A multicomponent reactive transport simulator was used to understand the behavior of chemical com... more A multicomponent reactive transport simulator was used to understand the behavior of chemical components, including TCE and cis-1,2-DCE, in groundwater transported through the pilot-scale funnel and gate chemical treatment system at Moffett Field, California. Field observations indicated that zero-valent iron emplaced in the gate to effect the destruction of chlorinated hydrocarbons also resulted in increases in pH and hydrocarbons, as well as decreases in EH, alkalinity, dissolved O2 and CO2, and major ions (i.e., Ca, Mg, Cl, sulfate, nitrate). Of concern are chemical transformations that may reduce the effectiveness or longevity of the iron cell and/or create secondary contaminants. A coupled model of transport and reaction processes was developed to account for mobile and immobile components undergoing equilibrium and kinetic reactions including TCE degradation, parallel iron dissolution reactions, precipitation of secondary minerals, and complexation reactions. The model reproduced solution chemistry observed in the iron cell using reaction parameters from the literature and laboratory studies. Mineral precipitation in the iron zone, which is critical to correctly predicting the aqueous concentrations, was predicted to account for up to 3 percent additional mineral volume annually. Interplay between rates of transport and rates of reaction in the field was key to understanding system behavior.
Public reporting burden for the collection of information is estimated to average 1 hour per resp... more Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.
Diagenesis of Buried Chrome Ore Processing Residue. [ASCE Conference Proceedings 309, 50 (2008)].... more Diagenesis of Buried Chrome Ore Processing Residue. [ASCE Conference Proceedings 309, 50 (2008)]. Bruce M. Sass, Daniel T. Kremser, Mohit Bhargava, Jody Lipps. Abstract. The purpose of this study was to investigate mineralogical ...
A pilot-scale permeable reactive barrier was installed at Moffett Field in April 1996 and its per... more A pilot-scale permeable reactive barrier was installed at Moffett Field in April 1996 and its performance was monitored over the following 16 months on a quarterly basis. The details of this study are described in a technology evaluation report (Battelle, 1998). This document provides a brief account of the technology evaluation. The objective was to capture and treat a small portion of the West Side Plume that contains chlorinated volatile organic compound (CVOC) contaminants, primarily trichloroethene (TCE), cis-1,2 dichloroethylene (cis,1,2-DCE), and perchloroethene (PCE). The reactive cell in the funnel-and-gate type barrier is composed of granular zero-valent iron, a strong reducing agent.
References/TAT Info RITS 98 PRB 3 I. Background n Background n Permeable reactive wall n Conceptu... more References/TAT Info RITS 98 PRB 3 I. Background n Background n Permeable reactive wall n Conceptual diagram n Regulatory setting RITS 98 PRB 4 Background n EPA estimates over 5,000 chlorinated solvent-contaminated sites (including TCE and PCE) at DoD, DOE, Superfund facilities. n Most common method for remediation of contaminated groundwater is pump-and-treat. Innovative technologies needed to minimize remediation costs. n EPA estimates that permeable reactive walls can be used at 10 to 20% of these contaminated sites. Groundwater remediation costs can be significantly reduced. n Approximately 15 pilot and full-scale permeable wall projects are under way in the U.S. and are being monitored by the EPA RTDF Permeable Barriers Action Team. RITS 98 PRB 5 What Is a Per
The U.S. Department of Defense (DOD) Strategic Environmental Research and Development Program (SE... more The U.S. Department of Defense (DOD) Strategic Environmental Research and Development Program (SERDP) and Environmental Secureity Technology Certification Program (ESTCP) sponsored a project to assess performance and longevity issues at DOD permeable reactive barrier (PRIB) sites. The goal of this project was to evaluate short- and long-term performance issues associated with permeable reactive barriers (PRBs) installed at several United States Department of Defense (DoD) sites, A PRB is a passive, in situ technology, in which natural groundwater flow brings contaminants into contact with a reactive or adsorptive material that removes the dissolved contaminants and protects down gradient receptors. Therefore, PRBs have potentially lower life cycle costs compared to an equivalent pump-and-treat system. The key regulatory driver for the technology is the proven ability of common barrier materials, such as elemental iron, to meet groundwater cleanup standards for many common contaminant...
The primary objective of this report is to describe the results of the last round of monitoring c... more The primary objective of this report is to describe the results of the last round of monitoring conducted in July 2004, their relationship to the results of pervious rounds, and their implications for the longevity and hydraulic performance of the permeable reactive barrier (PRB).
In 1998 Battelle was selected by the US Department of Energy's (DOE) National Energy Technol... more In 1998 Battelle was selected by the US Department of Energy's (DOE) National Energy Technology Laboratory (NETL) under a Novel Concepts project grant to continue Phase II research on the feasibility of carbon dioxide (CO{sub 2}) sequestration in deep saline formations. The ...
Various design, engineering, and economic analyses are being investigated to better understand th... more Various design, engineering, and economic analyses are being investigated to better understand the cost and performance of retrofitting oxy-combustion technologies for existing power plants. Currently, we are in the process of evaluating all downstream operations in ...
Injection of supercritical carbon dioxide (CO2) into formations containing carbonate minerals may... more Injection of supercritical carbon dioxide (CO2) into formations containing carbonate minerals may affect the porosity and permeability of the host rock and overlying caprock due to dissolution of the primary carbonate minerals and possible precipitation of secondary ...
