Effects of Process Control Changes on Aquifer Oxygenation Rates during in Situ Air Sparging in Homogeneous Aquifers

Kyle W. Rutherford, Paul C. Johnson

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

In situ air sparging is used to remediate petroleum fuels and chlorinated solvents present as submerged contaminant source zones and dissolved contaminant plumes, or to provide barriers to dissolved contaminant plume migration. Contaminant removal occurs through a combination of volatilization and aerobic biodegradation; thus, the performance at any given site depends on the contaminant and oxygen mass transfer rates induced by the air injection. It has been hypothesized that these rates are sensitive to changes in process flow conditions and site lithology, but no data is available to identify trends or the magnitude of the changes. In this work, oxygenation rates were measured for a range of air injection rates, ground water flow rates, and pulsing frequencies using a laboratory-scale two-dimensional physical model constructed to simulate a homogeneous hydrogeologic setting. Experiments were conducted with water having low chemical and biochemical oxygen demand. Results suggest the following: that there is an optimum air injection rate; advective flow of ground water can be a significant factor when ground water velocities are > 0.3 m/d; and pulsing the air injection had little effect on the oxygenation rate relative to the continuous air injection case.

Original languageEnglish (US)
Pages (from-to)132-141
Number of pages10
JournalGround Water Monitoring and Remediation
Volume16
Issue number4
StatePublished - Sep 1996

Fingerprint

air sparging
Oxygenation
oxygenation
Aquifers
Process control
aquifer
Impurities
Air
pollutant
air
Groundwater
plume
Groundwater flow
Lithology
Biochemical oxygen demand
Chemical oxygen demand
Biodegradation
groundwater
Vaporization
biochemical oxygen demand

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Effects of Process Control Changes on Aquifer Oxygenation Rates during in Situ Air Sparging in Homogeneous Aquifers. / Rutherford, Kyle W.; Johnson, Paul C.

In: Ground Water Monitoring and Remediation, Vol. 16, No. 4, 09.1996, p. 132-141.

Research output: Contribution to journalArticle

@article{d33aaa85f0134c2fb43306c3bc1b4cdd,
title = "Effects of Process Control Changes on Aquifer Oxygenation Rates during in Situ Air Sparging in Homogeneous Aquifers",
abstract = "In situ air sparging is used to remediate petroleum fuels and chlorinated solvents present as submerged contaminant source zones and dissolved contaminant plumes, or to provide barriers to dissolved contaminant plume migration. Contaminant removal occurs through a combination of volatilization and aerobic biodegradation; thus, the performance at any given site depends on the contaminant and oxygen mass transfer rates induced by the air injection. It has been hypothesized that these rates are sensitive to changes in process flow conditions and site lithology, but no data is available to identify trends or the magnitude of the changes. In this work, oxygenation rates were measured for a range of air injection rates, ground water flow rates, and pulsing frequencies using a laboratory-scale two-dimensional physical model constructed to simulate a homogeneous hydrogeologic setting. Experiments were conducted with water having low chemical and biochemical oxygen demand. Results suggest the following: that there is an optimum air injection rate; advective flow of ground water can be a significant factor when ground water velocities are > 0.3 m/d; and pulsing the air injection had little effect on the oxygenation rate relative to the continuous air injection case.",
author = "Rutherford, {Kyle W.} and Johnson, {Paul C.}",
year = "1996",
month = "9",
language = "English (US)",
volume = "16",
pages = "132--141",
journal = "Groundwater Monitoring and Remediation",
issn = "1069-3629",
publisher = "Wiley-Blackwell",
number = "4",

}

TY - JOUR

T1 - Effects of Process Control Changes on Aquifer Oxygenation Rates during in Situ Air Sparging in Homogeneous Aquifers

AU - Rutherford, Kyle W.

AU - Johnson, Paul C.

PY - 1996/9

Y1 - 1996/9

N2 - In situ air sparging is used to remediate petroleum fuels and chlorinated solvents present as submerged contaminant source zones and dissolved contaminant plumes, or to provide barriers to dissolved contaminant plume migration. Contaminant removal occurs through a combination of volatilization and aerobic biodegradation; thus, the performance at any given site depends on the contaminant and oxygen mass transfer rates induced by the air injection. It has been hypothesized that these rates are sensitive to changes in process flow conditions and site lithology, but no data is available to identify trends or the magnitude of the changes. In this work, oxygenation rates were measured for a range of air injection rates, ground water flow rates, and pulsing frequencies using a laboratory-scale two-dimensional physical model constructed to simulate a homogeneous hydrogeologic setting. Experiments were conducted with water having low chemical and biochemical oxygen demand. Results suggest the following: that there is an optimum air injection rate; advective flow of ground water can be a significant factor when ground water velocities are > 0.3 m/d; and pulsing the air injection had little effect on the oxygenation rate relative to the continuous air injection case.

AB - In situ air sparging is used to remediate petroleum fuels and chlorinated solvents present as submerged contaminant source zones and dissolved contaminant plumes, or to provide barriers to dissolved contaminant plume migration. Contaminant removal occurs through a combination of volatilization and aerobic biodegradation; thus, the performance at any given site depends on the contaminant and oxygen mass transfer rates induced by the air injection. It has been hypothesized that these rates are sensitive to changes in process flow conditions and site lithology, but no data is available to identify trends or the magnitude of the changes. In this work, oxygenation rates were measured for a range of air injection rates, ground water flow rates, and pulsing frequencies using a laboratory-scale two-dimensional physical model constructed to simulate a homogeneous hydrogeologic setting. Experiments were conducted with water having low chemical and biochemical oxygen demand. Results suggest the following: that there is an optimum air injection rate; advective flow of ground water can be a significant factor when ground water velocities are > 0.3 m/d; and pulsing the air injection had little effect on the oxygenation rate relative to the continuous air injection case.

UR - http://www.scopus.com/inward/record.url?scp=0030231585&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030231585&partnerID=8YFLogxK

M3 - Article

VL - 16

SP - 132

EP - 141

JO - Groundwater Monitoring and Remediation

JF - Groundwater Monitoring and Remediation

SN - 1069-3629

IS - 4

ER -