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Long-Term Monitoring of Permeable Reactive Barriers - Progress Report

Description: The purpose of this project is to conduct collaborative research to evaluate and maximize the effectiveness of permeable reactive barriers (PRBs) with a broad-based working group including representatives from the U.S. Department of Energy (DOE), U.S. Department of Defense (DoD), and the U.S. Environmental Protection Agency (EPA). The Naval Facilities Engineering Service Center (NFESC) and its project partner, Battelle, are leading the DoD effort with funding from DoD's Environmental Security T… more
Date: April 12, 2001
Creator: Liang, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Degradation of polychlorinated biphenyls (PCBs) using palladized iron

Description: Contamination from polychlorinated biphenyls (PCBs) is a persistent problem within the Department of Energy complex, as well as in numerous industrial sites around the US. To date, commercially available technologies for destroying these highly stable compounds involve degradation at elevated temperatures either through incineration or base-catalyzed dehalogenation at 300{degrees}C. Since the heating required with these processes substantially increases the costs for treatment of PCB-contaminat… more
Date: June 1, 1996
Creator: West, O.R.; Liang, L. & Holden, W.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The X-625 Groundwater Treatment Facility: A field-scale test of trichloroethylene dechlorination using iron filings for the X-120/X-749 groundwater plume

Description: The dehalogenation of chlorinated solvents by zero-valence iron has recently become the subject of intensive research and development as a potentially cost-effective, passive treatment for contaminated groundwater through reactive barriers. Because of its successful application in the laboratory and other field sites, the X-625 Groundwater Treatment Facility (GTF) was constructed to evaluate reactive barrier technology for remediating trichloroethylene (TCE)-contaminated groundwater at the Port… more
Date: September 1, 1997
Creator: Liang, L.; West, O. R. & Korte, N. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Degradation of trichloroethylene (TCE) and polychlorinated biphenyls (PCBs) by Fe and Fe-Pd bimetals in the presence of surfactants and cosolvents

Description: Surfactants and cosolvents are being used to enhance the removal of dense non-aqueous phase liquids (DNAPL) such as trichloroethylene (TCE) and polychlorinated biphenyls (PCBS) from contaminated soils. However, the waste surfactant solution containing TCE and PCBs must be treated before it can be disposed. This study evaluated the use of zero-valence iron and palladized iron fillings on the dechlorination of TCE and a PCB congener in a dihexylsulfosuccinate surfactant solution. Batch experiment… more
Date: February 1, 1997
Creator: Gu, B.; Liang, L.; West, O.R.; Cameron, P. & Davenport, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Colloid transport and retention in fractured deposits. 1998 annual progress report

Description: 'The goal of the DOE project is to identify the chemical and physical factors that control the transport of colloids in fractured formations, and develop a generalized capability to predict colloid attachment and detachment based on hydraulic factors (head, flow rate), physical structure (fracture aperture), and chemical properties (surface properties of colloids and fracture surfaces). The research approach targets multiple scales, including: (a) a theoretical description of colloid dynamics i… more
Date: June 1, 1998
Creator: McCarthy, J.F.; Mckay, L.D.; Liang, L.; Ibaraki, Motomu & Reimus, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Front-Side Silver Metallization on Underlying n+-p Junction in Multicrystalline Silicon Solar Cells: Preprint

Description: We report on the effect of front-side Ag metallization on the underlying n+-p junction of multicrystalline Si solar cells. The junction quality beneath the contacts was investigated by characterizing the uniformities of the electrostatic potential and doping concentration across the junction, using scanning Kelvin probe force microscopy and scanning capacitance microscopy. We investigated cells with a commercial Ag paste (DuPont PV159) and fired at furnace setting temperatures of 800 degrees, 8… more
Date: June 1, 2012
Creator: Jiang, C. S.; Li, Z. G.; Moutinho, H. R.; Liang, L.; Ionkin, A. & Al-Jassim, M. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

In Situ Remediation Integrated Program. In situ physical/chemical treatment technologies for remediation of contaminated sites: Applicability, developing status, and research needs

Description: The U.S. Department of Energy (DOE) In Situ Remediation Integrated Program (ISR IP) was established in June 1991 to facilitate the development and implementation of in situ remediation technologies for environmental restoration within the DOE complex. Within the ISR IP, four subareas of research have been identified: (1) in situ containment, (2) in situ physical/chemical treatment (ISPCT), (3) in situ bioremediation, and (4) subsurface manipulation/electrokinetics. Although set out as individua… more
Date: June 1, 1994
Creator: Siegrist, R. L.; Gates, D. D.; West, O. R.; Liang, L.; Donaldson, T. L.; Webb, O. F. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A field trial of novel bifunctional resins for removing pertechnetate (TcO{sub 4}{sup {minus}}) from contaminated groundwater

Description: A field trial using a custom-designed bifunctional synthetic resin prepared at the University of Tennessee and designed to selectively remove pertechnetate (TcO{sub 4}{sup {minus}}) from groundwater was conducted in summer 1997 at the Northwest Plume Pump-and-Treat Facility at the US Department of Energy`s Paducah Gaseous Diffusion Plant (PGDP) site. The bifunctional resin, RO-02-119, was a copolymer of vinylbenzylchloride and divinylbenzene that had been functionalized with trihexylamine and t… more
Date: March 1, 1998
Creator: Gu, B.; Liang, L.; Brown, G. M.; Bonnesen, P. V.; Moyer, B. A.; Alexandratos, S. D. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

In situ treatment of mixed contaminants in groundwater: Application of zero-valence iron and palladized iron for treatment of groundwater contaminated with trichloroethene and technetium-99

Description: The overall goal of this portion of the project was to package one or more unit processes, as modular components in vertical and/or horizontal recirculation wells, for treatment of volatile organic compounds (VOCs) [e.g., trichloroethene (TCE)] and radionuclides [e.g., technetium (Tc){sup 99}] in groundwater. The project was conceived, in part, because the coexistence of chlorinated hydrocarbons and radionuclides has been identified as the predominant combination of groundwater contamination in… more
Date: April 1, 1997
Creator: Korte, N. E.; Muck, M. T.; Zutman, J. L.; Schlosser, R. M.; Liang, L.; Gu, B. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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