Enhanced Bioremediation of a Soil Contaminated with Both Petroleum Hydrocarbons and Heavy Metals with In-soil Biosurfactant Production PDF Download
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Author: Faramarz Jalali
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Soils that are co-contaminated with petroleum hydrocarbons and metals account for 55% of all hazardous waste sites and are hard to decontaminate because of the different nature of the remedial treatment required. Biosurfactant-producing microorganisms are present in many environments and can be stimulated to produce them under favorable conditions. This dissertation investigates the effect of biosurfactant production by indigenous microorganisms of a co-contaminated soil. A soil that was heavily contaminated with petroleum hydrocarbons and metals was acquired from the Toronto Harbour area. Phase one of the study evaluated the extent of the biodegradation of organic pollutants as well as the feasibility of biosurfactant production by the produced microorganisms. Results show that by the end of the experiment (50 days) batches amended with nutrients produced biosurfactants up to 3 times their critical micelle concentration (CMC). The produced surfactants caused the concentration of TPH and metals in the filtrate to increase from 2 to 8% and from 2 to 4%, respectively. In the phase two of the experiments the production of biosurfactants was enhanced by 40% by limiting the inorganic source of nitrogen in the batches, following a short growth phase. The produced biosurfactants were able to wash 10% of TPH and 6% of the metal content of the soil. The results indicate that biosurfactants can be produced by the indigenous soil microorganisms using organic contaminants as the sole carbon source. Furthermore, the produced biosurfactants showed potential to enhance biodegradation of petroleum hydrocarbons as well as to improve flushing of the remaining soil pollutant from soil.
Author: Faramarz Jalali
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Soils that are co-contaminated with petroleum hydrocarbons and metals account for 55% of all hazardous waste sites and are hard to decontaminate because of the different nature of the remedial treatment required. Biosurfactant-producing microorganisms are present in many environments and can be stimulated to produce them under favorable conditions. This dissertation investigates the effect of biosurfactant production by indigenous microorganisms of a co-contaminated soil. A soil that was heavily contaminated with petroleum hydrocarbons and metals was acquired from the Toronto Harbour area. Phase one of the study evaluated the extent of the biodegradation of organic pollutants as well as the feasibility of biosurfactant production by the produced microorganisms. Results show that by the end of the experiment (50 days) batches amended with nutrients produced biosurfactants up to 3 times their critical micelle concentration (CMC). The produced surfactants caused the concentration of TPH and metals in the filtrate to increase from 2 to 8% and from 2 to 4%, respectively. In the phase two of the experiments the production of biosurfactants was enhanced by 40% by limiting the inorganic source of nitrogen in the batches, following a short growth phase. The produced biosurfactants were able to wash 10% of TPH and 6% of the metal content of the soil. The results indicate that biosurfactants can be produced by the indigenous soil microorganisms using organic contaminants as the sole carbon source. Furthermore, the produced biosurfactants showed potential to enhance biodegradation of petroleum hydrocarbons as well as to improve flushing of the remaining soil pollutant from soil.
Author: Clementina Oghenekevwe Okoro
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Geoffrey M. Gadd
Publisher: Cambridge University Press
ISBN: 9780521781190
Category : Nature
Languages : en
Pages : 408
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Book Description
An authoritative account of the application of fungi to the treatment of environmental pollution.
Author: Catherine N. Mulligan
Publisher: CRC Press
ISBN: 1466518243
Category : Medical
Languages : en
Pages : 346
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Book Description
Microbially derived surfactants, called biosurfactants, provide a promising alternative to synthetic surfactants, displaying better availability and being generally nontoxic and biodegradable. Biosurfactants also have the advantage of diverse chemical properties and the potential to be less expensive. They demonstrate properties such as reducing su
Author: Yongming Luo
Publisher: Springer
ISBN: 9811060290
Category : Nature
Languages : en
Pages : 814
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Book Description
This book reviews the progresses and achievements made in the past 20 years of research on soil pollution and remediation in China, and presents 50 review and research articles from all over China, including Hong Kong and Taiwan. The authors include scientists, engineers, entrepreneurs and managers from 26 universities, 18 institutes, 4 leading enterprises and 2 government environmental protection departments. The contents cover fundamental research on soil pollution and remediation, technical development, project demonstration, policy and governance. The polluted soil/site types include farmland, industrial sites, mining areas and oilfields, with heavy metals (cadmium, arsenic, copper, chromium, mercury, lead, zinc, nickel, etc.), organic pollutants (PAHs, PCBs, organochlorine pesticides, phthalate esters, halogenated hydrocarbons, etc.), and metal–organic mixed pollutants. The remediation techniques mainly include physical and chemical remediation (thermal desorption, soil vapor extraction, in situ advanced chemical oxidation, solidification and stabilization), phytoremediation (phytostabilization, phytoextraction by hyperaccumulators, phyto-prevention by low accumulation plants), bioremediation (microbial adsorption and immobilization, microbial degradation, microbe-enhanced phytoremediation), and combined remediation merging multiple technologies. The governance and policy section mainly explores laws and regulations, criteria and standards, financial guarantees and the industrial market for soil environment and pollution prevention.
