Microbial degradation of aromatic compounds in a gravel bed hydroponic (GBH) system by Andrew Addleton Download PDF EPUB FB2
Microbial degradation of aromatic compounds in a Gravel Bed Hydroponic (GBH) system. Author: Addleton, Andrew Mark.
ISNI: Awarding Body: University of Portsmouth Current Institution: University of Portsmouth Date of Award. [Microbial degradation of aromatic compounds]. [Article in German] Lingens F. Benzene degrading bacteria can be isolated easily. In this contribution, the degradation pathway of benzene has been described.
It shows a formation of catechol as an intermediate product which can be split oxidatively between hydroxyl groups (an ortho-splitting) as Cited by: 1.
Microbial degradation of aromatic compounds - from one strategy to four. Aromatic compounds are both common growth substrates for microorganisms and prominent environmental pollutants.
The crucial step in their degradation is overcoming the resonance energy that stabilizes the ring structure. The classical strategy for degradation comprises Cited by: General pathway for aromatic HC degradation (Eweis et al., ; Singh and Ward ) This book surveys microbial physiology, genetic information transfer and processing, technologies for gene.
Last century witnessed widespread use of phenolic and polycyclic aromatic hydrocarbons (PAHs) as dyes, polymers, plastics, pigments and also in pharmaceutical sectors.
However, the uses of both these compounds in monomeric or polymeric form are being discouraged because of its origin from non-renewable resources. Due to the environmental concern, there is a great need of eco-friendly Cited by: 1. The following compounds were studied under aerobic conditions in an attached biofilm system: phenol, methylphenols, chlorophenols, nitrophenol and aromatic hydrocarbons.
At concentrations below μg/1 the degradation is typically controlled by a first order kinetics. Microbial Degradation of Aromatic Compounds. By David T. Gilbson. See all Hide authors and affiliations. Science 13 Sep Vol.Issuepp.
DOI: /science Article; Info & Metrics; eLetters; PDF; This is a PDF-only article. The first page of the PDF of this article. Mihelcic JR, Luthy RG () Degradation of polycyclic aromatic hydrocarbon compounds under various redox conditions in soil-water systems.
Appl Environ Microbiol 54(5)– Google Scholar Moody JD, Freeman JP, Doerge DR, Cerniglia CE () Degradation of phenanthrene and anthracene by Microbial degradation of aromatic compounds in a gravel bed hydroponic book suspensions of Mycobacterium sp.
strain PYR Degradation rate, of petroleum hydrocarbon compounds by microorgan- isms, is based essentially on the chemical con guration of these compounds as 15 Microbial Deg radation of Hydrocarbon s in the.
Substrate oxidation by oxygenases in the catabolism of all aliphatic, cyclic and aromatic compounds by microbial is considered a key step in the biodegradation process (Meng et al., ). Nutrients.
Nutrients are important components for a successful the contaminants biodegradation, including nitrogen, iron and phosphorus in some cases (Atlas. The microbial degradation of phenol (– mg l −1), p-nitrophenol (50– mg l −1), and phenanthrene (50– mg l −1) adsorbed on powdered activated carbon (PAC) was combination of physical sorption and biological degradation on PAC, which serves as adsorbent carrier, was compared with the degradation performance of suspended cells and cultures attached to sand.
Resins contain aromatic compounds with long alkyl chain and are soluble in n-heptane and n-pentane (Jada and Salou,Parra-Barraza et al.,Chandra et al., ). They are structurally similar to surface-active molecules in crude oil and act as peptizing agents (Jada and Salou,Chandra et al., ).
Asphaltenes. This paper describes the degradation of naphthalene, phenanthrene, anthracene, fluoranthene, and pyrene in soil and soil/compost mixtures. Compost addition facilitated the degradation of mg naphthalene/kg soil and mg/kg each of other polycyclic aromatic hydrocarbons (PAH) within 25 days in soil systems with water contents below the water-holding capacity.
Even polychlorinated compounds, such as the wood preservative and herbicide pentachlorophenol, can be utilized as a source of carbon by some bacteria.
The study of the biodegradation of halogenated hydrocarbons has led to the discovery of novel catabolic pathways in which unusual and previously undescribed enzymatic activities have been detected. For a long time, the mechanism considered to be prevalent for oil degradation in petroleum reservoirs was the well documented aerobic microbial metabolism and it has long been thought that the flow of oxygen through meteoric waters was necessary for in-reservoir petroleum biodegradation .This mechanism has been widely accepted despite the fact that oxygen would likely.
