Abstract：
:A common approach for remediation of groundwater contamination with volatile organic compounds (VOCs) is contaminant stripping by means of in situ air sparging (IAS). For VOC stripping, pressurized air is injected into the contaminated groundwater volume, followed by the extraction of the contaminant-loaded exhaust gas from the vadose soil zone and its immediate on-site treatment. Progress assessment of such remediation measure necessitates information (i) on the spatial range of the IAS influence and (ii) on temporal variations of the IAS efficiency. In the present study it was shown that the naturally occurring noble gas radon can be used as suitable environmental tracer for achieving the related spatial and temporal information. Due to the distinct water/air partitioning behaviour of radon and due to its straightforward on-site detectability, the radon distribution pattern in the groundwater can be used as appropriate measure for assessing the progression of an IAS measure as a function of space and time. The presented paper discusses both the theoretical background of the approach and the results of an IAS treatment accomplished at a VOC contaminated site lasting six months, during which radon was applied as efficiency indicator.
journal_name
J Environ Radioactjournal_title
Journal of environmental radioactivityauthors
Schubert M,Schmidt A,Müller K,Weiss Hdoi
10.1016/j.jenvrad.2010.11.012subject
Has Abstractpub_date
2011-02-01 00:00:00pages
193-9issue
2eissn
0265-931Xissn
1879-1700pii
S0265-931X(10)00257-2journal_volume
102pub_type
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