aquifer remediation Articles
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Optimization design based on ensemble surrogate models for DNAPLs-contaminated groundwater remediation
The optimization design of surfactant-enhanced aquifer remediation for dense non-aqueous phase liquids (DNAPLs)-contaminated groundwater is proposed through integrating simulation and optimization models. Many studies have demonstrated that the surrogate model is an effective tool for building a bridge between simulation and optimization models. In this paper, the simulation model was first ...
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WMU Field Course Preps Future Hydrogeologists with Hands-On Experience
Overview Students from around the country sign up for the Hydrogeology Field Course at Western Michigan University in order to gain experience with equipment and applications that will prepare them for the workplace in ways a textbook never could. Challenge In a competitive job market, it stands to reason that students who graduate with the most practical experience in their field will have an ...
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Adaptive Kriging surrogate model for the optimization design of a dense non-aqueous phase liquid-contaminated groundwater remediation process
The optimization model needs to call the simulation model to calculate the response under different conditions for many times, and this is computationally expensive and time-consuming. To solve this problem, surrogate models can be used to yield insight into the functional relationship between the design variables and the responses, instead of simulation models in the optimization. In this ...
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A mixed-integer non-linear programming with surrogate model for optimal remediation design of NAPLs contaminated aquifer
A mixed-integer non-linear programming (MINLP) with surrogate model was introduced to derive the optimal surfactant enhanced aquifer remediation (SEAR) process (remediation cost minimisation and removal rate maximisation) at a nitrobenzene-contaminated site. First, a 3D multi-phase flow simulation model was developed to simulate the SEAR process; using a radial basis function artificial neural ...
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Surfactant enhanced aquifer remediation (SEAR) using Ivey-sol surfactant technology
This paper will focus on the application of Ivey-sol non-ionic surfactant technology to improve the in-situ remediation of petroleum hydrocarbon contamination is soil and bedrock aquifers. Normally hydrophobic organic chemicals (HOC) exhibit limited solubility in groundwater as the contaminants tend to partition onto the soil and bedrock matrix. This partitioning can account for as much as ...
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CASE STUDY - Setup and calibration of a three-dimensional numerical multiphase model for design of in-situ remediation of jet fuel with surfactant
BACKGROUND Storage and pumping of jet-fuel have caused a severe contamination of soil and groundwater at a military facility in Denmark. The contamination was detected in 2001. The Danish Defence has conducted 3 a series of investigations and set up a skimmer system, that has recovered approximately 25 m of jetfuel. In 2005, the recovery stopped, and the remaining jet-fuel is trapped as a ...
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Method for remediation of aquifers
The US Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of contract F41624-99 C-8033 awarded by the United States Air Force Material Command. BACKGROUND OF THE INVENTION 1. Field of the InventionThis invention relates to the remediation of contaminated ...
By Redox Tech
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DNAPL Characterization Methods and Approaches, Part 1: Performance Comparisons
Contamination from the use of chlorinated solvents, often classified as dense nonaqueous phase liquids (DNAPLs) when in an undissolved state, represents an environmental challenge with global implications. Mass-transfer limitations due to rate-limited dissolution can lead to long-term aquifer persistence for even small volumetric fractions. The identification of DNAPL source zones located beneath ...
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Bentonite Slurry Construction Product Expertise with Economical Solutions - Case Study
Project Details Potash Corp Rocanville West Expansion Contractor: RECON Location Potash Corporation of Saskatchewan Inc. (Potash Corp) Products Used Premium Gel Bentonite Drilling Slurry and Additives Background: The Potash Corp Rocanville West Expansion Project was designed to increase the production capacity of the Rocanville potash mine. During the potash mining and ...
By CETCO
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Groundwater Remediation Strategies Tool
This guide provides strategies for focusing remediation efforts on 1) the change in contaminant mass flux in different subsurface transport compartments (e.g. the vadose zone, smear zone or a zone within an aquifer of interest) and 2) the change in remediation timeframe. In this approach, groundwater flow and contaminant concentration data are combined to estimate the rate of contaminant ...
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TerraStryke Erdenhanced Deep Aquifer cVOC Groundwater Remediation Evaluation Process Using Simple Additive Delivery Approach; NASA, Stennis Space Center Area D - CAse Study
TerraStryke Remediation Products LLC (TerraStryke) develop and distribute biostimulation additives proven to enhance any bioremediation project using low- impact, cost-effective biostimulation. Background: NASA Stennis Space Center, Passive Release Sock (PRS) Pilot Study. Evaluated additive efficacy under actual biogeochemical conditions. Past Site use impacted several groundwater bearing units ...
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Green remediation best management practices: pump and treat technologies
Overview Pump and treat (P&T) technology typically is selected in a cleanup remedy to hydraulically contain contamination and/or restore an aquifer to beneficial use. Opportunities to reduce the energy and environmental footprint of a P&T remedy, which are available during site characterization and the remedy selection, design, construction, and operation phases, rely on effective planning and ...
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Thermally Enhanced NAPL Recovery - Case Study
QED's AutoPump® Can Endure Tough Conditions to Deliver Superior Thermally Enhanced NAPL Recovery The site of a former U.S. Department of Energy (DOE) nuclear weapons production facility (the Pinellas Plant) in Largo, Florida posed an extreme challenge for groundwater remediation pumps. Soil and surficial aquifers at the site, now known as the Young-Rainey Science, Technology, and Research ...
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DOD evaluates bioaugmentation for remediating low-pH aquifers
The US Department of Defense (DOD) has completed pilot-scale work on the 'MAG-1' site at Fort Dix, NJ, to test suitability of anaerobic bioremediation for an aquifer with low pH. Project results will be used to design full-scale ground-water treatment at MAG-1. In addition, technical criteria gained from the demonstration will be integrated into DOD’s remediation strategy for its many facilities ...
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Perchlorate Remediation Project Case Study
ARCADIS was contracted in 2000 to lead the development, evaluation and selection of a final groundwater remedy for this 94-acre site in California. As part of this work, ARCADIS is also participating in the evaluation of innovative technologies with the potential to treat soil impacts in the multiple source areas across the site. Specifically, the project is focused on the remediation of seven ...
By Arcadis
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Stevens enhances groundwater remediation effectiveness - Case Study
The Stevens HydraProbe is now being used to monitor the progress of a new groundwater pollution clean up method called phytoremediation. Phytoremediation is the method by which trees are used to pull contamination out of groundwater. Remediation of contaminated aquifers can take many years to complete. The need for clean, healthy rivers, lakes and streams has stimulated ...
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What is Activated Carbon Filtration?
The process may have ancient roots, but still plays a role in modern water treatment Activated carbon filtration is one of many processes commonly used in water treatment to remove contaminants such as organic materials, and since it also can remove odor-causing contaminants, it’s often used to make drinking water more palatable. The first known carbon filtration devices date back to ...
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Spolchemie site remediation and NanoRem field site application
Site Remediation The Spolchemie site was chosen as one of the NanoRem case study sites, to test two types of nanoparticles (NPs) (zerovalent iron - nZVI and iron oxide NPs) for in situ remediation of BTEX (Benzene, Toluene, Ethylbenzene, and Xylenes) contamination. Nanoremediation was seen as an opportunity to enhance the in situ biodegradation of the BTEX contaminants and to reduce the current ...
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