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.
Results
Showing 1 to 20 of 43 for “"groundwater remediation"”.
-
Wind power applications to groundwater remediation
"The use of renewable energy systems to power groundwater remediation systems seems like an inherently good idea because of potential cost savings and environmental benefits associated with reduced greenhouse gas emissions. Small wind turbine systems marketed for single residence applications may …
-
Engineering palladium-on-gold bimetallic nanoparticles as groundwater remediation catalysts
Over the years, our groundwater sources have become contaminated with chlorinated organics, in particular trichloroethene (TCE) due to its exposure as a solvent to degrease metals and electronic parts in the automotive, metals, and electronic industries. Due to its prevalence and toxicity, TCE has …
-
Development and Characterization of Controlled-Release Permanganate Gelfor Groundwater Remediation
… to remediate large, dilute plumes of DNAPLs in groundwater through the in-situ, well-based emplacement of concentrated permanganate solution mixed with a gelling agent. The controlled-release permanganate gel (CRP-G) solution was developed so that it may be injected and flow with groundwater and …
-
Optimizing Groundwater Remediation Designs Using Dynamic Meta-Models and Genetic Algorithms
… expected outputs. The method was applied to two remediation case studies, where the primary source of uncertainty stems from hydraulic conductivity values in the aquifers. The results show that the technique can lead to far more reliable solutions with significantly less computational effort.
-
A Self -Adaptive Hybrid Genetic Algorithm for Optimal Groundwater Remediation Design
… of the e-SAHGA algorithm to a hypothetical groundwater remediation design problem showed 90% reliability in identifying the solution faster than the SGA, with average savings of 64% across 100 runs with different random initial populations. Finally, e-SAHGA was tested on a field-scale …
-
Computational Tools for Improved Analysis and Assessment of Groundwater Remediation Sites
Remediation of contaminated groundwater remains a high-priority national goal in the United States. Water is essential to life, and new sources of water are needed for an expanding population. Groundwater remediation remains a significant technical challenge despite decades of research into this …
-
Studies of hydrophobic organic pollutant interactions with cyclodextrin: implication for groundwater remediation
Henry’s Law constants of several common, subsurface hydrophobic organic pollutants (HOPs) including trichloroethylene (TCE), perchloroethylene (PCE) and benzene, toluene, ethylbenzene and o-xylene (BTEX), were measured over a range of temperatures (35, 45, 55 and 65°C) and cyclodextrin (CD) …
-
Compatibility and effectiveness of polymer-enhanced chemical oxidation and reductive dechlorination groundwater remediation strategies
Includes bibliographical references (pages 167-176).
-
Investigations on mobility of carbon colloid supported nanoscale zero-valent iron (nZVI) for groundwater remediation
Injection of nanoscale zero-valent iron (nZVI) is an innovative technology for in situ installation of a permeable reactive barrier in the subsurface. Zerovalent iron (ZVI) is highly reactive with chlorinated hydrocarbons (CHCs) and renders them into less harmful substances. Application of nZVI …
-
The dual impact of colloidal particles in the environment: emerging contaminants and groundwater remediation agents
L'abstract è presente nell'allegato / the abstract is in the attachment
-
Impact of nonideal transport upon the effectiveness of pump-and-treat groundwater remediation: A computational investigation
… 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 sorption …
-
A neural network-based method for evaluating a spatially distributed parameter field: An application in groundwater remediation under uncertainty
… is an important issue in the design of reliable groundwater remediation strategies. Using groundwater management models based on a stochastic approach to groundwater flow, where the log-hydraulic conductivity is represented as a random field, is a frequently studied technique for the design of …
-
Numerical Simulation of Multiphase Flow in Fractured Porous Media
… a significant influence on process behavior in groundwater remediation, reservoir engineering and safety analysis for waste repositories. We present a finite volume method for the numerical solution of the multiphase flow equations in fractured porous media. The capillary pressure is treated by …
-
Characterization of Magnetite Nanoparticle Reactivity in the Presence of Carbon Tetrachloride
… the United States, there are a large number of groundwater systems contaminated by chlorinated organic compounds. Of these compounds, carbon tetrachloride (CT) is one of the most frequently encountered due to its past, widespread industrial use. In anaerobic groundwater environments, CT has been …
-
Characteristics and Mechanisms of Heavy Metal and MTBE Adsorption on Zeolites and Applications in Permeable Reactive Barriers
Groundwater contamination is a grave matter of concern due to its risks to the environment and human health caused by various inorganic and organic pollutants. A wide range of treatment technologies have been developed for groundwater remediation. Permeable reactive barriers (PRBs) filled with …
-
Sensitivity Constrained Nonlinear Programming: A General Approach for Planning and Design Under Parameter Uncertainty and an Application to Treatment Plant Design
… is important, e.g., the design of contaminated groundwater remediation schemes.
-
Microorganisms and Functional Genes Associated with Cometabolic Degradation of 1,4-Dioxane in Biologically-Active Carbon Biofilters Applied for Potable Reuse Treatment
… degradation of 1,4-dioxane has been achieved in groundwater remediation by stimulating bacteria carrying cyclic ether-degrading soluble diiron monooxygenases (SDIMOs) through the addition of simple alkane gases, such as propane. A recent pilot-scale study demonstrated that addition of such …
-
Performance assessment of capture zones generated by PV-powered pump and treat systems
… 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 design an effective P&T system. P&T systems conventionally …
-
Bayesian Saltwater Intrusion Prediction and Remediation Design under Uncertainty
Groundwater resources are vital for sustainable economic and demographic developments. Reliable prediction of groundwater head and contaminant transport is necessary for sustainable management of the groundwater resources. However, the groundwater simulation models are subjected to uncertainty in …
-
Isotopic study of uranium: determining the isotopic fractionation of uranium during abiotic reduction with iron(II)
… of interest due to its toxicity and mobility in groundwater. It is a redox active element in which the oxidation state can change by the addition or removal of electrons. In one method of groundwater remediation, mobile, hexavalent uranium (U(VI)) can be reduced to immobile, tetravalent uranium …
Page 1 of 3