ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1993.tb00447.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1993.tb00448.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1993.tb00449.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1993.tb00450.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1993.tb00451.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1993.tb00452.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1993.tb00453.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1993.tb00454.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

AbstractLaboratory flow visualization experiments, using glass beads as the porous medium, were conducted to study air sparging, an innovative technology for subsurface contaminant remediation. The purpose of these experiments was to observe how air flows through saturated porous media and to obtain a basic understanding of air plume formation and medium heterogeneity effects. The experiments indicate that air flow occurring in discrete, stable channels is the most probable flow behavior in medium to fine grained water saturated porous media and that medium heterogeneity plays an important role in the development of air channels. Several simulated scales of heterogeneities, from pore to field, have been studied. The results suggest that air channel formation is sensitive to the various scales of heterogeneities. Site‐specific hydrogeologic settings have to be carefully reviewed before air sparging is applied to remediate sites contaminated by volatile organic compound

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1993.tb00455.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

AbstractIn situ air sparging (IAS) is becoming a widely used technology for remediating sites contaminated by volatile organic materials such as petroleum hydrocarbons. Published data indicate that the injection of air into subsurface water saturated areas coupled with soil vapor extraction (SVE) can increase removal rates in comparison to SVE alone for cases where hydrocarbons are distributed within the water saturated zone. However, the technology is still in its infancy and has not been subject to adequate research, nor have adequate monitoring methods been employed or even developed. Consequently, most IAS applications are designed, operated, and monitored based upon the experience of the individual practitioner.The use of in situ air sparging poses risks not generally associated with most practiced remedial technologies: air injection can enhance the undesirable off‐site migration of vapors and ground water contamination plumes. Migration of previously immobile liquid hydrocarbons can also be induced. Thus, there is an added incentive to fully understand this technology prior to application.This overview of the current state of the practice of air sparging is a review of available published literature, consultation with practitioners, a range of unpublished data reports, as well as theoretical considerations. Potential strengths and weaknesses of the technology are discussed and recommendations for future investigations are give

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1993.tb00456.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY