scholarly journals Acceleration of groundwater remediation by deep sweeps and vortex ejections induced by rapidly pulsed pumping

2016 ◽  
Vol 52 (5) ◽  
pp. 3930-3940 ◽  
Author(s):  
David M. Kahler ◽  
Zbigniew J. Kabala
Keyword(s):  
Groundwater Remediation ◽  
Pulsed Pumping

scholarly journals Rapidly Pulsed Pumping Accelerates Remediation in A Vertical Circulation Well Model

Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1423 ◽  
Author(s):  
David Kahler
Keyword(s):  
Groundwater Remediation ◽  
Sudden Increase ◽  
Vertical Circulation ◽  
Duration Of Treatment ◽  
Capital Costs ◽  
Pulsed Flow ◽  
Dead End ◽  
Sudden Decrease ◽  
Dynamics Models ◽  
Pulsed Pumping

One factor that slows groundwater remediation is the sequestration of contaminant in dead-end pores, that is, pores that are not flushed through by flow through the aquifer. Furthermore, rebound of apparently remediated aquifers can occur as a result of the eventual release of the contaminant trapped in these dead-end pores. Since the operational costs generally outweigh the capital costs of a remediation project, reduction of the duration of treatment should reduce the overall cost of the average remediation. It has been shown that a rapidly pulsed flow can increase the mixing between dead-end and well-connected pores through computational fluid dynamics models with idealized pore geometry and column tests. A rapidly pulsed flow induces a deep sweep upon a sudden increase in velocity and a vortex ejection upon a sudden decrease in velocity that substantially accelerates the remediation of contaminant from these dead-end pores. To examine rapidly pulsed pumping in a more realistic configuration, a model vertical circulation well was constructed. The porous medium was well-sorted crushed glass to minimize sorption. Removal of a fluorescent dye, which represents a dissolved contaminant, under a rapidly pulsed flow was compared to a steady flow. The modeled well revealed accelerated removal of dissolved contaminants under a rapidly pulsed flow.

A reactor model for pulsed pumping groundwater remediation

2004 ◽  
Vol 38 (18) ◽  
pp. 3869-3880 ◽  
Author(s):  
C.M. Tenney ◽  
C.M. Lastoskie ◽  
M.J. Dybas
Keyword(s):  
Groundwater Remediation ◽  
Reactor Model ◽  
Pulsed Pumping

Pilot plant results for groundwater remediation at the former gas works site ‘Leopoldau’ in Vienna, Austria

2006 ◽  
Vol 14 (2) ◽  
pp. 630-633 ◽  
Author(s):  
W. Fuchs ◽  
T. Wirthensohn ◽  
W. Wittmann ◽  
P. Schoeberl
Keyword(s):  
Pilot Plant ◽  
Groundwater Remediation

EURODEMO - improving the uptake of efficient soil and groundwater remediation technologies

2009 ◽  
Vol 17 (3) ◽  
pp. 685-692
Author(s):  
Yvonne Spira ◽  
David Edwards ◽  
John Henstock ◽  
Hervé Gaboriau ◽  
Corinne Merly ◽  
...  
Keyword(s):  
Groundwater Remediation

Assessing Alternative Endpoints for Groundwater Remediation at Contaminated Sites

2011 ◽  
Author(s):  
Rula Deeb ◽  
Elisabeth Hawley ◽  
Lauren Kell ◽  
Robert O'Laskey
Keyword(s):  
Groundwater Remediation ◽  
Contaminated Sites

scholarly journals Zero-Valent Iron Nanoparticles for Soil and Groundwater Remediation

2020 ◽  
Vol 17 (16) ◽  
pp. 5817
Author(s):  
Alazne Galdames ◽  
Leire Ruiz-Rubio ◽  
Maider Orueta ◽  
Miguel Sánchez-Arzalluz ◽  
José Luis Vilas-Vilela
Keyword(s):  
Contaminated Soils ◽  
Groundwater Remediation ◽  
Iron Nanoparticles ◽  
Environmental Issues ◽  
High Specific Surface Area ◽  
Zero Valent Iron ◽  
Pilot Studies ◽  
High Effectiveness ◽  
Nanosized Materials ◽  
Zero Valent Iron Nanoparticles

Zero-valent iron has been reported as a successful remediation agent for environmental issues, being extensively used in soil and groundwater remediation. The use of zero-valent nanoparticles have been arisen as a highly effective method due to the high specific surface area of zero-valent nanoparticles. Then, the development of nanosized materials in general, and the improvement of the properties of the nano-iron in particular, has facilitated their application in remediation technologies. As the result, highly efficient and versatile nanomaterials have been obtained. Among the possible nanoparticle systems, the reactivity and availability of zero-valent iron nanoparticles (NZVI) have achieved very interesting and promising results make them particularly attractive for the remediation of subsurface contaminants. In fact, a large number of laboratory and pilot studies have reported the high effectiveness of these NZVI-based technologies for the remediation of groundwater and contaminated soils. Although the results are often based on a limited contaminant target, there is a large gap between the amount of contaminants tested with NZVI at the laboratory level and those remediated at the pilot and field level. In this review, the main zero-valent iron nanoparticles and their remediation capacity are summarized, in addition to the pilot and land scale studies reported until date for each kind of nanomaterials.

scholarly journals Groundwater Remediation of Volatile Organic Compounds Using Nanofiltration and Reverse Osmosis Membranes—A Field Study

Membranes ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 61
Author(s):  
Thomas J. Ainscough ◽  
Darren L. Oatley-Radcliffe ◽  
Andrew R. Barron
Keyword(s):  
Reverse Osmosis ◽  
Groundwater Remediation ◽  
Operating Pressure ◽  
Significant Extent ◽  
Groundwater Samples ◽  
Volatile Organic ◽  
Microfiltration Membranes ◽  
The Subject ◽  
A Site ◽  
Initial Results

Groundwater contamination by chlorinated hydrocarbons represents a particularly difficult separation to achieve and very little is published on the subject. In this paper, we explore the potential for the removal of chlorinated volatile and non-volatile organics from a site in Bedfordshire UK. The compounds of interest include trichloroethylene (TCE), tetrachloroethylene (PCE), cis-1,2-dichloroethylene (DCE), 2,2-dichloropropane (DCP) and vinyl chloride (VC). The separations were first tested in the laboratory. Microfiltration membranes were of no use in this separation. Nanofiltration membranes performed well and rejections of 70–93% were observed for synthetic solutions and up to 100% for real groundwater samples. Site trials were limited by space and power availability, which resulted in a maximum operating pressure of only 3 bar. Under these conditions, the nanofiltration membrane removed organic materials, but failed to remove VOCs to any significant extent. Initial results with a reverse osmosis membrane were positive, with 93% removal of the VOCs. However, subsequent samples taken demonstrated little removal. Several hypotheses were presented to explain this behavior and the most likely cause of the issue was fouling leading to adsorption of the VOCs onto the membrane and allowing passage through the membrane matrix.

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