Title: In situ isolation of volatile organic compounds from groundwater

Abstract

Methods and apparatus for in sire isolation of volatile organic compounds from groundwater using electrolytically-generated purge gas are disclosed. One preferred method includes electrolytically generating a purge gas from the ground water, passing the purge gas through the groundwater (in situ) to purge volatile organic compounds from groundwater, collecting the purge gas along with the purged volatile organic compounds, and detecting (in situ) the presence and/or amount of purged volatile organic compounds in the purge gas. One preferred apparatus includes a generally cylindrical cell incorporating the necessary electrodes, one or more ionization sources and detectors.

Inventors:

Chriswell, Colin D.; Richard, John J.

Issue Date:

1995-12-26

Research Org.:

Iowa State Univ., Ames, IA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1531415

Patent Number(s):

5478452

Application Number:

08/331,000

Assignee:

Iowa State University Research Foundation, Inc. (Ames, IA)

Patent Classifications (CPCs):

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

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G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

G01N33/0047 - {for organic compounds}
G01N33/1826 - {organic contamination in water}

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DOE Contract Number:  

W-7405-ENG-82

Resource Type:

Patent

Resource Relation:

Patent File Date: 1994-10-28

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 54 ENVIRONMENTAL SCIENCES