A process for removing volatile contaminants from flowing groundwater on a substantially continuous basin, comprises placing a tube 3 in the ground in the path of the flowing groundwater, the tube 3 being such that it allows water through its walls, and bubbling compressed gas through a head 7 into the water to carry the contaminants to the surface. A cut- off wall may be provided in the ground to guide the flowing groundwater through gaps at which a number of tubes may be located in series. The gas may be air. IMAGE
展开▼
