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Tuesday, August 11, 2020 | History

2 edition of Microbial degradation of aromatic hydrocarbons in marine sediments found in the catalog.

Microbial degradation of aromatic hydrocarbons in marine sediments

Joan F. Braddock

Microbial degradation of aromatic hydrocarbons in marine sediments

final report

by Joan F. Braddock

  • 389 Want to read
  • 33 Currently reading

Published by University of Alaska, Institute of Arctic Biology in Fairbanks, Alaska .
Written in English

    Subjects:
  • Hydrocarbons.,
  • Marine sediments.

  • Edition Notes

    Statementby Joan F. Braddock, Principal Investigator and Zachary Richter, Institute of Arctic Biology, University of Alaska, Fairbanks.
    SeriesOCS study
    ContributionsRichter, Zachary., United States. Minerals Management Service. Alaska OCS Region., University of Alaska, Fairbanks. Institute of Arctic biology.
    The Physical Object
    Paginationiv, 82 p.
    Number of Pages82
    ID Numbers
    Open LibraryOL15534037M

    aromatic hydrocarbons degradation by marine-derived basidiomycetes: optimization of the Although studies related to the microbial degradation of PAHs have been carried out in the last decades, little is known about degra-dation of these environmental pollutants by fungi from marine origin. such as ocean and marine sediments In.   A microbial composition study of sediments of contaminated (CWS) and uncontaminated (UWS) lentic ecosystems within Akwa Ibom State was carried out by analyzing the small-subunit rRNA genes to determine the effect of hydrocarbon contamination on its microbial composition and diversity. Analysis of the V4 region of the community DNA from both sediments revealed the presence of .

    Therefore, the intent of this review is to update information on microbial degradation of Polycyclic Aromatic Hydrocarbons towards the better understanding in bioremediation challenges. 2. Polycyclic Aromatic Hydrocarbons (PAHs) Physical and chemical properties: Polycyclic Aromatic Hydrocarbons or PAHs as they are fondly called are chemical.   Melcher RJ, Apitz SE, Hemmingsen BB: Impact of irradiation and polycyclic aromatic hydrocarbon spiking on microbial populations in marine sediment for future aging and biodegradability studies. Appl Environ Microbiol. , /AEM CAS .

      Ulrike Jaekel, Johannes Zedelius, Heinz Wilkes, Florin Musat, Anaerobic degradation of cyclohexane by sulfate-reducing bacteria from hydrocarbon-contaminated marine sediments, Frontiers in Microbiology, /fmicb, 6, (). Polycyclic aromatic hydrocarbons (PAH) are significant environmental pollutants and represent a severe health threat. Many cosmopolitan areas including coastal environments are heavily impacted by PAH. This research investigates the isolation of PAH-degrading bacteria from burrow sediment of marine benthic macrofauna and their potential in bioremediation.


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Microbial degradation of aromatic hydrocarbons in marine sediments by Joan F. Braddock Download PDF EPUB FB2

POLYCYCLIC AROMATIC HYDROCARBON DEGRADATION BY NOVEL BACTERIA ISOLATED FROM BURROW SEDIMENTS OF MARINE BENTHIC MACROFAUNA BY Wai Ki Chung The Chinese University of Hong Kong, 1.

The Chinese University of Hong Kong, A THESIS Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of PhilosophyAuthor: Wai Ki Chung. Microbial bidegradation of petroleum hydrocarbon pollutants employs the enzyme catalytic activities of microorganisms to enhance the rate of pollutants degradation.

Hence, the degradation of aromatic substances is dominated by aerobic and anaerobic bacteria and aerobic fungi. Lignin degradation is a slow process that is carried out by aerobic fungi 2 Cited by:   Polycyclic aromatic hydrocarbons (PAHs) are widespread in various ecosystems and are pollutants of great concern due to their potential toxicity, mutagenicity and carcinogenicity.

Because of their hydrophobic nature, most PAHs bind to particulates in soil and sediments, rendering them less available for biological by:   Aromatic hydrocarbons.

We have already described the main mechanism for degradation of aromatic compounds in aerobic conditions, where oxygen is not only the final electron acceptor but also co-substrate of two key processes: hydroxylation and cleavage of the aromatic Cited by: (). Hydrocarbons contamination and microbial degradation in mangrove sediments of the Niger Delta region (Nigeria) Chemistry and Ecology: Vol.

28, No. 5, pp. Microbial degradation of hydrocarbons is often an oxidative process where the initial attack is performed by oxygenases and peroxidases. Aerobic conditions are thus necessary for degradation to occur through these pathways.