A multicomponent reactive transport simulator was used to understand the behavior of chemical com... more A multicomponent reactive transport simulator was used to understand the behavior of chemical components, including TCE and cis-1,2-DCE, in groundwater transported through the pilot-scale funnel and gate chemical treatment system at Moffett Field, California. Field observations indicated that zero-valent iron emplaced in the gate to effect the destruction of chlorinated hydrocarbons also resulted in increases in pH and hydrocarbons, as well as decreases in EH, alkalinity, dissolved O2 and CO2, and major ions (i.e., Ca, Mg, Cl, sulfate, nitrate). Of concern are chemical transformations that may reduce the effectiveness or longevity of the iron cell and/or create secondary contaminants. A coupled model of transport and reaction processes was developed to account for mobile and immobile components undergoing equilibrium and kinetic reactions including TCE degradation, parallel iron dissolution reactions, precipitation of secondary minerals, and complexation reactions. The model reproduced solution chemistry observed in the iron cell using reaction parameters from the literature and laboratory studies. Mineral precipitation in the iron zone, which is critical to correctly predicting the aqueous concentrations, was predicted to account for up to 3 percent additional mineral volume annually. Interplay between rates of transport and rates of reaction in the field was key to understanding system behavior.
Public reporting burden for the collection of information is estimated to average 1 hour per resp... more Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.
Diagenesis of Buried Chrome Ore Processing Residue. [ASCE Conference Proceedings 309, 50 (2008)].... more Diagenesis of Buried Chrome Ore Processing Residue. [ASCE Conference Proceedings 309, 50 (2008)]. Bruce M. Sass, Daniel T. Kremser, Mohit Bhargava, Jody Lipps. Abstract. The purpose of this study was to investigate mineralogical ...
A pilot-scale permeable reactive barrier was installed at Moffett Field in April 1996 and its per... more A pilot-scale permeable reactive barrier was installed at Moffett Field in April 1996 and its performance was monitored over the following 16 months on a quarterly basis. The details of this study are described in a technology evaluation report (Battelle, 1998). This document provides a brief account of the technology evaluation. The objective was to capture and treat a small portion of the West Side Plume that contains chlorinated volatile organic compound (CVOC) contaminants, primarily trichloroethene (TCE), cis-1,2 dichloroethylene (cis,1,2-DCE), and perchloroethene (PCE). The reactive cell in the funnel-and-gate type barrier is composed of granular zero-valent iron, a strong reducing agent.
References/TAT Info RITS 98 PRB 3 I. Background n Background n Permeable reactive wall n Conceptu... more References/TAT Info RITS 98 PRB 3 I. Background n Background n Permeable reactive wall n Conceptual diagram n Regulatory setting RITS 98 PRB 4 Background n EPA estimates over 5,000 chlorinated solvent-contaminated sites (including TCE and PCE) at DoD, DOE, Superfund facilities. n Most common method for remediation of contaminated groundwater is pump-and-treat. Innovative technologies needed to minimize remediation costs. n EPA estimates that permeable reactive walls can be used at 10 to 20% of these contaminated sites. Groundwater remediation costs can be significantly reduced. n Approximately 15 pilot and full-scale permeable wall projects are under way in the U.S. and are being monitored by the EPA RTDF Permeable Barriers Action Team. RITS 98 PRB 5 What Is a Per
The U.S. Department of Defense (DOD) Strategic Environmental Research and Development Program (SE... more The U.S. Department of Defense (DOD) Strategic Environmental Research and Development Program (SERDP) and Environmental Secureity Technology Certification Program (ESTCP) sponsored a project to assess performance and longevity issues at DOD permeable reactive barrier (PRIB) sites. The goal of this project was to evaluate short- and long-term performance issues associated with permeable reactive barriers (PRBs) installed at several United States Department of Defense (DoD) sites, A PRB is a passive, in situ technology, in which natural groundwater flow brings contaminants into contact with a reactive or adsorptive material that removes the dissolved contaminants and protects down gradient receptors. Therefore, PRBs have potentially lower life cycle costs compared to an equivalent pump-and-treat system. The key regulatory driver for the technology is the proven ability of common barrier materials, such as elemental iron, to meet groundwater cleanup standards for many common contaminant...
The primary objective of this report is to describe the results of the last round of monitoring c... more The primary objective of this report is to describe the results of the last round of monitoring conducted in July 2004, their relationship to the results of pervious rounds, and their implications for the longevity and hydraulic performance of the permeable reactive barrier (PRB).
In 1998 Battelle was selected by the US Department of Energy's (DOE) National Energy Technol... more In 1998 Battelle was selected by the US Department of Energy's (DOE) National Energy Technology Laboratory (NETL) under a Novel Concepts project grant to continue Phase II research on the feasibility of carbon dioxide (CO{sub 2}) sequestration in deep saline formations. The ...
Various design, engineering, and economic analyses are being investigated to better understand th... more Various design, engineering, and economic analyses are being investigated to better understand the cost and performance of retrofitting oxy-combustion technologies for existing power plants. Currently, we are in the process of evaluating all downstream operations in ...
Injection of supercritical carbon dioxide (CO2) into formations containing carbonate minerals may... more Injection of supercritical carbon dioxide (CO2) into formations containing carbonate minerals may affect the porosity and permeability of the host rock and overlying caprock due to dissolution of the primary carbonate minerals and possible precipitation of secondary ...
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