The removal of chlorinated organic compounds in groundwater by steam injection system (II)
Date Issued
2001-07-31
Date
2001-07-31
Author(s)
DOI
892621Z002068
Abstract
A pilot study of a steam injection method for
the treatment of pentachlorophenol (PCP)-
contaminated soil and groundwater has shown
potential advantages over the traditional pumpand-
treatment method. Low-pressure steam was
injected 10 m below the groundwater surface.
The groundwater temperature was raised to
110oC over a period of three months. Five soil
and groundwater sampling events wereperformed during the pilot test. Results of
sample analysis showed that the PCP
contamination plume moved up to the
groundwater surface due to the temperature
gradient in the groundwater. The concentrations
of PCP in the groundwater did not vary
significantly during the test. PCP concentrations
in deep aquifer soil decreased dramatically
whereas those in shallow aquifer soil increased.
It was concluded that the raise in groundwater
temperature desorbed PCP in the deep aquifer
soil. The hot, deep groundwater moved upward
and also brought the desorbed PCP to the
shallow aquifer. By using steam injection, PCP
can be desorbed from soil and be moved upward
to the ground surface so that it can be removed
more easily through pump and treatment.
Publisher
臺北市：國立臺灣大學環境工程學研究所
Type
report
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