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Full-Text Articles in Engineering
In Situ Enhanced Soil Mixing, Purdue Ect Team
In Situ Enhanced Soil Mixing, Purdue Ect Team
ECT Fact Sheets
In Situ Enhanced Soil Mixing (ISESM) is a remediation technology that has been used to remediate soils contaminated with volatile organic compounds (VOCs). The technology was developed by industry with the assistance of the U.S. Department of Energy’s Office of Science and Technology and the Office of Environmental Restoration.
Funnel & Gate System, Purdue Ect Team
Funnel & Gate System, Purdue Ect Team
ECT Fact Sheets
The limited success and high cost of traditional 'active' ground-water-contaminant plume management efforts (i.e., pump-and-treat systems) has stimulated a search for less expensive 'passive' plume interception and in-situ treatment technologies. The 'funnel and gate system,' which uses heterogeneous (surface-mediated) reactions on porous media to degrade dissolved contaminants, is one passive technology under consideration.
In Situ Remediation Using Horizontal Wells, Purdue Ect Team
In Situ Remediation Using Horizontal Wells, Purdue Ect Team
ECT Fact Sheets
Horizontal well technology has been widely used in petroleum and underground utility installation. Since late 1980's, the technology has been adapted for environmental remediation applications. Two general methods in drilling horizontal wells have been used in remediation, trenched and directionally-drilled. The first method involves the excavation of a relatively large diameter borehole, with simultaneous installation of well materials and backfill. The second method, directional drilling, produces a smaller diameter borehole and well materials are installed following the completion of drilling activities.
Jet-Grouting Constructed Laminar Diaphragms, Purdue Ect Team
Jet-Grouting Constructed Laminar Diaphragms, Purdue Ect Team
ECT Fact Sheets
The high cost of digging and hauling contaminated soil has made enclosure of the contaminated soil an alternative to prevent contamination of ground water and adjacent sites. The jet-grouting method uses special grout nozzles to create a grout sheet of controlled width and thickness from each drilled grout hole. This sheet is commonly 100 mm. to 150 mm. in thickness, 2 to 3 meters in width, and of any desired length. The width of the sheet in one pass can go up to 6 meters. Actual lateral soil penetration of the grout jets is a function of the nature of …
Extraction Of Contaminated Soil Using High Pressure Jet Grouting, Purdue Ect Team
Extraction Of Contaminated Soil Using High Pressure Jet Grouting, Purdue Ect Team
ECT Fact Sheets
Removal of contaminated soil underneath existing structures causes settlement. There is a need for a remediation technology that eliminates this problem. The jet grouting by the triple rod system can be combined with an on site remediation technology (e.g., soil washing). Jet grouting was developed primarily for underpinning and/or excavation support. The benefits of this technology lie in the future reduction of structural settlement, and site access flexibility.
Glass Diaphragm Walls, Purdue Ect Team
Glass Diaphragm Walls, Purdue Ect Team
ECT Fact Sheets
The materials currently applied to confine contaminated soils are not the best solution (ex. slurry walls). A new contaminant confining material is presented where the costs of digging and hauling the contaminated soil are eliminated. For contaminant enclosure, the new technology incorporates a diaphragm wall system consisting of special glass panels with a sealing made out of glass.
In-Situ Vitrification, Purdue Ect Team
In-Situ Vitrification, Purdue Ect Team
ECT Fact Sheets
While landfills are the predominant form of solid-waste disposal for municipalities in the U.S., people are objecting to the establishment of new landfills in their communities. Decreasing availability of land, worries about potential health problems and a growing concern for the environment have made the disposal of solid waste a challenge. This technology represents a safety improvement. There is no need for contaminated soil transportation and handling. The need for disposal landfills disappears. Any type of radioactively contaminated buried waste unit, which because of its high activity represents significant risk for exhumation and re-disposal, would be a potential application for …
Ehydraulic Pneumatic Fracturing, Purdue Ect Team
Ehydraulic Pneumatic Fracturing, Purdue Ect Team
ECT Fact Sheets
The technology is an enhancement process designed for integration with primary in-situ treatment technologies such as vapor extraction, bioremediation, thermal treatment, and 'pump and treat'. Fractures in dense soils are created, using hydraulic or pneumatic methods, making existing fractures larger to get at contaminants and allowing a more effective distribution of the extractive air throughout the soil. Pneumatic Fracturing was jointly developed by Accutech Remedial Systems Inc. and the New Jersey Institute of Technology. It involves the injection of air (or another gas) into a contaminated geologic formation at sufficient pressure and flow rate to create artificial fractures or to …
Plasma Arc Torch Technology Stabilization And Ground Improvement, Purdue Ect Team
Plasma Arc Torch Technology Stabilization And Ground Improvement, Purdue Ect Team
ECT Fact Sheets
This technology represents an additional alternative for stabilizing weak foundation soils upon which buildings, bridges, roads or other structures are to be constructed. A plasma is a gas that has been ionized by the electric arc of a plasma torch and can therefore respond to electrical and magnetic fields. Plasma arc technology can create plasma using almost any type of gas (oxygen, nitrogen, carbon monoxide, air, etc.) and in a wide range of pressures (vacuum to 20 atmospheres).