alexa Microbial transformation of nitroaromatic compounds under anaerobic conditions.
Agri and Aquaculture

Agri and Aquaculture

Journal of Aquaculture Research & Development

Author(s): Gorontzy T, Kver J, Blotevogel KH

Abstract Share this page

Abstract The transformation of several mono- and dinitroaromatic compounds (tested at 50-200 microM) by methanogenic bacteria, sulphate-reducing bacteria and clostridia was studied. Some of the nitroaromatics tested were transformed chemically by 1.5 mM quantities of culture media reducing agents, like cysteine or sulphide. This abiotic reduction occurred at the o-nitro-groups preferentially. Nitrophenols, p-nitroaniline and p-nitrobenzoic acid were completely transformed biologically into the corresponding amino derivatives. The nitroaromatics were transformed by all of the bacterial strains tested. While growing cells of sulphate-reducing bacteria and Clostridium spp. carried out nitroreduction, methanogen cells lysed in the presence of nitroaromatics. Nevertheless these culture suspensions converted nitroaromatics to the corresponding amino derivatives. This was also confirmed by crude cell extracts of methanogenic bacteria. The rate of nitroreduction by sulphate-reducing bacteria depended on the electron donors supplied and the cell density, with molecular hydrogen being the most effective donor of reducing equivalents. The toxicity of p-nitrophenol to some of the organisms tested depended on the concentration of the nitroaromatic compound and the type of organism. This article was published in J Gen Microbiol and referenced in Journal of Aquaculture Research & Development

Relevant Expert PPTs

Recommended Conferences

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