The ability of microbial populations to mediate the anaerobic transformation of six aromatic compounds in sedi ments from the Milwaukee Harbor, Green Bay, and Lake Erie was examined Sediment slurries were incubated in an anaerobic mineral salts medium that was amended with multiple electron acceptors, including manganese(IV) and Fe(III) oxides, and the concentrations of the aromatic substrates.
Perez-Pantoja D, De la Iglesia R, Pieper DH, Gonzalez B () Metabolic reconstruction of aromatic compounds degradation from the genome of the amazing pollutant degrading bacterium Cupriavidus necator JMP FEMS Microbiol Rev – likely candidates to be used for degradation of highly toxic PAHs in contam-inated areas.
Keywords: PAH biodegradation, Planomicrobium, Rhodococcus, phen-anthrene, pyrene. Polycyclic aromatic hydrocarbons (PAHs) is the common name for a class of several hundred different compounds, which typically contain two to seven condensed benzene rings.
Science. Sep 13;() Microbial degradation of aromatic compounds. Gibson DT. PMID: [PubMed - indexed for MEDLINE]. 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.
Biodegradation of chloroethenes, PBDEs and HBCD occurs in various environmental or living samples [31, 32].In the environment, microorganisms play major roles in the degradation reactions; while intrinsic detoxicification systems in plants and animals bodies metabolize these compounds [31, 33].In this article, the diverse and complex microbial degradation machineries are presented and compared.
Bioremediation functions basically on biodegradation, which may refer to complete mineralization of organic contaminants into carbon dioxide, water, inorganic compounds, and cell protein or.
Hydrocarbons contamination and microbial degradation in mangrove sediments of the Niger Delta region (Nigeria) Chemistry and Ecology: Vol.
28, No. 5, pp. 1 Introduction. Phenolic compounds generated during industrial and agricultural processes are hazardous wastewater contaminants due to their toxicity and resistance to biological degradation Due to limited resources of petroleum oil and natural gas and various economic constraints, a partial substitution of the petro‐chemicals by the carbo‐chemicals is expected 7, 8.
cyclic compounds, aromatic compounds are more stable because of sharing of delocalized electrons by pi bonds. BTEX (benzene, toluene, ethylbenzene, xylene) compounds are comparatively more mobile and water- miscible. There are two major steps involved in biodegradation of an aromatic molecule (1) activation of the ring, (2) ring cleavage (Fig 1).
The microbial degradation of aromatic pollutants has been well characterized over a period of more than 30 years. The microbes of most interest have been bacteria and fungi. Only relatively recently has the question of how algae figure in the catabolism of these compounds attracted a degree of interest.
precisely. Microcosm studies with labelled aromatic compounds and aquifer material may be well used to provide evidence for the intrinsic microbial degradation potential (Williams et al., ).
However, it is not clear if the mineralisation rate of labelled compounds in the laboratory are representative to quantify the biodegradation in the field. Microbial biodegradation is the use of bioremediation and biotransformation methods to harness the naturally occurring ability of microbial xenobiotic metabolism to degrade, transform or accumulate environmental pollutants, including hydrocarbons (e.g.
oil), polychlorinated biphenyls (PCBs), polyaromatic hydrocarbons (PAHs), heterocyclic compounds (such as pyridine or quinoline. The aromatic degradative genotype P. putida xylE (BTEX degradation) was found in only one of the eight pristine soils (%) but in % of the contaminated soils (Table (Table5).
For the PAH-degradative genotypes, ndoB was present in only one of the pristine soils (%) but became enriched in contaminated soils (%).
Joseph D. Rouse, David A. Sabatini, Joseph M. Suflita and Jeffrey H. Harwell, Influence of surfactants on microbial degradation of organic compounds, Critical Reviews in Environmental Science and Technology, 24, 4, (), (). Polycyclic aromatic hydrocarbons (PAHs) occur as common constituents of petroleum, coal tar, and shale oil but are most frequently formed by incomplete combustion of fossil fuels ().These contaminants represent a class of compounds that are widely distributed in nature and are generally considered to have genotoxic or carcinogenic potential (21, 31).MICROBIAL DEGRADATION OF CREOSOTE-DERIVED COMPOUNDS IN NATURAL AND LABORATORY MICROCOSMS By E.
Michael Godsy Research Microbiologist U.S. Geological Survey Middlefield Road Menlo Park, California EPA - IAG Identification Number - DW Final Report Covering the Period from Aug to September 1, September 1,The development of environmentally sustainable plant and fish production in aquaponic systems requires a complete understanding of the systems biological components.
In order to better understand the role of microorganisms in this association, we studied the bacterial communities in the dry, root, and mineralized zones of a flood-and-drain media bed aquaponic system.