Studies On Biodegradation Kinetics For Polycyclic Aromatic Hydrocarbons Pahs In Wafer Reactors
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Studies On Biodegradation Kinetics For Polycyclic Aromatic Hydrocarbons Pahs In Wafer Reactors
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Author : Qi Song
language : en
Publisher:
Release Date : 1998
Studies On Biodegradation Kinetics For Polycyclic Aromatic Hydrocarbons Pahs In Wafer Reactors written by Qi Song and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Biodegradation Kinetics Of Polycyclic Aromatic Hydrocarbons In Soil Slurry And Soil Column Reactors
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Author : Jicheng Guo
language : en
Publisher:
Release Date : 1998
Biodegradation Kinetics Of Polycyclic Aromatic Hydrocarbons In Soil Slurry And Soil Column Reactors written by Jicheng Guo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Biodegradability Of Select Polycyclic Aromatic Hydrocarbon Pah Mixtures
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Author : Anuradha M. Desai
language : en
Publisher:
Release Date : 2007
Biodegradability Of Select Polycyclic Aromatic Hydrocarbon Pah Mixtures written by Anuradha M. Desai and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Polycyclic aromatic hydrocarbons (PAHs) are environmentally significant because of their ubiquity and the toxicity of some. Their recalcitrance and persistence makes them problematic environmental contaminants. Microbial degradation is considered to be the primary mechanism of PAH removal from the environment. Biodegradation kinetics of individual PAHs by pure and mixed cultures have been reported by several researchers. However, contaminated sites commonly have complex mixtures of PAHs whose individual biodegradability may be altered in mixtures. Biodegradation kinetics for fluorene, naphthalene, 1,5-dimethylnaphthalene and 1-methylfluorene were evaluated in sole substrate systems, binary and ternary systems using Sphingomonas paucimobilis EPA505. The Monod model was fitted to the data from the sole substrate experiments to yield biokinetic parameters, (qmax and Ks). The first order rate constants (qmax/Ks) for fluorene, naphthalene and 1,5-dimethylnaphthalene were comparable, although statistically different. However, affinity constants for the three compounds were not comparable. Binary and ternary experiments indicated that the presence of another PAH retards the biodegradation of the co-occurring PAH. Antagonistic interactions between substrates were evident in the form of competitive inhibition, demonstrated mathematically by the Monod multisubstrate model. This model appropriately predicted the biodegradation kinetics in mixtures using the sole substrate parameters, validating the hypothesis of common enzyme systems. Competitive inhibition became pronounced under conditions of: Ks1 “Ks, S1” Ks1 and S1” S. Experiments with equitable concentrations of substrates demonstrated the effect of concentration on competitive inhibition. Ternary experiments with naphthalene, 1,5-dimethylnapthalene and 1-methylfluorene revealed preferential degradation, where depletion of naphthalene and 1,5-dimethylnapthalene proceeded only after the complete removal of 1-methylfluorene. The substrate interactions observed in binary and ternary mixtures require a multisubstrate model to account for simultaneous degradation of substrates. However, developing models that account for sequential degradation may be useful in scenarios where PAHs may not be competitive substrates. These mixture results prove that substrate interactions must be considered in designing effective bioremediation strategies and that sole substrate performance is limited in predicting biodegradation kinetics of complex mixtures.
Bioremediation Of Surface And Subsurface Contamination
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Author : Rakesh K. Bajpai
language : en
Publisher:
Release Date : 1997
Bioremediation Of Surface And Subsurface Contamination written by Rakesh K. Bajpai and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Technology & Engineering categories.
Bioremediation is regarded as a desirable means of restoration of contaminated sites. Fundamental and applied research activity is being carried out on the biodegradation of contaminants, development of engineering systems for bioremediation, and in understanding how the biological processes interact with the abiotic processes that take place in nature. This volume assesses varying aspects of bioremediation, problems encountered at field sites, and scale-ups of solutions being generated at bench scale with the objective of furthering critical developments and their utilization.
In Situ And On Site Bioremediation
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Author : Bruce C. Alleman
language : en
Publisher:
Release Date : 1997
In Situ And On Site Bioremediation written by Bruce C. Alleman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Technology & Engineering categories.
Topics include: Vol.
Ozonation Of Water And Waste Water
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Author : Christiane Gottschalk
language : en
Publisher: John Wiley & Sons
Release Date : 2010-02-01
Ozonation Of Water And Waste Water written by Christiane Gottschalk and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-02-01 with Technology & Engineering categories.
The leading resource on ozone technology, this book contains everything from chemical basics to technical and economic concerns. The text has been updated to include the latest developments in water treatment and industrial processes. Following an introduction, the first part looks at toxicology, reaction mechanisms and full-scale applications, while Part B covers experimental design, equipment and analytical methods, mass transfer, reaction kinetics and the application of ozone in combined processes.
Toxicological Profile For Polycyclic Aromatic Hydrocarbons
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Author :
language : en
Publisher:
Release Date : 1995
Toxicological Profile For Polycyclic Aromatic Hydrocarbons written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Polycyclic aromatic hydrocarbons categories.
Gas Abstracts
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Author :
language : en
Publisher:
Release Date : 1996
Gas Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Gas manufacture and works categories.
Biotechnology For Waste And Wastewater Treatment
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Author : Nicholas P. Cheremisinoff
language : en
Publisher: Elsevier
Release Date : 1997-12-31
Biotechnology For Waste And Wastewater Treatment written by Nicholas P. Cheremisinoff and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-12-31 with Science categories.
This book examines the practices used or considered for biological treatment of water/waste-water and hazardous wastes. The technologies described involve conventional treatment processes, their variations, as well as future technologies found in current research. The book is intended for those seeking an overview to the biotechnological aspects of pollution engineering, and covers the major topics in this field. The book is divided into five major sections and references are provided for those who wish to dig deeper.
Hydrocarbon Pollution And Its Effect On The Environment
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Author : Muharrem Ince
language : en
Publisher: BoD – Books on Demand
Release Date : 2019-12-04
Hydrocarbon Pollution And Its Effect On The Environment written by Muharrem Ince and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-12-04 with Technology & Engineering categories.
This book covers hydrocarbon pollution, measurement techniques for hydrocarbons, risk assessment, and environmental impact. This comprehensive book takes a broad view of the subject and integrates a wide variety of approaches. This book attempts to address the needs of graduate and postgraduate students and other professionals or readers interested in food, soil, water, and air pollution. The aim of this book is to explain and clarify important studies, and compare and develop the new and groundbreaking measurement techniques. Written by leading experts in their respective areas, the book is highly recommended to professionals interested in environmental and human health because it provides specific and comprehensive examples.