A pragmatic approach for estimation of source-zone emissions at LNAPL contaminated sites

Miles, B.; Maji, R.; Sudicky, Edward A.; Teutsch, Georg; Peter, Anita

doi:10.1016/j.jconhyd.2007.10.003

Cited by 9 publications

(4 citation statements)

References 20 publications

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“…The simulations are conducted with the multiphase modelling software TMVOC (Pruess and Battistelli 2002) via the graphical user interface PetraSim (Thunderhead Engineering 1999-2008) on 2D small scale, calibrated by laboratory experiments. Thirteen different groundwater flow velocities ranging from centimetres per day up to several tens of metres and four different realizations of geometrical set-ups of the subsoil are investigated, resulting in a total of 28 scenarios.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore the influence of small scale heterogeneities is investigated as well as the changed geometry of the free phase DNAPL body in the saturated zone, since dissolution behaviour and therefore mass flux are directly dependent on the orientation and the geometry of a NAPL pool within the saturated zone, as investigated by Sale and McWhorter (2001), Fure et al (2006) and Miles et al (2008).…”

Section: Introductionmentioning

confidence: 99%

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Simulation of DNAPL infiltration and spreading behaviour in the saturated zone at varying flow velocities and alternating subsurface geometries

et al. 2011

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The influence of varying groundwater flow velocities on DNAPL infiltration and spreading behaviour was investigated by multiphase modelling using TMVOC and PetraSim. The multiphase models were calibrated by results of previously conducted laboratory experiments for the complete spatio-temporal range of the experiments. The small scale 2D scenario modelling was applied to qualify and quantify changes in position, architecture, geometry and dissolution of a TCE body in a fully saturated homogeneous sandy medium. The applied flow velocities ranging from 0.05 up to 40.00 m/day exhibited that the DNAPL TCE is affected even at the lowest flow velocity in its position, its size and its architecture. Additionally, several impermeable lenses with simple geometry were assumed in the model, to investigate the influence of stratified subsoil. In the experimental set-ups, the DNAPL body reacts more sensitive to the applied groundwater flow velocities than to the geometrical set-up of the scenarios. A possible consequence can be the transportation and displacement of a DNAPL pool due to natural or anthropogenic induced high groundwater flow velocities, as by Pump and Treat facilities, complicating site investigation process and planning of remediation activities.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation of DNAPL infiltration and spreading behaviour in the saturated zone at varying flow velocities and alternating subsurface geometries

et al. 2011

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“…3, which was 66 cm ugl. Such fluctuation of water surface can increase solubility of organic pollutants in groundwater [14]. All water samples taken are characterised by intensive greenish colour, especially the samples taken from piezometers no.…”

Section: Resultsmentioning

confidence: 99%

Organic Pollutants in Groundwater in the Former Airbase

Rosik-Dulewska¹,

Ciesielczuk²,

Krysiński³

2012

Archives of Environmental Protection

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Oil derivatives are commonly used and they play a key role in the economy. They are used in many industries. Such big amounts of oil derivatives products generate vast quantity of pollution. Those pollutants can get into the ground and water beyond any control during catastrophes or due to inadequately managed waste and storage. The aim of the paper was to determine the level of oil derivatives pollution in the groundwater on the area of a former airbase, where between 1950 and 1990 the Soviet Army stationed. Analysis was carried out on groundwater samples from three piezometers placed on the area of the former airbase. In the samples some parameters were determined, i.e. temperature, reaction, electrolytic conductivity, the depth of groundwater surface, the content of aliphatic hydrocarbons, monoaromatic and polycyclic aromatic hydrocarbons. Determined amount of dissolved hydrocarbons was large what proves unsatisfactory effectiveness of previous rehabilitation processes.

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“…When the spillage of liquid organic hydrocarbon is sufficient, NAPLs can reach the groundwater table as a free phase. Most of NAPLs are sparingly soluble in water, so they can move separately during the flow of water through the soil matrix or they can be partially dissolved in groundwater, spreading throughout the contaminated site (Harwell et al, 1999;Miles et al, 2008). NAPLs not only have low water solubilities, but also very high toxicities that can threaten soil and groundwater in a large scale, as well as human beings.…”

Section: Introductionmentioning

confidence: 99%

In-situ biosurfactant flushing, coupled with a highly pressurized air injection, to remediate the bunker oil contaminated site

Lee

Kim

2011

Geosci J

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In-situ biosurfactant flushing, coupled with a highly pressurized air injection, to remediate the bunker oil contaminated site ABSTRACT: A pilot scale test for in-situ biosurfactant flushing coupled with a highly pressurized air injection (HPAI) was performed to remediate a bunker oil contaminated site. The contaminated area was located in Ulsan, Korea, which had been used for a roofing tile manufacturing facility for 25 years. This site was mainly contaminated by the leakage of bunker A-and C-oil from the old underground storage tank (the average TPH concentration of soil was 1,820 mg/kg). A pilot scale test site (17 m × 12 m × 4 m) was selected in the contaminated area and twelve injection wells and two extraction wells were established at the site. Two percent of biosurfactant solution was flushed into each injection well at 2 L/min, followed by HPAI (20 kgf/cm 2 ) to accelerate the mobility of flushed solution in pore spaces and thus to increase the removal efficiency of in-situ flushing. The process of biosurfactant flushing with HPAI was repeated until about 1.9 pore volumes of biosurfactant solution (350 tons) were flushed at the test site. The effluent solution was gathered and treated by a post treatment process that included a chemical reaction tank. A total of 2.2 ton of TPH (82% of the initial TPH) was removed from the site within 1.9 pore volumes of biosurfactant solution flushing resulting in the average TPH concentration of the residual soil being below 500 mg/kg, suggesting that the in-situ biosurfactant flushing coupled with HPAI, is very useful in remediating bunker oil contaminated sites.

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A pragmatic approach for estimation of source-zone emissions at LNAPL contaminated sites

Cited by 9 publications

References 20 publications

Simulation of DNAPL infiltration and spreading behaviour in the saturated zone at varying flow velocities and alternating subsurface geometries

Simulation of DNAPL infiltration and spreading behaviour in the saturated zone at varying flow velocities and alternating subsurface geometries

Organic Pollutants in Groundwater in the Former Airbase

In-situ biosurfactant flushing, coupled with a highly pressurized air injection, to remediate the bunker oil contaminated site

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