Soil vapor extraction of chlorinated solvents at an industrial site in Brazil

Nobre, Manoel de Melo Maia

doi:10.1016/j.jhazmat.2004.02.045

Cited by 23 publications

(12 citation statements)

References 3 publications

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“…Intplenterttubifity. Technologies for soil vapor extraction have becn discussed by many authors (e.g.. Chai and Miura, 2004;Nobre and Nobre, 2004;Shan et al, 1992;Falta et al, 1993 and many others). Further, Cameron et al (2002) have designed and conducted a field test for injection and withdrawal of a gas phase through the Hanford sediments.…”

Section: -20mentioning

confidence: 99%

Evaluation of Vadose Zone Treatment Technologies to Immobilize Technetium-99

PETERSEN¹

2006

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Section: -20mentioning

confidence: 99%

Evaluation of Vadose Zone Treatment Technologies to Immobilize Technetium-99

PETERSEN¹

2006

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Section: Reduction Oftoriciand Nrobiliry or W~i I~wmentioning

confidence: 99%

Evaluation of Vadose Zone Treatment Technologies to Immobilize Technetium-99

Petersen¹

2005

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“…Soil vapour extraction (SVE) is an in situ remediation method that has been extensively used for removal of volatile organic contaminants (VOCs) from the unsaturated zone due to low installation and maintenance costs combined with height efficiency. The movement of vapour in the subsurface is caused primarily by advection, which is related to the existence of pressure gradients that are developed during the operation of vapour extraction wells 1. Soil air permeability controls advective air flow and, therefore, determines if SVE is a feasible method for a given contaminated soil 2.…”

Section: Introductionmentioning

confidence: 99%

Influence of Soil Air Permeability Change on Soil Vapour Extraction Systems Design

Boudouch

Esrael

Kacem

et al. 2012

CLEAN Soil Air Water

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Soil air permeability plays a decisive role in the effectiveness of soil vapour extraction (SVE) for the removal of volatile organic contaminants (VOCs) from soil. The objective of this work is to study the change of the soil air permeability during continuous venting and removal of contaminant from a polluted soil. SVE pilot experiments were conducted to investigate the interaction of soil air permeability with total liquids saturation. Oppositely to previous studies, air permeability was measured by fitting pressure data measured in a 3D laboratory venting pilot to an analytical airflow solution. The experimental correlation was compared with two different correlations published previously. A difference was observed between measured and calculated air relative air permeabilities especially for low water saturation degrees. The importance of the correct estimate of relative permeability was then illustrated by comparing vacuums and streamlines calculated using measured permeability and permeability values estimated with the two correlations tested here. Results show that an inappropriate assessment of relative permeability may engender significant errors in designing an SVE system. The second part of this work reports on the influence of air permeability change on the prediction capability of an SVE mathematical model. A significant difference between simulated breakthrough curves, estimated using firstly the relationship established experimentally and secondly the two other correlations, was observed. These results lead us to say that inadequate characterization of the air permeability change may generate significant errors in removal rate and closure time estimates.

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Soil vapor extraction of chlorinated solvents at an industrial site in Brazil

Cited by 23 publications

References 3 publications

Evaluation of Vadose Zone Treatment Technologies to Immobilize Technetium-99

Evaluation of Vadose Zone Treatment Technologies to Immobilize Technetium-99

Evaluation of Vadose Zone Treatment Technologies to Immobilize Technetium-99

Influence of Soil Air Permeability Change on Soil Vapour Extraction Systems Design

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