alexa The effect of inorganic and organic supplements on the microbial degradation of phenanthrene and pyrene in soils.
Environmental Sciences

Environmental Sciences

Journal of Bioremediation & Biodegradation

Author(s): Carmichael LM, Pfaender FK

Abstract Share this page

Abstract The effects of several bioremediation stimulants, including potential metabolism pathway inducers, inorganic/organic nutrients, and surfactants on the metabolism of phenanthrene and pyrene, as well as the population dynamics of PAH degrading microorganisms was examined in five soils with differing background PAH concentrations, exposure histories and physical properties. Most of the supplements either had no significant effect or decreased the mineralization of [14C]-phenanthrene and [14C]-pyrene in soil slurry microcosms. The effect of a particular supplement, however, was often not uniform within or across soils. Decreased mineralization of [14C]-phenanthrene and [14C]-pyrene was usually due to either preferential use of the supplement as carbon source and/or stimulation of non-PAH degrading microorganisms. Many of the supplements increased populations of heterotrophic microorganisms, as measured by plate counts, but did not increase populations of phenanthrene degrading microorganisms, as measured by the [14C]-PAH mineralization MPN analysis or cellular incorporation of [14C]-PAH. These results suggest that the PAH degrading community at each site may be unique in their response to materials added in an attempt to stimulate PAH degradation. The characteristics of the site, including exposure history, soil type, and temporal variation may all influence their response.
This article was published in Biodegradation and referenced in Journal of Bioremediation & Biodegradation

Relevant Expert PPTs

Relevant Speaker PPTs

Recommended Conferences

Relevant Topics

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

 
© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords