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Title: Use of electrolytically generated hydrogen as a purge gas for the isolation of volatile organic compounds from groundwater

Abstract

A device has been developed for use in determining parts per billion concentrations of volatile organic compounds in groundwater. This device is suitable for field use either as a self-contained, portable instrument or as an unattended monitor. The device consists of an immersible electrolysis cell in which hydrogen is generated. This hydrogen efficiently purges volatile organic compounds from water. Those volatile organic compounds are carried by the purge gas to a photoionization detector where their total concentration is measured. The significant advantages of this apparatus for use in the determination of volatile organic compounds include: (1) measurements are made in a hydrogen matrix which is free of interfering species present in water: (2) detection limits for volatile organic compounds are several orders of magnitude lower when compounds are purged from water than when they are measured in the headspace above water; (3) operation of this device does not require use of reagents or utilities other than electricity, which can be supplied by batteries; (4) the device can be readily configured such that it will fit in a small diameter sampling well; and (5) if used as a monitor in a sampling well, the only required connections with the surface wouldmore » be signal and power lines. This device has a detection limit of less than 5 ppb for benzene. For 23 other organic compounds tested, response factors ranged from 0.1 to 1.5 times that for benzene. 10 refs., 3 figs., 2 tabs.« less

Authors:
;  [1]
  1. Iowa State Univ., Ames, IA (United States)
Publication Date:
OSTI Identifier:
5194938
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Journal Article
Journal Name:
Separation Science and Technology; (United States)
Additional Journal Information:
Journal Volume: 28:15-16; Journal ID: ISSN 0149-6395
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 47 OTHER INSTRUMENTATION; 54 ENVIRONMENTAL SCIENCES; WATER POLLUTION; MONITORING; BENZENE; ELECTROLYSIS; EXPERIMENTAL DATA; GASOLINE; GROUND WATER; HYDROGEN; PHOTOIONIZATION; VOLATILE MATTER; AROMATICS; DATA; ELEMENTS; FUELS; HYDROCARBONS; HYDROGEN COMPOUNDS; INFORMATION; IONIZATION; LIQUID FUELS; LYSIS; MATTER; NONMETALS; NUMERICAL DATA; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PETROLEUM PRODUCTS; POLLUTION; WATER; 020900* - Petroleum- Environmental Aspects; 440800 - Miscellaneous Instrumentation- (1990-); 540320 - Environment, Aquatic- Chemicals Monitoring & Transport- (1990-)

Citation Formats

Chriswell, C D, and Richard, J J. Use of electrolytically generated hydrogen as a purge gas for the isolation of volatile organic compounds from groundwater. United States: N. p., 1993. Web. doi:10.1080/01496399308019743.
Chriswell, C D, & Richard, J J. Use of electrolytically generated hydrogen as a purge gas for the isolation of volatile organic compounds from groundwater. United States. doi:10.1080/01496399308019743.
Chriswell, C D, and Richard, J J. Mon . "Use of electrolytically generated hydrogen as a purge gas for the isolation of volatile organic compounds from groundwater". United States. doi:10.1080/01496399308019743.
@article{osti_5194938,
title = {Use of electrolytically generated hydrogen as a purge gas for the isolation of volatile organic compounds from groundwater},
author = {Chriswell, C D and Richard, J J},
abstractNote = {A device has been developed for use in determining parts per billion concentrations of volatile organic compounds in groundwater. This device is suitable for field use either as a self-contained, portable instrument or as an unattended monitor. The device consists of an immersible electrolysis cell in which hydrogen is generated. This hydrogen efficiently purges volatile organic compounds from water. Those volatile organic compounds are carried by the purge gas to a photoionization detector where their total concentration is measured. The significant advantages of this apparatus for use in the determination of volatile organic compounds include: (1) measurements are made in a hydrogen matrix which is free of interfering species present in water: (2) detection limits for volatile organic compounds are several orders of magnitude lower when compounds are purged from water than when they are measured in the headspace above water; (3) operation of this device does not require use of reagents or utilities other than electricity, which can be supplied by batteries; (4) the device can be readily configured such that it will fit in a small diameter sampling well; and (5) if used as a monitor in a sampling well, the only required connections with the surface would be signal and power lines. This device has a detection limit of less than 5 ppb for benzene. For 23 other organic compounds tested, response factors ranged from 0.1 to 1.5 times that for benzene. 10 refs., 3 figs., 2 tabs.},
doi = {10.1080/01496399308019743},
journal = {Separation Science and Technology; (United States)},
issn = {0149-6395},
number = ,
volume = 28:15-16,
place = {United States},
year = {1993},
month = {11}
}