Method based on the use of a gas mixture for sizing systems of gas diffusion in groundwater and evaluating the aquifer contamination

摘要

A method introducing improving elements compared with those used at present is disclosed, based on use of gas mixtures in order to size a system of gas diffusion in groundwater. Such a method allows to more precisely define the influence radius of an injection system, the real gas consumption and the time required for reclamation. The method is based on the propagation difference between a gas useful for remediation and an other gas and/or gases, which do not chemically or biologically react with the aquifer. The method allows to overcome the difficulties met at present during the sizing of an injection system of gas in groundwater. The techniques used till now have two important drawbacks: the first one is that they are based on punctual data, while the site of reclamation is a continuous system; the second one is that they are based on the partial analysis of the real chemical composition of contaminated groundwater.