Patent ID: 6458271
Filing Date: 2002-10-01
Classification: B09C,C02F,Y10S

Abstract:
A groundwater decontamination system comprising at least one non-pumping well, a decontamination unit, means for lowering said decontamination unit down through said non-pumping well into an aquifer containing contaminated water such that the unit can be located in the contaminated water at a selected depth and for raising said unit out of said non-pumping well, said decontamination unit comprising a porous outer tube having a plurality of holes therein through which contaminated water can flow, a porous inner tube having a plurality of holes through which can flow in-flowing contaminated water flowing through said outer tube, a contaminant removing barrier disposed within the inner tube for removing, on contact, contaminants from the in-flowing water such that the water flows through the outer tube, the inner tube, and the barrier and back out of the barrier, back through the inner tube and the outer tube to exit from the unit, and a flow directing means for directing in flowing water from the holes in said outer tube to said inner tube and thus to the contaminant removing barrier, said barrier including a material for decontaminating a radionuclide contained in the contaminated water.