DE4111585A1 - Determn. of the distribution of gaseous or liq. mediums in ground - by enriching medium with inert gas and taking analytical samples through boreholes - Google Patents

Abstract

A process for supervising the distribution of a liq. or gaseous medium present in or introduced into the ground, esp. a cleansing agent introduced into ground which is contaminated with harmful materials, comprises enriching the medium with an inert gas and measuring its distribution by way of boreholes made in the ground for analytical purposes. USE/ADVANTAGE - The process is esp. useful for determn. of the distribution of cleaning liqs. e.g. organopolysiloxanes introduced into the ground to cleanse the soil e.g. in the case of contamination of the soil with oil or oil- or hydrocarbon-contg. substances, e.g. as a result of leakage during transport. Introduction of an inert gas such as helium or nitrogen into the cleansing agent before it is introduced into the ground allows the progress of the cleansing agent through the soil to be determined by drilling boreholes at various points distant from the point of entry of the cleaning agent into the soil, and analysing the samples obtd. for their content of the inert gabu

Description

The invention relates to a method for checking the distribution of one in the ground or in the ground richly introduced liquid or gaseous medium, esp especially one in an earth contaminated with pollutants rich detergent brought in.

For example, in the event of accidents involving tanker vehicles that have oil, oil or transport hydrocarbonaceous substances, it can happen that the transport container contains a leak over which is the oil or the oil or hydrocarbon Fabric can leak. It cannot be ruled out that the transported substance gets into the ground and that it is contaminated over a larger area.

To decontaminate such a soil is from the DE-OS 37 39 126 discloses a method in which the unun cleaned a washing liquid into the soil is directed. This washing liquid absorbs on its way from top to bottom the damage that has penetrated into the earth substances and becomes below the contaminated earth area abge at least one, mostly centrally arranged suction shaft pulled. Then the one loaded with the pollutants Washer fluid conveyed upwards, there from the pollutant fen cleaned and mostly again in the ground directs. Because the spread of pollutants in the ground does not  The cleaning process can be determined accurately Security reasons mostly over a considerably larger area carried out what with not inconsiderable additional costs connected is. Of course, it can also occur that the contaminated area of the earth is not completely covered and is cleaned. This is because the exact Do not determine the distribution of the washing liquid in the soil is cash.

Also when creating dispersion calculations from Me service in the underground or in the ground can never be determined exactly, with what permeability the individual soil layers absorb a diffusion medium. So there are pollutants, Infiltration flags and load flags do not clearly follow assign, so that in many cases not exactly correspond to the geological conditions can be reacted to.

The invention is therefore based on the object of a method with which the distribution of a soil liquid or into the soil or into the soil gaseous medium can be checked.

To solve this problem, according to the invention in a Proposed methods of the type described at the outset, that the medium is enriched with an inert gas and its Distribution over analysis holes in the ground is measured.

Simply by adding a small dose of an inert Gases into a liquid, water or diffusion or cleaning solution, these media are enriched with the in gas. After entering into the groundwater or into the Soil can be created by the natural spread of the Me diums itself or in connection with the groundwater within  the flow or distribution properties in a very short time to prove this media. For this, Boh into the soil through which the soil air, the groundwater or the cleaning medium removed and through an analysis of the content of the inert gas is established. This means pollutant flags, insurance flags and Bela Flag flags can be clearly demonstrated, so that within a short time correct according to the geological conditions can be reacted to.

Further features of a method according to the invention are in claims 2-8.

The invention is described below using an exemplary embodiment les explained in more detail.

It is assumed that an earth area up to one certain depth with oil or oil or hydrocarbon Pollutants is contaminated. To decontaminate this soil area is in the same via diffusion shafts or special their drainage devices used a liquid washing or cleaning agent tel washed in, which consists of an organopolysiloxane or a Organopolysiloxane mixture exists. This washing or cleaning supply liquid is first, for example, still in one barrel-like containers with an inert gas, for example He lium, enriched. Helium or noble gases have the property that they are completely inert and have no connection with others Enter fabrics. As a result, their presence in an Ana easy to determine lysis. When using helium poses a degree of saturation of 5 ppm appears after a short time. After that this helium-enriched mixture is diffused sion shafts, the drainage pipe or via special diffusion ion lances introduced into the contaminated soil or  pressed in. After the initiation of this detergent who different from the earth ram core probes taken from soil air samples from which the diff well-founded helium of the washing or cleaning liquid pro is easily detectable. This allows the flow to be very precise localized away from the washing or cleaning liquid, turned on circles and be understood. This is a targeted Diffusion of the washing or cleaning liquid possible and can be monitored, with undesired outflow factors con trolled and can thus be avoided.

In a modification of the illustrated embodiment, the ses method with other, especially gaseous rice cleaning agents feasible. As an inert gas here too Nitrogen can be used, which is in the existing tem temperatures are also completely inert.

Claims (8)

1. A method for checking the distribution of a liquid or gaseous medium located in the ground or introduced into the ground, in particular a cleaning agent introduced into a soil contaminated with pollutants, characterized in that the medium is enriched with an inert gas and its distribution via analysis bores is measured in the ground. 2. The method according to claim 1, characterized, that the medium or cleaning agent before being introduced into the earth is enriched with the inert gas. 3. The method according to claim 1 or 2, characterized, that the medium with about 0.5 to 10 g per cubic meter with the inert gas is enriched. 4. The method according to claim 1 or 2, characterized, that the medium to the degree of saturation with the inert gas is enriched. 5. The method according to at least one of claims 1-4, characterized, that an inert gas is used as the inert gas.   6. The method according to claim 5, characterized, that helium is used as the noble gas. 7. The method according to at least one of claims 1-4, characterized, that nitrogen is used as the inert gas. 8. The method according to at least one of claims 1-7, characterized, that as a cleaning agent a liquid organopolysiloxane is used.