Sparging soil with air in order to remove contaminants, using a tube in which the flow resistance of the air leaving the tube decreases with depth

摘要

The flow resistance for the air leaving the tube (1) decreases with depth, so that the exit of air is essentially uniform over the entire tube height. A method for decontaminating soil comprises injecting air beneath the water table using a perforated vertical tube. The flow resistance for the air leaving the tube decreases with depth, so that the exit of air is essentially uniform over the entire tube height.