title: Pyrene biodegradatin in aqueous solutions and soil slurries by Mycobacterium PYR-1 and enriched consortium.
abstract: To better understand complex bioavailability issues, pyrene degradation was examined in aqueous and soil slurry solutions using pure Mycobacterium sp. PYR-1 and a microbial consortium. The intrinsic rates of the aqueous pyrene degradation were very similar, 1.3 x 10(-9) microg pyrene/CFU-h for Mycobacterium sp. PYR-1 and 1.1 x 10(-9) microg pyrene/CFU-h for the consortium. Rates were much lower with the soil-slurry experiments, ranging from 1.2 x 10(-12) to 7.8 x 10(-10) microg/CFU-h, depicting the strong negative effects of soils on bioavailability. Supernatants from the slurry experiments were found to increase the aqueous-phase pyrene solubility significantly. Pyrene solubility was increased from 120.5 to over 230 microg/l. However, the linear adsorption constants of pyrene on the soil were reduced.
authors.affiliation: Department of Civil Engineering, University of Akron, OH 44325-3905, USA.
authors.forename: N
authors.initials: N
authors.lastname: Ramirez
authors.forename: T
authors.initials: T
authors.lastname: Cutright
authors.forename: L K
authors.initials: LK
authors.lastname: Ju
mesh_terms: D001673:Biodegradation, Environmental; D001682:Biological Availability; D005456:Fluorescent Dyes / Q000378:metabolism*; D009161:Mycobacterium / Q000502:physiology*; D011721:Pyrenes / Q000378:metabolism*; D012989:Soil Pollutants / Q000378:metabolism*; D012995:Solubility
chemical_list: D005456:Fluorescent Dyes; D011721:Pyrenes; D012989:Soil Pollutants; C030984:pyrene