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Title: Dynamic underground stripping: steam and electric heating for in situ decontamination of soils and groundwater

Abstract

A dynamic underground stripping process removes localized underground volatile organic compounds from heterogeneous soils and rock in a relatively short time. This method uses steam injection and electrical resistance heating to heat the contaminated underground area to increase the vapor pressure of the contaminants, thus speeding the process of contaminant removal and making the removal more complete. The injected steam passes through the more permeable sediments, distilling the organic contaminants, which are pumped to the surface. Large electrical currents are also applied to the contaminated area, which heat the impermeable subsurface layers that the steam has not penetrated. The condensed and vaporized contaminants are withdrawn by liquid pumping and vacuum extraction. The steam injection and electrical heating steps are repeated as necessary. Geophysical imaging methods can be used to map the boundary between the hot, dry, contamination-free underground zone and the cool, damp surrounding areas to help monitor the dynamic stripping process. 4 figs.

Inventors:
; ; ; ; ;
Issue Date:
Research Org.:
University of California
OSTI Identifier:
106684
Patent Number(s):
5,449,251
Application Number:
PAN: 8-058,900
Assignee:
Univ. of California, Oakland, CA (United States)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 12 Sep 1995
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; SOILS; ELECTRIC HEATING; STEAM STRIPPING; ORGANIC COMPOUNDS; STEAM INJECTION; VOLATILE MATTER; DISSOLUTION; VAPOR CONDENSATION

Citation Formats

Daily, W D, Ramirez, A L, Newmark, R L, Udell, K, Buetnner, H M, and Aines, R D. Dynamic underground stripping: steam and electric heating for in situ decontamination of soils and groundwater. United States: N. p., 1995. Web.
Daily, W D, Ramirez, A L, Newmark, R L, Udell, K, Buetnner, H M, & Aines, R D. Dynamic underground stripping: steam and electric heating for in situ decontamination of soils and groundwater. United States.
Daily, W D, Ramirez, A L, Newmark, R L, Udell, K, Buetnner, H M, and Aines, R D. Tue . "Dynamic underground stripping: steam and electric heating for in situ decontamination of soils and groundwater". United States.
@article{osti_106684,
title = {Dynamic underground stripping: steam and electric heating for in situ decontamination of soils and groundwater},
author = {Daily, W D and Ramirez, A L and Newmark, R L and Udell, K and Buetnner, H M and Aines, R D},
abstractNote = {A dynamic underground stripping process removes localized underground volatile organic compounds from heterogeneous soils and rock in a relatively short time. This method uses steam injection and electrical resistance heating to heat the contaminated underground area to increase the vapor pressure of the contaminants, thus speeding the process of contaminant removal and making the removal more complete. The injected steam passes through the more permeable sediments, distilling the organic contaminants, which are pumped to the surface. Large electrical currents are also applied to the contaminated area, which heat the impermeable subsurface layers that the steam has not penetrated. The condensed and vaporized contaminants are withdrawn by liquid pumping and vacuum extraction. The steam injection and electrical heating steps are repeated as necessary. Geophysical imaging methods can be used to map the boundary between the hot, dry, contamination-free underground zone and the cool, damp surrounding areas to help monitor the dynamic stripping process. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {9}
}