Toxicity Screening of Benzene, Toluene, Ethylbenzene and Xylene (BTEX) Hydrocarbons in Groundwater at Sour-Gas Plants

In this paper a toxicity-based approach was used to assess the quality of groundwater samples collected from gas plants in western Canada. The gas plants selected were typical of plants currently in operation and represent a cross-section of hydrogeological conditions and of the sweetening processes...

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Bibliographic Details
Published in:Canadian water resources journal 2001, Vol.26 (3), p.345-358
Main Authors: Headley, J.V., Goudey, S., Birkholz, D., Linton, L.R., Dickson, L.C.
Format: Article
Language:English
Subjects:
Benzene
Canada
Daphnia
Environmental aspects
ethyl benzene
Ethylene
Groundwater
Hydrocarbons
Sour gas
Testing
Toluene
Toxic chemicals
Xylene
Xylenes
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Summary:In this paper a toxicity-based approach was used to assess the quality of groundwater samples collected from gas plants in western Canada. The gas plants selected were typical of plants currently in operation and represent a cross-section of hydrogeological conditions and of the sweetening processes in use. The focus was on the levels of benzene, toluene, ethylbenzene and xylene (BTEX) group of hydrocarbons as indicator compounds for monitoring the degree of bioremediation and bioventing at the sites. Toxicity tests included bacterial luminescence (Microtox®), daphnia mortality, fathead minnow mortality and lettuce seedling emergence. In general, the concentration of BTEX was a good indicator of the toxicity of the groundwater. However, approximately 5% of the samples were observed to be toxic although the concentrations of BTEX were low (
ISSN:0701-1784
1918-1817
DOI:10.4296/cwrj2603345