Bioavailability of Polycyclic Aromatic Hydrocarbons and Its Impact on Bioremediation PDF Download
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Author: Ilia Rostami
Publisher:
ISBN:
Category : Soil bioventing
Languages : en
Pages : 306
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Book Description
This thesis investigated the microbial degradation of polycyclic aromatic hydrocarbons (PAHs) in liquid and soil matrices and the influence of PAH bioavailability on biodegradation and ecological/ human exposure. These research themes were investigated using three PAH contaminated Soils collected from a former wood preservation site, a former manufacturing gas plant and a tram yard site in South Australia.
Author: Ilia Rostami
Publisher:
ISBN:
Category : Soil bioventing
Languages : en
Pages : 306
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Book Description
This thesis investigated the microbial degradation of polycyclic aromatic hydrocarbons (PAHs) in liquid and soil matrices and the influence of PAH bioavailability on biodegradation and ecological/ human exposure. These research themes were investigated using three PAH contaminated Soils collected from a former wood preservation site, a former manufacturing gas plant and a tram yard site in South Australia.
Author: P. Baveye
Publisher: Springer Science & Business Media
ISBN: 9401592357
Category : Science
Languages : en
Pages : 502
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Book Description
In the continuing fight against organic environmental xenobiotics, the initial success attributed to bioremediation has paled, in part due to the low availability of xenobiotics entrapped within a soil or sediment matrix. This has generated a very significant wave of interest in the bioavailability issue. However, much experimental evidence is puzzling or contradictory, mechanistic theories are embryonic, and implications for the practice of bioremediation or concerning the natural fate of xenobiotics are still tentative. The debate in Europe and the USA is vigorous. Eastern Europe, following the liberalisation of the economy and political life, is evolving in a similar direction. In many cases, however, limited access to literature sources, severe language barriers, and the lack of a strong pluridisciplinary tradition are hampering the adoption of state of the art techniques. Originally intended to allow scientists in East European countries to become acquainted with the key aspects of the bioavailability debate that is unfolding in the scientific literature in the West, and with its implications for bioremediation efforts, the present book presents a very complete coverage of the theoretical and practical aspects of the (limited) bioavailability of organic xenobiotics in the environment.
Author: Terence Messinger
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 40
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Book Description
Author: Insoo Joo
Publisher:
ISBN:
Category :
Languages : en
Pages : 198
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Book Description
The bioavailability of polycyclic aromatic hydrocarbons (PAHs) in coal-tar contaminated soils plays an important role in determining the risk of these compounds to the environment and humans. Developing an understanding of organic compounds bioavailability will assist in improving risk assessment and developing bioremediation strategies. In the first part of study, the degradation of 16 EPA priority PAHs in soil slurry reactors were investigated along with the change in microbial population. Using DAPI-stained organisms, maximum microbial populations were found to correspond with the depletion of 2- and 3-ring PAHs. Degradation of PAHs was sequential with the 2- and 3-ring PAHs degrading first, followed by the 4- and 5-ring PAHs. There was negligible degradation of 6-ring PAHs. The Modified Gompertz equation, an empirical model, was used to estimate the lag phase, degradation rate, and maximum degraded fraction of individual PAHs. The Monod equation was also applied but did not model the experimental data well especially the change in microorganism population. In the second part of study, several chemical methods were performed to assess the bioavailability of PAHs in three coal-tar contaminated soils from former manufactured gas plant (FMGP) sites. The methods tested were hydroxypropyl-[beta]-cyclodextrin (HPCD), persulfate oxidation, acetone-water mixture extraction, butanol extraction, and solid phase extraction using XAD-2. Residual PAHs in each soil following extraction were compared with the PAHs remaining after biodegradation in soil slurry reactors. Of the five methods tested, the XAD-2 desorption method was determined to the best method for predicting the bioavailability in coal-tar contaminated soils.
Author: Andrea Leeson
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 376
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Book Description
Polycyclic aromatic hydrocarbon compounds (PAHs) are common and challenging contaminants that affect soil and sediments. Methods for treating PAHs have undergone change and refinement in the recent past, and this volume presents the latest trends in PAH remediation theory and practice. The papers in this volume cover topics ranging from the remediation of manufactured gas plant (MGP) sites to the remediation of sediments. The papers present lab and field studies, characterization studies, comparison studies, and descriptions of technologies ranging from composting to thermally enhanced bioremediation to fungal technologies and other innovative approaches.
Author:
Publisher:
ISBN:
Category : Polycyclic aromatic hydrocarbons
Languages : en
Pages : 500
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Book Description
Author: Frank Volkering
Publisher:
ISBN: 9789054855750
Category :
Languages : en
Pages : 175
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Book Description
Author: Joseph Paul Kreitinger
Publisher:
ISBN:
Category :
Languages : en
Pages : 350
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Book Description
Author:
Publisher:
ISBN:
Category : Pollutants
Languages : en
Pages : 104
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 86
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Book Description
The influence of imposed anaerobic conditions on aqueous phase polycyclic aromatic hydrocarbon (PAH) fate was investigated. Highly aged, PAH contaminated soil was incubated with an oxygen scavenging titanium (III) citrate complex, or water, or water that contained nitrate or sulfate in combination with a H2(g), N2(g), or N2:CO2(g) (80:20) headspace. The anaerobic conditions imposed in this study resulted in increased aqueous concentrations of fluoranthene, pyrene, BenzAanthracene and benzoApyrene. BenzAanthracene and benzoApyrene were above a aqueous solubility limits, by as much as an order of magnitude for the latter. The mechanism for this increased PAH solubility is hypothesized to be a combination of oxidation-reduction potential and microbially mediated pH alteration resulting in enhanced solubility of organic material with associated PAH. Methanogenic organisms and sulfate reducing bacteria were seen to have the most significant effect on an increase in aqueous phase PAH. In addition, incubations that changed from anaerobic to aerobic conditions assessed the effect of anaerobiosis conditions on bioavailability. The solvating effect of formalin, used as a metabolic inhibitor, was also examined.
