Air flow paths and porosity/permeability change in a saturated zone during in situ air sparging

Tsai, Yih-Jin

doi:10.1016/j.jhazmat.2006.08.014

Cited by 27 publications

(10 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In theˆeld of air-sparging for subsurface remediation, mathematical modelings and numerical simulations are popular to predict behavior of a multiphase ‰ow within soils (Lundegard and Andersen, 1996;McCray, 2000;Tsai, 2007). Speciˆcally, McCray (2000) reviewed the existing mathematical models describing the behavior moderated by air sparging and concluded that the multiphase ‰ow models might be very useful to describe a desaturation process induced by air sparging as long as detailed model calibration is well-conducted.…”

Section: Introductionmentioning

confidence: 99%

Experiments and Predictions of Soil Desaturation by Air-Injection Technique and the Implications Mediated by Multiphase Flow Simulation

Yasuhara

Okamura

Kochi

2008

Soils and Foundations

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Experiments and Predictions of Soil Desaturation by Air-Injection Technique and the Implications Mediated by Multiphase Flow Simulation

Yasuhara

Okamura

Kochi

2008

Soils and Foundations

View full text Add to dashboard Cite

“…휘발성오염물질로 오염된 지역의 정화에 효과인 방법으로 알려져 있다 (Johnston et al, 2002;Kaleris andCroise, 1997, 2002;Chu et al, 2004 (McCray and Falta, 1995;Benner et al, 2002;Nobre and Nobre, 2004;Tsai, 2007). …”

Section: 서 론 토양증기추출법은 지중토양에 압력구배를 형성하여 토 양표면의 휘발성 오염물질을 휘발·추출하는 방법으로써unclassified

Calculation of Radius of Influence and Evaluation of Applicability of Air Sparging/Soil Vapor Extraction system for the Remediation of Petroleum Contaminated Rail Site

Cho¹,

Park²,

Kim

et al. 2015

Journal of Soil and Groundwater Environment

View full text Add to dashboard Cite

The objectives of this study were to calculate the radius of influence (ROI) of well for an air-sparging (AS)/soil vapor extraction (SVE) system and to evaluate the applicability of the system applied for the remediation of the petroleum contaminated rail site. For air permeability test, three monitoring wells were installed at a location of 1.3 m, 2.3 m, 3.0 m from the extraction well. And the pressure of each monitoring well was measured by extracting air from the extraction well with the pressure and flow of (−)2,600 mmH 2 O and 1.58 m 3 /min. The ROI for an extraction well was calculated as 4.31 m. Air was injected into the injection well with the pressure and flow of 3,500 mmH 2 O and 0.6 m 3 /min to estimate the radius of influence for oxygen transfer. Oxygen concentrations of air from three monitoring wells were measured. The ROI of an injection well for oxygen transfer was calculated as 3.46 m. The 28 extraction wells and 19 injection wells were installed according to the ROI calculated. The AS/SVE system was operated eight hours a day for five months. The rail site was contaminated with the petroleum and concentrations of benzene, toluene, and xylene were over the 'Worrisome Standard' of the 'Soil Environment Conservation Act'. The contaminated area was estimated as 732 m 2 and contaminants were dispersed up to (−)3 m from the ground. During the operation period, soil samples were collected from 5 points and analyzed periodically. With the AS/SVE system operation, concentrations of benzene, toluene, and xylene were decreased from 7.5 mg/kg to 2.0 mg/kg, from 32.0 mg/kg to 23.0 mg/kg, from 35.5 mg/kg to 23.0 mg/kg, respectively. The combined AS/SVE system applied to the rail site contaminated with volatile organic compounds (VOCs) exhibited a high applicability. But the concentration of contaminants in soil were fluctuated due to the heterogeneous of soil condition. Also the effect of the remediation mechanisms was not clearly identified.

show abstract

“…Some previous workers have described the relationship between water flow rate and soil particle movement [12][13][14][15][16]18,19]. Additionally, El-Farhan et al [18] performed four subsequent infiltration experiments.…”

Section: Change In Porositymentioning

confidence: 99%

“…The model, developed by Young [22,23], of a multicomponent multiphase flow in a porous medium was used to simulate the distribution of gas saturation for air sparging [16,24]. The target site had to be segmented into several grids before simulation.…”

Section: Numerical Simulator For Air Spargingmentioning

confidence: 99%

See 1 more Smart Citation

Air flow paths and porosity/permeability change in a saturated zone during in situ air sparging

Cited by 27 publications

References 23 publications

Experiments and Predictions of Soil Desaturation by Air-Injection Technique and the Implications Mediated by Multiphase Flow Simulation

Experiments and Predictions of Soil Desaturation by Air-Injection Technique and the Implications Mediated by Multiphase Flow Simulation

Calculation of Radius of Influence and Evaluation of Applicability of Air Sparging/Soil Vapor Extraction system for the Remediation of Petroleum Contaminated Rail Site

Air distribution and size changes in the remediated zone after air sparging for soil particle movement

Contact Info

Product

Resources

About