초록 ▼

An advancing freeze front is established in a porous region adjacent to or within contaminated earth. A flow of contaminated liquid phase water migrates toward the freeze front and a concentration of impurities is established in front of the advancing freeze front. When the freeze front reaches a co

An advancing freeze front is established in a porous region adjacent to or within contaminated earth. A flow of contaminated liquid phase water migrates toward the freeze front and a concentration of impurities is established in front of the advancing freeze front. When the freeze front reaches a collection zone, at least a portion is melted and the resultant water bearing concentrated impurities is collected and removed. This process may be repetitively performed. A liquid convection flow can be established transverse to the direction of freeze-front advancement to stabilize the solid/liquid interface at the freeze-front.

대표청구항 ▼

A system for remediating contaminated earth in-situ, comprising: A) a heat transfer assembly disposed in said earth and including means for advancing a freeze-front in a region of said earth adjacent to said assembly toward a collection zone in said region, said assembly being disposed in or adjacen

A system for remediating contaminated earth in-situ, comprising: A) a heat transfer assembly disposed in said earth and including means for advancing a freeze-front in a region of said earth adjacent to said assembly toward a collection zone in said region, said assembly being disposed in or adjacent said contaminated earth, at least a portion of said contaminated earth being disposed between said heat transfer assembly and said collection zone, B) a collection means, for collecting contaminants, disposed in said collection zone, and C) means for establishing a flow of liquid adjacent to said freeze-front and transverse to the direction of advancement of said freeze-front.