News Column

New Data from N. McKenzie et al Illuminate Findings in Environmental Research (Biodegradation of naphthenic acids in oils sands process waters in an...

August 1, 2014



New Data from N. McKenzie et al Illuminate Findings in Environmental Research (Biodegradation of naphthenic acids in oils sands process waters in an immobilized soil/sediment bioreactor)

By a News Reporter-Staff News Editor at Ecology, Environment & Conservation -- Investigators publish new report on Environmental Research. According to news reporting from Harrowsmith, Canada, by VerticalNews journalists, research stated, "Aqueous extraction of bitumen in the Alberta oil sands industry produces large volumes of oil sands process water (OSPW) containing naphthenic acids (NAs), a complex mixture of carboxylic acids that are acutely toxic to aquatic organisms. Although aerobic biodegradation reduces NA concentrations and OSPW toxicity, treatment times are long, however, immobilized cell reactors have the potential to improve NA removal rates."

The news correspondents obtained a quote from the research, "In this study, two immobilized soil/sediment bioreactors (ISBRs) operating in series were evaluated for treatment of NAs in OSPW. A biofilm was established from microorganisms associated with sediment particles from an OSPW contaminated wetland on a non-woven textile. At 16 months of continuous operation with OSPW as the sole source of carbon and energy, 38 +/- 7% NA removal was consistently achieved at a residence time of 160 h at a removal rate of 2.32 mg NAs L-1 d(-1). The change in NA profile measured by gas chromatography-mass spectrometry indicated that biodegradability decreased with increasing cyclicity. These results indicate that such treatment can significantly reduce NA removal rates compared to most studies, and the treatment of native process water in a bioreactor has been demonstrated."

According to the news reporters, the research concluded: "Amplification of bacterial 16S rRNA genes and sequencing using Ion Torrent sequencing characterized the reactors' biofilm populations and found as many as 235 and 198 distinct genera in the first and second bioreactor, respectively, with significant populations of ammonium- and nitrite-oxidizers."

For more information on this research see: Biodegradation of naphthenic acids in oils sands process waters in an immobilized soil/sediment bioreactor. Chemosphere, 2014;109():164-172. Chemosphere can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Chemosphere - www.elsevier.com/wps/product/cws_home/362)

Our news journalists report that additional information may be obtained by contacting N. McKenzie, Polyferm Canada Inc, RR1, Harrowsmith, ON K0H 1V0, Canada. Additional authors for this research include S.Q. Yue, X.D. Liu, B.A. Ramsay and J.A. Ramsay.

Keywords for this news article include: Harrowsmith, Ontario, Canada, North and Central America, Environmental Research

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


For more stories covering the world of technology, please see HispanicBusiness' Tech Channel



Source: Ecology, Environment & Conservation


Story Tools






HispanicBusiness.com Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters