Download or read book Characterization of Soil Biofilms for the Biodegradation of Polycyclic Aromatic Hydrocarbons written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polycyclic Aromatic Hydrocarbons (PAHs) are common contaminants in soils and groundwater aquifers, resulting from anthropogenic activities. Major concerns with these compounds are their recalcitrance, toxicity and other unique characteristics in the environment. In situ bioremediation has been successfully used for some PAH degradation in soils, but the optimum conditions for the continuous active growth of microbial communities are not well-understood, so biodegradation processes cannot be properly enhanced. Lab-scale column reactors simulating sandy aquifer environments were used as attachment medium for the biofilm. The biological degradation of a low molecular weight PAH, naphthalene, was investigated, resulting in a 93.5% removal using acetate as a co-substrate. Biofilm mass and extracellular polymeric substances were greatly improved by the presence of acetate, which also promoted the degradation of naphthalene. Biofilm morphology and structure were characterized qualitatively and quantitatively by using confocal microscopy and image analysis, suggesting that porous media biofilms are complex matrixes that develop and change with specific environmental conditions. Sole-substrates, as well as binary/tertiary mixtures of 2-, 3- and 4-ringed PAHs, were examined for competitive/inhibitive interactions on porous media biofilms. While phenanthrene and pyrene could not be degraded as sole carbon sources, binary systems of the 3- and 4-ring PAHs with acetate and naphthalene supplements stimulated their degradation, with up to 87.9% and 70.1% removal efficiencies, respectively. However, inhibition of pyrene degradation by phenanthrene was observed in the tertiary systems. Heterogeneous surface films and a variety of biological aggregate structures and growth patterns were observed by confocal microscopy. A nonionic surfactant was tested for water solubility enhancements of naphthalene, phenanthrene and pyrene. Solutions of Triton X-100 above the critical micelle concentration (CMC) showed great solubilization of the three PAHs. Batch experiments were also conducted to investigate the sorption effects of PAHs and/or Triton X-100 to the porous media, as well as the partitioning to live/killed biofims. Low amounts of surfactant were found to be adsorbed onto sand and biofilm; Triton X-100 appeared to increase PAH sorption, but sorbed concentrations were still considered negligible. The effects of the nonionic surfactant on the biodegradation of PAHs were also investigated. Column experiments showed that the degradation of the 2-ring PAH alone was not affected and only a small enhancement of 3- and 4-ring PAH (as sole-substrates) degradation occurred by Triton X-100 addition. Higher biodegradations were always achieved by having just PAH mixtures without the surfactant, indicating the importance of cross feeding / cometabolic mechanisms over improved solubilization of PAHs.
Download or read book Characterization and Enhancement of Microbial Biofilms in Porous Media for the Biodegradation of Polycyclic Aromatic Hydrocarbons written by Tatsuji Ebihara and published by . This book was released on 1999 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microbial Biodegradation and Bioremediation written by Surajit Das and published by Elsevier. This book was released on 2014-07-01 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microbial Biodegradation and Bioremediation brings together experts in relevant fields to describe the successful application of microbes and their derivatives for bioremediation of potentially toxic and relatively novel compounds. This single-source reference encompasses all categories of pollutants and their applications in a convenient, comprehensive package. Our natural biodiversity and environment is in danger due to the release of continuously emerging potential pollutants by anthropogenic activities. Though many attempts have been made to eradicate and remediate these noxious elements, every day thousands of xenobiotics of relatively new entities emerge, thus worsening the situation. Primitive microorganisms are highly adaptable to toxic environments, and can reduce the load of toxic elements by their successful transformation and remediation. - Describes many novel approaches of microbial bioremediation including genetic engineering, metagenomics, microbial fuel cell technology, biosurfactants and biofilm-based bioremediation - Introduces relatively new hazardous elements and their bioremediation practices including oil spills, military waste water, greenhouse gases, polythene wastes, and more - Provides the most advanced techniques in the field of bioremediation, including insilico approach, microbes as pollution indicators, use of bioreactors, techniques of pollution monitoring, and more
Download or read book Genetic Analysis of High Molecular Weight Polycyclic Aromatic Hydrocarbon Biodegradation written by Haakrho Yi and published by . This book was released on 2006 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biodegradation and Bioremediation written by Ajay Singh and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this volume, experts from universities, government labs and industry share their findings on the microbiological, biochemical and molecular aspects of biodegradation and bioremediation. The text covers numerous topics, including: bioavailability, biodegradation of various pollutants, microbial community dynamics, properties and engineering of important biocatalysts, and methods for monitoring bioremediation processes. Microbial processes are environmentally compatible and can be integrated with non-biological processes to detoxify, degrade and immobilize environmental contaminants.
