Browse Prior Art Database

Method of Cleaning Contaminated Soil

IP.com Disclosure Number: IPCOM000046654D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Haag: AUTHOR

Abstract

Accidentally contaminated soil, containing volatile solvents, such as chlorinated hydrocarbons, can be cleaned as follows. A tubing 2 is inserted through a borehole into a contaminated area 1 and sealed at the surface with a seal 3 of plastic, concrete or another suitable material. Tubing 2, which may be perforated, is shunted by two manually operated valves and a gas measuring cell 5, which can be disconnected and removed for analyzing solvents contained in the air. An active carbon filter 6, coupled to a suction pump 8, is connected to tubing 2. Vacuum meter 7 serves to measure the pressure in the system. The reduced pressure in tubing 2 accelerates the transport and directional diffusion of solvent vapors to the borehole from where they are removed with the air flow.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 94% of the total text.

Page 1 of 2

Method of Cleaning Contaminated Soil

Accidentally contaminated soil, containing volatile solvents, such as chlorinated hydrocarbons, can be cleaned as follows. A tubing 2 is inserted through a borehole into a contaminated area 1 and sealed at the surface with a seal 3 of plastic, concrete or another suitable material. Tubing 2, which may be perforated, is shunted by two manually operated valves and a gas measuring cell 5, which can be disconnected and removed for analyzing solvents contained in the air. An active carbon filter 6, coupled to a suction pump 8, is connected to tubing 2. Vacuum meter 7 serves to measure the pressure in the system. The reduced pressure in tubing 2 accelerates the transport and directional diffusion of solvent vapors to the borehole from where they are removed with the air flow. The vapor concentrations in the sucked-out air can be measured by gas- measuring cell 5, using gas chromatographic methods. The cleaned air is discharged through exhaust 9 into the atmosphere. The active carbon filter is provided with replaceable cartridges of 20 to 40 liters which can be treated in a central regeneration and recycling plant for recovering the solvents or they can be treated as industrial waste and burned. The method is particularly suitable for cleaning narrow areas with regard to their lateral dimensions. Its main advantage is that it can be used at once for solvent spills, particularly of volatile chlorinated hydrocarbons underneath concrete...