Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Patent
1994-11-03
1997-06-17
Tsang, Cecilia J.
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
588210, 588212, 588213, 20415715, 2041582, 20415821, 405128, A62D 300
Patent
active
056399367
ABSTRACT:
A method and apparatus for decontaminating in-situ soil by use of solar energy is provided. A targeted area of contaminated in-situ soil is covered with a substantially sunlight-transmitting, nonporous covering that allows solar energy to penetrate said covering. A greenhouse effect subsequently occurs in which trapped solar energy heats the interior air within the covering and in-situ soil below the covering. As the in-situ soil is heated, contaminants found within the in-situ soil are vaporized. The structure comprises first and second side panels with attached first and second end panels. An exhaust vent is provided such that vaporized contaminants and air can escape the interior of the covering. An evacuating device can be utilized to further assist in removal of vaporized contaminants and air within the covering. A fresh air intake mechanism allows replenishment of air that is evacuated or vented with vaporized contaminants. The flow rate of air into the covering may be selectively controlled by using temperature and pressure controls on the intake mechanism and the evacuating device. The targeted in-situ soil may be plowed or churned such that the surface area of soil exposed to solar energy is increased. Chemical agents may be added to the in-situ soil to assist in decontamination.
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Delacroix-Muirheid C.
K N Energy, Inc.
Tsang Cecilia J.
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