Formation of chloroform in soil. A year-round study at a Danish spruce forest site

Soil air from top soil of a Danish spruce forest was investigatedmonthly from December 1997 to December 1998 for the occurrence ofchloroform, 1,1,1-trichloroethane, tetrachloromethane, trichloroethene and tetrachloroethene. Within the monitoring period, three different patterns of soil air concentra...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 2002-09, Vol.139 (1-4), p.35-41
Main Authors: HASELMANN, Kim F, LATURNUS, Frank, GRØN, Christian
Format: Article
Language:English
Subjects:
Applied sciences
Atmospheric pollution
Autumn
Chlorine compounds
Chloroform
Coniferous forests
Dispersed sources and other
Environmental monitoring
Exact sciences and technology
Forest soils
Microbial activity
Microorganisms
Nonpoint source pollution
Point source pollution
Pollution
Pollution sources. Measurement results
Seasonal variations
Soil contaminants
Soil microorganisms
Soils
Spring
Studies
Tetrachloroethylene
Trichloroethane
Trichloroethylene
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Summary:Soil air from top soil of a Danish spruce forest was investigatedmonthly from December 1997 to December 1998 for the occurrence ofchloroform, 1,1,1-trichloroethane, tetrachloromethane, trichloroethene and tetrachloroethene. Within the monitoring period, three different patterns of soil air concentrations wereidentified. For chloroform, concentrations peaked in spring and autumn while 1,1,1-trichloroethane and tetrachloromethane peakedduring mid winter. Trichloroethene and tetrachloroethene, concentrations remained constant throughout the year. The relative ratios of soil air concentrations to ambient air concentrations indicated a natural production of chloroform, while the other chlorinated compounds investigated probably originated from non-point source pollution. The seasonal variation of the chloroform concentration suggested a productionby microorganisms, as high chloroform concentrations were found in the soil in warm and humid periods of the year (spring and autumn) with high microbial activity.[PUBLICATION ABSTRACT]
ISSN:0049-6979
1573-2932
DOI:10.1023/A:1015896719508