Author: Ajay Singh
Publisher: Springer Science & Business Media
ISBN: 3662057948
Category : Nature
Languages : en
Pages : 312
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Book Description
The huge expansion of the chemical and petroleum industries in the twentieth century has resulted in the production of a vast array of chem ical compounds and materials that have transformed our lives. The associated large-scale manufacturing, processing and handling activi ties have caused a serious deterioration in environmental quality and created threats to human health. These negative impacts have led to responses and regulations requiring remedial action in support of envi ronmental sustainability. of biotechnological methods through bioremediation, Application has gained prominence as an option for soil remediation methods. Bioremediation is a multidisciplinary approach where biologists, chem ists, soil scientists and engineers work as team to develop and imple ment remediation processes. Bioremediation has now been used successfully to remediate many petroleum-contaminated sites. However, there are as yet no commercial technologies commonly used to reme diate the most recalcitrant contaminants. Nevertheless, bioremediation is a rapidly advancing field and new bio-based remedial technologies are continuing to emerge.
Author: Rajesh Kumar
Publisher: Springer
ISBN: 9811312893
Category : Medical
Languages : en
Pages : 146
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Book Description
This book highlights the recent developments on rhamnolipid biosurfactant, its properties, role on the natural environment and various applications. Recently, it has shown promising application in Environment, Agriculture, food, petroleum, and pharmaceutical industries due to its environment-friendly and easily degradable nature. The book emphasizes on the various techniques that are utilized for the detection and isolation of rhamnolipid biosurfactant from microorganisms. It highlights the various aspects of the rhamnolipid biosurfactants including structural characteristics, production, and its application. The book presents the current knowledge and the latest advances in the function-based metagenomics strategies to facilitate the exploration of the novel biosurfactants.
Author: Eve Riser-Roberts
Publisher: CRC Press
ISBN: 9781420050578
Category : Science
Languages : en
Pages : 580
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Book Description
This book combines the results of current research with essential background material to provide complete, in-depth coverage of every aspect of in situ and ex situ bioremediation, as well as an extensive overview of the physical and chemical processes currently available for treating petroleum-contaminated soils. Critical information has been collected and assembled under one cover to provide a convenient reference for anyone who must contend with this worldwide problem. Remediation of Petroleum Contaminated Soils: Biological, Physical, and Chemical Processes describes how to optimize the biodegradation of petroleum hydrocarbons in soil-water systems. It reports on the susceptibility of various petroleum components to biodegradation by microorganisms, and considers all groups of microorganisms for their potential contributions. The book also deals with problem areas such as the transport of organisms, oxygen, or nutrients throughout the subsurface, as well as biodegradation of polynuclear aromatic hydrocarbons (PAHs) and nonaqueous phase liquids (NAPLs). In addition, the book presents a variety of methods for monitoring bioremediation. This reference discusses current soil remediation processes and includes many innovative approaches. It also investigates means of controlling volatile organic compounds (VOCs) and leachate, and addresses methods for collecting and treating these secondary waste streams. The expansive coverage of this book will furnish readers with a wide range of options for developing treatment strategies and for customizing procedures for specific requirements.
Author: Inamuddin
Publisher: Elsevier
ISBN: 0128232846
Category : Technology & Engineering
Languages : en
Pages : 460
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Book Description
Green Sustainable Process for Chemical and Environmental Engineering and Science: Biosurfactants for the Bioremediation of Polluted Environments explores the use of biosurfactants in remediation initiatives, reviewing knowledge surrounding the creation and application of biosurfactants for addressing issues related to the release of toxic substances in ecosystems. Sections cover their production, assessment and optimization for bioremediation, varied pollutant degradation applications, and a range of contaminants and ecological sites. As awareness and efforts to develop greener products and processes continues to grow, biosurfactants are garnering more attention for the potential roles they can play in reducing the use and production of more toxic products. Drawing on the knowledge of its expert team of global contributors, this book provides useful insights for all those currently or potentially interested in developing or applying biosurfactants in their own work. - Provides an accessible introduction to biosurfactant chemistry - Highlights the optimization, modeling, prediction and kinetics of key factors supporting biosurfactant-enhanced biodegradation processes - Explores a wide range of biosurfactant applications for remediation and degradation of pollutants
Author: Surajit Das
Publisher: Elsevier
ISBN: 0128004827
Category : Science
Languages : en
Pages : 641
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Book Description
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
