Abstract:
:Aerosol delivery was evaluated for distributing biostimulation and bioaugmentation amendments in vadose zones. This technique involves transporting amendments as micron-scale aerosol droplets in injected gas. Microcosm experiments were designed to characterize reductive dechlorination of trichloroethene (TCE) under unsaturated conditions when delivering components as aerosols. Delivering amendments and/or microbes as aqueous aerosols resulted in complete dechlorination of TCE, similar to controls operated under saturated conditions. Reductive dechlorination was achieved with manual injection of a bioaugmentation culture suspended in soybean oil into microcosms. However, aerosol delivery of the culture in soybean oil induced little reductive dechlorination activity. Overall, the results indicate that delivery as aqueous aerosols may be a viable option for delivery of amendments to enhance vadose zone bioremediation at the field-scale.
journal_name
Biodegradationjournal_title
Biodegradationauthors
Hall RJ,Murdoch LC,Freedman DL,Looney BB,Riha BDdoi
10.1007/s10532-015-9718-5subject
Has Abstractpub_date
2015-04-01 00:00:00pages
91-103issue
2eissn
0923-9820issn
1572-9729journal_volume
26pub_type
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