출사고가 발생한 후 7년 동안 방치 되어왔던 지역에서 채취되었으며 정성분석을 수행한 결과 풍화된 형태의 경유로 오염된 사실이 확인되었다. 토양 중 경유의 정량은 1999년 7월에 개정된 토양오염 공정시험방법 (시험법 1)과 US EPA method 8015b (시험법 2)에 준하여 이루어졌으며, 또한 2002년 7월에 개정되어 현재 시행되고 있는 토양오염공정시험방법 (시험법 3)과의 비교를 위하여 일부 추가 시료에 대한 정량분석이 수행되었다. 시험법 1을 적용하였을 때 분석에 사용된 총 46개의 시료 중 4개의 시료에서만 유류성분이 검출되었으며 시험법 2를 적용하였을 때는 모든 시료에서 유류성분이 검출되었으며 43개 시료의 농도가 토양오염우려기준인 2000mg/kg을 초과하였다. 시험법 2와 3에 의하여 수행된 결과를 이용하여 1차 회귀직선식을 도출해보면, 기울기 값이 0.9845로 높은 정의 상관관계($r^2$=0.99)를 보여주었다. 이들 결과로 볼 때 시험법 2와 3은 시험법 1과 비교하여 토양 중 풍화가 진행된 경유를 정량 할 경우 보다 적절한 방법으로 판단되었으며 시험법 2와 시험법 3은 거의 같은 수준의 정확성과 재현성을 보여주었다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 총회 및 춘계학술발표회
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• pp.289-292
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• 2004

In order to identify the origin and nature of the spilled oil in the potential source, we analyzed the pattern of alkyi PAM(Polynuclear Aromatic Hydrocarbons) in fuel standard and environmental samples. Alkyl PAM patterns are used for fuel-type identification in weathered environmental samples. Detection of alkyl PAH was achieved by operation CC/MS in the SIM mode. We chose ions of naphthalene(m/z 128), C1-naphthalene(m/z 142), C2-naphthalene(m/z 156), C3-naphthalene(m/z 170), C4-naphthalene(m/z 184) for the comparison of this pattern according to the type of fuel. We analyzed tile pattern of alkyl PAH in neat gasoline, kerosene, diesel, and JP-8, and in groundwater samples which were collected in monitoring wells. The distribution map of alkyl-naphthalene shows different patterns among four different fuel types (gasoline, kerosene, diesel, and JP-8). Particularly, tile distribution map of kerosene and JP-8 is found to be of value in identifying fuel type in that the difference is clear. Therefore distribution patterns of alkyl-PAH compounds provide another useful tool for fuel-type identification of petroleum fuels.