Download or read book Phylogenetic Analysis of the Microbial Communities of Soils in the La Brea Asphalt Seeps and PAH Contaminated Rhizoplane written by Ian Nathaniel Balcom and published by . This book was released on 2007 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Microbial Ecology of the Biodegradation of Polycyclic Aromatic Hydrocarbons PAHs in Soil Systems written by and published by . This book was released on 2012 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biofilms in Plant and Soil Health written by Iqbal Ahmad and published by John Wiley & Sons. This book was released on 2017-10-02 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biofilms are predominant mode of life for microbes under natural conditions. The three-dimensional structure of the biofilm provides enhanced protection from physical, chemical and biological stress conditions to associated microbial communities. These complex and highly structured microbial communities play a vital role in maintaining the health of plants, soils and waters. Biofilm associated with plants may be pathogenic or beneficial based on the nature of their interactions. Pathogenic or undesirable biofilm requires control in many situations, including soil, plants, food and water. Written by leading experts from around the world, Biofilms in Plant and Soil Health provides an up-to-date review on various aspects of microbial biofilms, and suggests future and emerging trends in biofilms in plant and soil health. Issues are addressed in four sub areas: I) The fundamentals and significance of biofilm in plant and soil health, and the concept of mono and mixed biofilms by PGPR and fungal biofilms. II) Biochemical and molecular mechanisms in biofilm studies in plant associated bacteria, and techniques in studying biofilms and their characterization, gene expression and enhanced antimicrobial resistance in biofilms, as well as biotic and biotic factors affecting biofilm in vitro. III) The ecological significance of soil associated biofilms and stress management and bioremediation of contaminated soils and degraded ecosystems. IV) Pathogenic biofilm associated with plant and food and its control measures. This book is recommended for students and researchers working in agricultural and environmental microbiology, biotechnology, soil sciences, soil and plant health and plant protection. Researchers working in the area of quorum sensing, biofilm applications, and understanding microbiome of soil and plants will also find it useful.
Download or read book Biodegradation written by Rolando Chamy and published by BoD – Books on Demand. This book was released on 2013-06-14 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains a collection of different biodegradation research activities where biological processes take place. The book has two main sections: A) Polymers and Surfactants Biodegradation and B) Biodegradation: Microbial Behaviour.
Download or read book Microbial Biofilms in Bioremediation and Wastewater Treatment written by Y.V. Nancharaiah and published by CRC Press. This book was released on 2019-10-18 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biofilms represent the natural living style of microbial communities and play a pivotal role in biogeochemical cycles and natural attenuation. Biofilms can be engineered for biodegradation and biotransformation of organic and inorganic contaminants, for both in situ bioremediation and ex situ treatment in bioreactors. This book focuses on microbial biofilms and their potential technological applications for sustainable development. It covers recent advances in biofilm technologies for contaminant remediation coupled to recovery of resources and serves as a complete reference on the science and technology behind biofilm mediated bioremediation and wastewater treatment.
Download or read book Encyclopedia of Agrophysics written by Jan Gliński and published by Springer Science & Business Media. This book was released on 2011-06-07 with total page 1075 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Encyclopedia of Agrophysics will provide up-to-date information on the physical properties and processes affecting the quality of the environment and plant production. It will be a "first-up" volume which will nicely complement the recently published Encyclopedia of Soil Science, (November 2007) which was published in the same series. In a single authoritative volume a collection of about 250 informative articles and ca 400 glossary terms covering all aspects of agrophysics will be presented. The authors will be renowned specialists in various aspects in agrophysics from a wide variety of countries. Agrophysics is important both for research and practical use not only in agriculture, but also in areas like environmental science, land reclamation, food processing etc. Agrophysics is a relatively new interdisciplinary field closely related to Agrochemistry, Agrobiology, Agroclimatology and Agroecology. Nowadays it has been fully accepted as an agricultural and environmental discipline. As such this Encyclopedia volume will be an indispensable working tool for scientists and practitioners from different disciplines, like agriculture, soil science, geosciences, environmental science, geography, and engineering.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plastics from Bacteria written by George Guo-Qiang Chen and published by Springer Science & Business Media. This book was released on 2009-12-02 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the possibility that petroleum supplies will be exhausted in the next decades to come, more and more attention has been paid to the production of bacterial pl- tics including polyhydroxyalkanoates (PHA), polylactic acid (PLA), poly(butylene succinate) (PBS), biopolyethylene (PE), poly(trimethylene terephthalate) (PTT), and poly(p-phenylene) (PPP). These are well-studied polymers containing at least one monomer synthesized via bacterial transformation. Among them, PHA, PLA and PBS are well known for their biodegradability, whereas PE, PTT and PPP are probably less biodegradable or are less studied in terms of their biodegradability. Over the past years, their properties and appli- tions have been studied in detail and products have been developed. Physical and chemical modifications to reduce their cost or to improve their properties have been conducted. PHA is the only biopolyester family completely synthesized by biological means. They have been investigated by microbiologists, molecular biologists, b- chemists, chemical engineers, chemists, polymer experts, and medical researchers for many years. PHA applications as bioplastics, fine chemicals, implant biomate- als, medicines, and biofuels have been developed. Companies have been est- lished for or involved in PHA related R&D as well as large scale production. It has become clear that PHA and its related technologies form an industrial value chain in fermentation, materials, feeds, and energy to medical fields.
