• Title/Summary/Keyword: Crude oil contamination

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GEOTECHNICAL CHARACTERISTICS OF CRUDE OIL-CONTAMINATED GROUND (원유(Crude-Oil)로 오염된 지반의 역학적 특성)

  • 신은철;홍승서;강욱현
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • 1997.05a
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    • pp.43-46
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    • 1997
  • The results of an investigation conducted to study the effect of crude oil contamination on the geotechnical properties of sand of presented. The effect of the degree of oil contamination on compaction characteristics, shear strength, and one-dimensional compression characteristics has been investigated. The test results indicate that the compaction characteristics are somewhat influenced by oil contamination. The angle of internal friction of sand (based on total stress basis) decreases due to the presence of oil within the pore spaces in sand. The compression characteristics of sand are significantly-influenced by oil contamination. The details of the tests conducted and the results are presented in the paper.

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Geotechnical Characteristics of Crude Oil-Contaminated Sands (원유(Crude-Oil)로 오염된 사질토외 공학적 특성)

  • Eun Chul Shin;Seung Seo Hong
    • Journal of Korea Soil Environment Society
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    • v.2 no.1
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    • pp.91-97
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    • 1997
  • The result of an investigation conducted to study the effect of crude oil contamination on the geotechnical properties of sand is presented. The effect of the degree of oil contamination on compaction charateristics, shear strength, and one-dimensional compression charateristics has been investigated. The test results indicate that the compaction charateristics are somewhat influenced by oil contamination The angle friction of sand (based on total stress basis) decreases due to the presence of oil within the pore spaces in sand. The compression charateristics of sand are significantly influenced by oil contamination. The details of the tests conducted and the results are presented in the paper.

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Geotechnical Characteristics of Crude Oil-Contaminated Sandy Ground (원유로 오염된 지반의 역학적 특성)

  • 신은철;이재범
    • Geotechnical Engineering
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    • v.13 no.6
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    • pp.37-44
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    • 1997
  • In this paper, the effects of crude oil contamination on the geotechnical properties of sand such as compaction characteristics, shear strength, permeability, and bearing capacity are presented. The test results indicate that the compaction characteristics are somewhat influenced by oil contamination. The angle of internal friction of sand based on total stress analysis decreases due to the presence of oil within the pore spaces in Band. The bearing capacity of sand is significantly influenced by oil contamination.

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Heavy Metal Contamination in Sediments by Herbei Sprit Oil Spill (허베이 스피리트 원유 유출 사고에 의한 퇴적물의 중금속 오염)

  • Song, Yun Ho;Choi, Man Sik;Woo, Jun Sik;Sim, Won Joon
    • The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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    • v.18 no.2
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    • pp.70-79
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    • 2013
  • Since crude oil contains various pollutants including heavy metals, the environmental impact should be assessed for heavy metals as well as oil itself. In order to estimate the extent of heavy metal contamination, surface sediments were collected at the intertidal and coastal zone around the Herbei sprit oil spill area during December 2007 and January 2008. Organic carbon, sulfur and heavy metals were determined to assess heavy metal contamination in sediments. The crude oils contained C, S, V and Ni, but little toxic metals such as As, Cd, etc. From organic carbon content, the highest contaminated site was estimated that oils contributed to sediments up to 10%, and this site showed high V concentration. Potentially contaminated sediments by crude oil could be differentiated from unaffected sediments through V/Al and Ni/Al ratios, which can be used as indicators of oil contamination even after the oils were fully degraded.

The Study of Crude Oil Contaminated Soil Remediation by Indirect Thermal Desorption (간접열탈착방식을 이용한 원유오염토양 정화효율 평가)

  • Lee, In;Kim, Jong-Sung;Jung, Tae-Yang;Oh, Seung-Taek;Kim, Guk-Jin
    • Journal of Soil and Groundwater Environment
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    • v.21 no.3
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    • pp.14-20
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    • 2016
  • Remediation of crude oil contaminated soil is complicate and hard to apply traditional methods because of its persistency, durability, and high viscosity. Therefore, in this study, the efficiency of crude oil contaminated soil remediation was tested by developing a pilot-scale thermal desorption system using the indirect heating method with an exhaust gas treatment. Under optimal condition drawed by temperature and retention time, the remedial efficiency of crude oil contaminated soil and treatability of exhaust gas were analyzed. Total Petroleum Hydrocarbon (TPH) concentration of crude oil contaminated soil was decreased to 69.7 mg/kg on average and the remedial efficiency was measured at 99.60%. Through the exhaust gas, 86.0% of Volatile Organic Compounds (VOC) was degraded and 97.16% of complex malodor was reduced under the suggested optimum operation condition. This study provides important basic data to be useful in scaling up of the indirect thermal desorption system for the remediation of crude oil contaminated soil.