Yeast Microbial degradation of aromatic hydrocarbons in marine sediments book in the sediments of 13 coastal sites in Massachusetts was quantified, and the potential of yeast isolates to biotransform polycyclic aromatic hydrocarbons (PAHs) was determined.

Plate counts of yeasts varied between 10(2) to 10(7) CFU g (dry weight) of sediment of hydrocarbons to microbial degradation can be generally. hydrocarbons in marine sediments was reported by Jones. aromatic hydrocarbons by Sphingomonas was r eported by.

Although some bacteria, belonging to Pseudomonas (Das and Chandar, ) and Rhodococcus genera (Hassanshahian et al., and ) have shown able to degrade hydrocarbons (Teramoto et al., ), in marine environments the key micro-organisms in the bio-degradation process has been identified as bacteria related to Alcanivorax genus (Yakimov et al., ; Cappello.

For example, when petroleum hydrocarbon contamination is introduced into the sediments, the microbial community usually develops generalist hydrocarbon degraders in response to easily biodegradable hydrocarbons, which is followed by successive restructuring favoring specialized groups capable of degradation of the more persistent hydrocarbons.

PAHs are aromatic hydrocarbons with two or more fused benzene rings with natural as well as anthropogenic sources. photolysis, and chemical degradation, microbial degradation is the major degradation process.

PAH degradation depends on the environmental conditions, number and type of the microorganisms, nature and chemical structure of the. Microbial interactions, including interactions between microbes during hydrocarbon degradation as well as interactions with meio- and macrofauna and plants in oil-polluted marine sediments, have been recently reviewed (McGenity et al.

), highlighting the need for a better understanding of microbial interactions, to achieve a more rational. Coastal marine sediments, where important biological processes take place, supply essential ecosystem services. By their location, such ecosystems are particularly exposed to human activities as evidenced by the recent Deepwater Horizon disaster.

This catastrophe revealed the importance to better understand the microbial processes involved on hydrocarbon degradation in marine sediments raising. Aromatic compounds are among the most prevalent and persistent pollutants in the environment.

Petroleum-contaminated soil and sediment commonly contain a mixture of polycyclic aromatic hydrocarbons (PAHs) and heterocyclic aromatics.

Aromatics derived from industrial activities often have functional groups such as alkyls, halogens and nitro groups. Biodegradation is a major mechanism of.

Polycyclic aromatic hydrocarbons (PAHs) are one of the major categories of pollutants entering the marine environment and finally accumulating in the sediments. Their occurrence raises major concerns for human health, especially during coastal activities (bathing waters, aquaculture, etc.), having combined adverse effects still largely [ 1 ].

Coates JD, Woodward J, Allen J, Philp P, Lovley DR () Anaerobic degradation of polycyclic aromatic hydrocarbons and alkanes in petroleum-contaminated marine harbor sediments. Appl Environ Microbiol – Google Scholar. In some cases, the degradation of polycyclic aromatic hydrocarbons by deepwater microbial communities has been reported to be higher at low T (4–5°C) compared to high T incubations (20–24°C) (Campo, Venosa, & Suidan, ; Liu, Bacosa, & Liu, ).

Detrital biomass and hydrocarbon degradation. In deep-sea marine sediments, organic carbon is supplied either as detrital matter from the overlying water column or as aliphatic and aromatic. Microbial Consortia and Biodegradation of Petroleum Hydrocarbons in Marine Environments.

Biodegradation of Polycyclic Aromatic Hydrocarbons (PAHs) by Microbes Isolated from the Marine Sponge Biemna fortis (Topsent ) Microbial Degradation of Hydrocarbons in the Environment: An Overview.

Pages. Bacteria play an important role in the removal of polycyclic aromatic hydrocarbons (PAHs) from polluted environments.

In marine environments, Cycloclasticus is one of the most prevalent PAH-degrading bacterial genera. However, little is known regarding the degradation mechanisms for multiple PAHs by Cycloclasticus.

Cycloclasticus sp. strain P1 was isolated from deep-sea sediments and is known.Hydrocarbon degradation and shifts in microbial community structure were measured. Surprisingly, oil hydrocarbon biodegradation under anoxic conditions exceeded that under oxic conditions; this was particularly evident in the degradation of aromatic hydrocarbons.

Important microbial taxa associated with the anoxic microcosms included.The book discusses ways to overcome the side effects of using hydrocarbon-based products as energy sources. Hydrocarbons produce raw crude oil waste of aroundmetric tons per annum, with a ran Biodegradation of Polycyclic Aromatic Hydrocarbons (PAHs) by Microbes Isolated from the Marine Sponge Biemna fortis Microbial Degradation.