Groundwater cleanup by in-situ sparging. VIII. Effect of air channeling on dissolved volatile organic compounds removal efficiency

Journal Article · Thu Dec 01 04:00:00 EST 1994 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399408002200· OSTI ID:6575604

Wilson, D J; Gomez-Lahoz, C; Rodriguez-Maroto, J M ^[1]

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1. Universidad de Malaga (Spain)

A mathematical model for removal of dissolved volatile organic compounds (VOCs) from contaminated aquifers by in-situ air sparging is described. The model assumes that the sparging air moves through persistent channels in the aquifer, and that VOC transport to the sparging air is by diffusion/dispersion and air-induced circulation of the water in the vicinity of the sparging well. The dependence of model results on the parameters of the model is explored. The use of pulsed air flow in sparging as a means to increase VOC transport by dispersion is suggested. An extension and modification of the Sellers-Schreiber preliminary screening model for in-situ air sparging is also described. The revised model includes an improved method for calculating bubble residence times in the aquifer, and also permits the modeling of nonaqueous phase liquid (NAPL) removal.

• OSTI ID: 6575604
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 29:18; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540210 -- Environment
Terrestrial-- Basic Studies-- (1990-)
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
AIR INFILTRATION
AQUIFERS
DIFFUSION
DISPERSIONS
MASS TRANSFER
MATHEMATICAL MODELS
MATTER
ORGANIC COMPOUNDS
REMEDIAL ACTION
REMOVAL
SPARGERS
VOLATILE MATTER