Download or read book Soil Bioremediation written by Javid A. Parray and published by John Wiley & Sons. This book was released on 2021-03-22 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: SOIL BIOREMEDIATION A practical guide to the environmentally sustainable bioremediation of soil Soil Bioremediation: An Approach Towards Sustainable Technology provides the first comprehensive discussion of sustainable and effective techniques for soil bioremediation involving microbes. Presenting established and updated research on emerging trends in bioremediation, this book provides contributions from both experimental and numerical researchers who provide reports on significant field trials. Soil Bioremediation instructs the reader on several different environmentally friendly bioremediation techniques, including: Bio-sorption Bio-augmentation Bio-stimulation Emphasizing molecular approaches and biosynthetic pathways of microbes, this one-of-a-kind reference focuses heavily on the role of microbes in the degradation and removal of xenobiotic substances from the environment and presents a unique management and conservation perspective in the field of environmental microbiology. Soil Bioremediation is perfect for undergraduate students in the fields of environmental science, microbiology, limnology, freshwater ecology and microbial biotechnology. It is also invaluable for researchers and scientists working in the areas of environmental science, environmental microbiology, and waste management.
Download or read book Assisted Phytoremediation written by Vimal Chandra Pandey and published by Elsevier. This book was released on 2021-09-21 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: Assisted Phytoremediaion covers a wide range of uses of plants for remediation of environmental pollutants. It includes coverage of such techniques as root engineering, transgenic plants, increasing the biomass, use of genetic engineering and genome editing technology for rapid phytoremediation of pollutants. In order to improve the efficiency of plant remediation, genetic engineering plays a vital role in the overexpression of genes or gene clusters, which are responsible for degradation and uptake of pollutants. The book presents state-of-the-art techniques of assisted phytoremediation to better manage soil and water pollution in large amounts. This book is a valuable resource for researchers, students, and engineers in environmental science and bioengineering, with case studies and state-of-the-art research from eminent global scientists. This book serves as an excellent basis from which scientific knowledge can grow and widen in the field of environmental remediation. - Provides a clear picture of how to design, tune, and implement assisted phytoremediation techniques - Offers a comprehensive analysis of current perspective and state-of-the-art applications of assisted phytoremediation - Introduces the potential of genetic engineering as a rapid, cost-effective technology for environmental remediation using plants
Download or read book Cellular Ecophysiology of Microbe written by Tino Krell and published by Springer. This book was released on 2018-03-24 with total page 585 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book assembles concisely written chapters by world-leaders in the field summarizing recent advances in understanding microbial responses to hydrocarbons. Subjects treated include mechanisms of sensing, hydrocarbon tolerance and degradation as well as an overview on hydrophobic modification of biomolecules. Other chapters are dedicated to issues related to the reduced bioavailability of hydrocarbons, which differentiates this class of compounds form many others, but which of central importance to understand the ecophysiological consequences. This book should be standard literature in any laboratory working in this area.
Download or read book Microbial Action on Hydrocarbons written by Vivek Kumar and published by Springer. This book was released on 2019-02-08 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book discusses ways to overcome the side effects of using hydrocarbon-based products as energy sources. Hydrocarbons produce raw crude oil waste of around 600,000 metric tons per annum, with a range of uncertainty of 200,000 metric tons per year. The various chapters in this book focus on approaches to reduce these wastes through the application of potential microbes, in a process called bioremediation. The book is a one-stop reference resource on the methods, mechanisms and application of the bio-composites, in the laboratory and field. Focusing on resolving a very pressing environmental issue, it not only provides details of existing challenges, but also offers deeper insights into the possibility of solving problems using hydrocarbon bioremediation.
