Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"pump-and-treat"”.
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Optimization study of a pump-and-treat system at Massachusetts Military Reservation
… Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.
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Performance assessment of capture zones generated by PV-powered pump and treat systems
"Pump and treat (P&T) is a technology that has been extensively used to remove and/or contain contaminated groundwater. Hydraulic containment of contaminants is accomplished by generating capture zones through pumping of groundwater. An appropriate delineation of capture zones is necessary to …
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Impact of nonideal transport upon the effectiveness of pump-and-treat groundwater remediation: A computational investigation
The impact of various nonidealities affecting pump and treat remediation was analyzed using numerical simulations. In particular, the effect of the following important non-idealities was investigated: spatial variability of hydraulic conductivity (K-field heterogeneity), spatial variability of …
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Use of the self-potential method for measurement of subsurface water flow at a pump-and-treat remediation site
… surveying has been widely used in environmental and engineering applications, primarily for rough but inexpensive assessment of subsurface flow of fluids, heat, or ions. In this project, the SP method was employed to study the activity at an environmental cleanup site at the Massachusetts …
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Evaluation of recirculating well technology with a cost comparison to pump and treat technology for containment of the CS-10 contaminant plume at the Massachusetts Military Reservation
… Institute of Technology, Department of Civil and Environmental Engineering, 1997
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Solubilization of volatile organic compounds in edible nonionic surfactants
… (VOCs) are major subsurface contaminants and exist as Non-Aqueous Phase Liquids (NAPLs) in the subsurface. Pump-and-treat remediation is the most common technology used to remediate contaminated groundwater. However, experience has revealed that the traditional pump-and-treat remediation …
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Understanding The Factors Influencing Contaminant Attenuation And Plume Persistence
… by analysis of historical groundwater-withdrawal and contaminant-concentration data collected from long-term pump-and-treat operations. The potential factors contributing to plume persistence are generally recognized to include incomplete isolation of the source zone, permeability heterogeneity, …
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Utilization of predispersed solvent extraction for removal and enzymatic degradation of chlorinated solvents in ground water
… Solvent Extraction (PDSE) in an <i>ex situ</i> pump-and-treat system to remove trace amounts of dissolved chlorinated solvents like perchloroethylene (PCE) and trichloroethylene (TCE) from contaminated ground water has been investigated. In PDSE, the solvent is comminuted into globules with …
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Laboratory and Field Studies Directed toward Accelerating Arsenic Remediation at a Major US Superfund Site in New Jersey
… groundwater by conventional methods, i.e. pump and treat (P&T), can be impeded by slow desorption of As from Fe and Al (hydr)oxides in aquifer solids. Through experimentation at different physical scales (grain, bench, and field scale), the potential for chemical additions to increase As …
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Design of the surfactant enhanced electrokinetic system for hydrocarbons removal from clayey soils in pilot scale conditions
In soils rich with humus, natural organic matter, and clayey fractions, the partition of hydrophobic organic compounds (HOCs) to the solid phase is much higher than to the aqueous phase. This fact can be related to their sorption on organic fraction of soil, and their higher affinity to the clayey …
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Determining capture zones for three-dimensional, heterogeneous, anisotropic aquifers by Monte Carlo analysis
Most methods of delineating capture zones for pump-and-treat remedial design and wellhead protection assume a two-dimensional, homogeneous aquifer. Aquifers, however, are three-dimensional and heterogeneous, thereby introducing uncertainty in capture zone analysis. This study used a Monte Carlo …
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Factors Affecting Hydraulic Conductivity of High pH, High Silica Groundwater at the Former Occidental Chemical Corporation Facility
Pollution of water and sediments in and along the Port of Tacoma, WA, has resulted from the historic discharge of chlorinated solvents and caustic materials from the former Occidental Chemical Corporation (OCC) Facility. A pump-and-treat (P&T) system is in operation, yet the extraction of …
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A Fundamental Investigation of Well Injection Depth Extraction (WIDE) System Performance Aspects in Fine-Grained Soil Contaminated with Trichloroethylene
… field demonstration, laboratory experimentation, and finite element analysis. Global WIDE system performance (in-situ ground water and contaminant transport) was investigated during the field demonstration, PVW performance was examined during laboratory experimentation, and contaminant …
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A microcosm study of the biodegradability of adsorbed toluene by acclimated bacteria in soils
… for detrimental health effects is substantial and has been addressed by the environmental engineering profession. Typically, contaminated groundwater is pumped to the surface and treated in a variety of methods including air stripping, carbon adsorption, and biodegradation. In situ …
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Impact of Source Zone and Pumping Well Orientation on Dissolved Contaminant Dilution Factor
… of the source contaminant is closely examined and monitored. The dilution factor is the ratio of the contaminant concentration in the pumped water over the contaminant source concentration (assumed to be constant) in a pump-and-treat setup. It is important because it provides critical …
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Barriere reattive permeabili a ferro zerovalente: modellazione dei fenomeni di trasporto e degradazione multicomponente
… essere una valida alternativa all’utilizzo del pump and treat. Il principio di funzionamento di un barriera reattiva permeabile è relativamente semplice: del materiale reattivo permeabile viene posto all’interno del sistema acquifero in modo da essere attraversato dall’acqua contaminata che si …
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Bioremediation of petroleum hydrocarbons using microbial fuel cells
… fuel cells (MFCs) could be employed in the treatment of these environmental pollutants with concomitant bioelectricity generation. Therefore, the overarching objective of this study was to develop an MFC system for the effective and efficient treatment of petroleum hydrocarbons in both …
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Natural Attenuation Software (NAS): Assessing Remedial Strategies and Estimating Timeframes
… contaminant concentrations to regulatory limits, and to assist in decision-making on the level of source zone treatment in conjunction with MNA using site-specific remediation objectives. In addition, NAS facilitates the combined use of MNA with engineered remedial actions (ERAs) so that the …
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A Non-isolated Half Bridge Buck-based Converter For Vrm Application And Small Signal Modeling Of A Non-conventional Two Phase Bu
This dissertation is about treatment of the nonbiodegradable organic content of landfill leachate by chemical oxidation combined with biological treatment. It is divided into three parts. In the first part, ferrate was compared to Fenton's reagent for the purpose of removing non-biodegradable …
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