Evaluation of Bioremediation Efficiency of Crude Oil Degrading Microorganisms Depending on Temperature (온도에 따른 원유분해미생물의 생물학적 정화효율 평가)

  • Kim, Jong-Sung;Lee, In;Jeong, Tae-Yang;Oh, Seung-Taek;Kim, Guk-Jin
    • Journal of Soil and Groundwater Environment
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    • v.21 no.1
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    • pp.72-79
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    • 2016
  • Bioremediation is one of the most effective ways to remediate TPH-contaminated sites. However, under actual field conditions that are not at the optimum temperature, degradation of microorganisms is generally reduced, which is why the efficiency of biodegradation is known to be significantly affected by the soil temperature. Therefore, in this study, the labscale experiment was conducted using indigenous crude oil degrading microorganisms isolated from crude oil contaminated site to evaluate the remediation efficiency. Crude oil degrading microorganisms were isolated from crude oil contaminated soil and temperature, which is a significant factor affecting the remediation efficiency of land farming, was adjusted to evaluate the microbial crude oil degrading ability, degradation time, and remediation efficiency. In order to assess the field applicability, the remediation efficiency was evaluated using crude oil contaminated soil (average TPH concentration of 10,000 mg/kg or more) from the OO premises. Followed by the application of microorganisms at 30℃, the bioremediation process reduced its initial TPH concentration of 10,812 mg/kg down to 1,890 mg/kg in 56 days, which was about an 83% remediation efficiency. By analyzing the correlation among the total number of cells, the number of effective cells, and TPH concentration, it was found that the number of effective microorganisms drastically increased during the period from 10 to 20 days while there was a sharp decrease in TPH concentration. Therefore, we confirmed the applicability of land farming with isolated microorganisms consortium to crude oil contaminated site, which is also expected to be applicable to bioremediation of other recalcitrant materials.

Mechanical Properties of Oil Pollution Sand Due to Changes in the Viscosity of Oil (점도 변화에 따른 유류오염 모래의 역학적 특성)

  • Hong, Seung Seo;Bae, Gu-Jin;Kim, YoungSeok
    • The Journal of Engineering Geology
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    • v.25 no.4
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    • pp.577-585
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    • 2015
  • Contamination of soil due to an oil spill influences its subsequent behavior. An investigation was conducted to study the effect of oil viscosity on compaction characteristics, coefficient of permeability, and shear strength. Water permeability was also determined by using Kerosene, Engine oil, and Crude-oil as contaminants. The test results indicate that the compaction characteristics are influenced by oil contamination. Direct shear test was conducted to investigate the effect of oil in the pore space in sandy ground. angle of internal friction of sand (based on total stress condition) decreases due to presence of oil within the pore spaces in sand.

Numerical Simulation and Experimental Study on an Ejector System for VOC Recovery (VOC 회수를 위한 이젝터 시스템에 관한 수치모사 및 실험적 연구)

  • Kim, Hyun-Dong;Lee, Dong-Yeop;Kim, Yoon-Kee;Jeong, Won-Taek;Ahn, Joo-Ha;Kim, Kyung-Chun
    • Journal of the Korean Society of Visualization
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    • v.9 no.2
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    • pp.54-60
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    • 2011
  • This paper is a basic study on volatile organic compounds(VOC) recovery system in a crude oil carrier. VOC is easily evaporated in cargo tankers during loading and transportation of crude oil, causes serious environmental contamination and a huge economic loss. An ejector system is designed to mix VOC gas into crude oil flow to reduce VOC concentration. Detail two-phase flow inside the ejector is simulated using a commercial CFD code. To verify the numerical prediction, a scale-down experiment is conducted. Instead of crude oil and VOC, water and air are used as the working fluids. Flow characteristics and main parameters are obtained by two-phase flow visualization and PIV measurements. Air volume flow rate induced by the ejector is compared with respect to the volume flow rate of water using experimental and numerical results. Overall performance of the two-phase ejector predicted by the CFD simulation agrees well with that of the experiment.