Biodegradation of tertiary butyl alcohol by an introduced Pseudomonas sp. in subsurface soil microcosms

Microcosm studies determined that the indigenous microflora of the subsurface Groseclose clayey loam did not metabolize TBA, but TBA degradation was stimulated by the addition of the Pseudomonas sp., VT100. The indigenous subsurface microflora of the Fredrick clay metabolized TBA in soil microcosms that contained 10 to 500 mg/liter TBA. The addition of Pseudomonas sp., VT100, to the Fredrick clay enhanced the rate of TBA degradation in the l0 and 500 mg/liter TBA treatments, and reduced the time required for the initiation of TBA degradation. The indigenous Fredrick clay microflora reduced the growth and TBA degrading potential of the Pseudomonas sp. The addition of yeast extract and acetate to the Groseclose clayey loam allowed the indigenous microflora to initiate TBA degradation and enhanced TBA degradation in the sterile Groseclose clayey loam inoculated with Pseudomonas sp., VT100. We hypothesize that the native TBA-degrading microflora competed with the Pseudomonas sp. in both soils. A 1.0 mM molybdate amendment stimulated TBA degradation by the indigenous microflora but reduced the rate of TBA degradation by Pseudomonas sp., VT100, in subsurface soil microcosms. A TBA-degrading Alcaligenes sp. was isolated from the Fredrick clay. Limited TBA degradation was observed in one of three deep subsurface coastal plain soils after 220 days of incubation.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Microbiology

Department dc:contributor.department

Microbiology

Grantor dc:publisher

Virginia Polytechnic Institute and State University

Year dc:date.issued

1989

Author dc:creator

• Eichenberger, John Joseph

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en_US

Handle dc:identifier.uri

http://hdl.handle.net/10919/53209

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/53209