Download or read book Microemulsions Enhanced Bioremediation of Polycyclic Aromatic Hydrocarbons PAHs Contaminated Soil Using Composting Technology written by Siu Yi Wong and published by . This book was released on 2011 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bioremediation of Polycyclic Aromatic Hydrocarbons PAHs contaminated Soil written by Tahseen A. S. Sayara and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biosurfactant Enhanced Bioremediation of Polycyclic Aromatic Hydrocarbon Contaminated Environmental Media written by Bezza Fisseha Andualem and published by . This book was released on 2015 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polycyclic aromatic hydrocarbons (PAHs) are a diverse class of toxicants that are ubiquitously and persistently present in the environment. These compounds present a risk for human health and the environment, as they are mutagens, carcinogens and teratogens. Bioremediation has shown promise as a potentially effective and low-cost treatment option, but concerns about the slow process rate and bioavailability limitations have hampered more widespread use of this technology. In the fundamental work of this thesis a series of experiments was designed utilizing the biosurfactant produced by Pseudomonas aeruginosa LBP5, LBP9 and CB1. Specifically, these experiments were designed to determine if the presence of various levels of partially purified biosurfactants produced by the isolates, would affect the degradation of a range of PAHs. The biodegradation and biotransformation of PAHs were studied in three bioremedial systems: soil slurry, liquid culture experiments with enriched consortium on PAHs from petroleum contaminated sites and Bioslurry reactor study with autochthonous consortium. Biosurfactant-producing and polycyclic aromatic hydrocarbon degrading microorganisms were isolated from petroleum-contaminated crane service station soil and creosote contaminated wood treatment plant soils in Pretoria area. Bacterial isolates LBP9 and LBP5 isolated from crane service station soil and isolates CB1, CN2, CN3, CN5 isolated from creosote contaminated soil were found to be the most efficient biosurfactant producing strains. The biosurfactant produced by the strains LBP9, LBP5 and CB1 were extracted and characterized by attenuated total reflectance Fourier transform infrared spectroscopy (ATR FTIR) and Thin layer chromatography (TLC). Evaluation of the ability of the LBP9 biosurfactant for applications in enhancing biodegradation of mixed polycyclic aromatic hydrocarbons (PAHs) with a consortium of bacteria indicated that the biosurfactant was able to enhance the removal of significant amount of PAHs from the liquid culture medium at different concentrations. In this study at 400 mg/L amendment of lipopeptide the solubility of Phenanthrene, Fluoranthene and Pyrene was increased to 19.4, 33 and 45.4 times their aqueous solubility, respectively, and the extent of substrate utilization rate of the PAHs was enhanced up to 3 fold in the sole substrate microcosms. A second goal of these experiments was to discern the efficacy of exogenous lipopeptide application and stimulation of in situ biosurfactant production through biostimulation / nutrient amendments in the removing of polycyclic aromatic hydrocarbons (PAH) from creosote PAH contaminated soil. This work also suggests that it may be more practical to stimulate indigenous biosurfactant production within a soil than to add pre-purified compound. In general, the results presented in the studies show the potential of biosurfactants in assisting the bioremediation of polycyclic aromatic hydrocarbon contaminated environmental media in a reasonable timeframe.

Download or read book The Utilization of Bioremediation to Reduce Soil Contamination Problems and Solutions written by Václav Sasek and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traditional reliance on chemical analysis to understand the direction and extent of treatment in a bioremediation process has been found to be inadequate. Whereas the goal of bioremediation is toxicity reduction, few direct, reliable measures of this process are as yet available. Another area of intense discussion is the assessment of market forces contributing to the acceptability of bioremediation. Finally, another important component is a series of lectures and lively exchanges devoted to practical applications of different bioremediation technologies. The range of subjects covers a wide spectrum, encompassing emerging technologies as well as actual, full-scale operations. Examples discussed include landfarming, biopiling, composting, phytoremediation and mycoremediation. Each technology is explored for its utility and capability to provide desired treatment goals. Advantages and limitations of each technology are discussed. The concept of natural attenuation is also critically evaluated since in some cases where time to remediation is not a significant factor, it may be an alternative to active bioremediation operations.

Download or read book Biosurfactants New Insights in their Biosynthesis Production and Applications written by Gloria Soberón-Chávez and published by Frontiers Media SA. This book was released on 2022-01-24 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bioremediation of a PAH contaminated Soil Using Composting Technology written by Aderonke Adenuga and published by . This book was released on 1992 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Enhancing Biodegradation After Bioremediation of Polycyclic Aromatic Hydrocarbons in Soil written by Wei-Chih Tang and published by . This book was released on 2003 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bioremediation of Polycyclic Aromatic Hydrocarbons Contaminated Soil written by Abdullah Noorlidah and published by LAP Lambert Academic Publishing. This book was released on 2015-05-11 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The necessity to find sound solutions for soil pollution is intensifying due to polycyclic aromatic hydrocarbons' (PAH) toxicity and hydrophobic nature. Most reported work utilised single treatment approach but combination of multiple techniques in bioremediation is scarce. This book presents a vermitechnology study on development of an innovative tri-layer treatment for PAHs contaminated soil. The treatment therefore, provides a new insight of an environmentally sound approach particularly for on-site solution. The analysis should help shed some light on this integrative solution and should be especially useful to professionals in Environmental Science and Engineering fields, or everyone else who may be considering bioremediation techniques.

Download or read book Bioremediation of Poly aromatic Hydrocarbon PAH Contaminated Soil by Co composting written by Nadine Loick and published by . This book was released on 2008 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Rhizoremediation as a Treatment Technology in the Removal of Polycyclic Aromatic Hydrocarbons PAHs from the Environment written by Itumeleng Phyllis Molobela and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous classes and types of chemicals, which contaminate soil, complicate the removal of many toxic compounds from the environment. For example, many soils are contaminated with one or more metals, radioactive and inorganic compounds. Large areas are polluted with recalcitrant organic substances that pose environmental problems due to their toxicity and tendency to disperse through wind and water errosion. Polycyclic aromatic Hydrocarbons (PAHs) are ubiquitous pollutants found in soil at wood preservation plants and gasworks. PAHs are chemical compounds that persist in the environment and thus cause pollution worldwide. Their persistence in the environment is due to their low water solubility. The major source of PAHs is from the combustion of organic material such as coal, tar, wood and rubber. PAHs have been detected in a wide variety of environmental samples including air, soil, sediments, water, oils, tars and foodstuff. Most people are exposed to PAHs when they breathe smoke, autoemissions or industrial fumes. Because PAHs are toxic, mutagenic and carcinogenic to humans and animals, their elimination from the environment is of paramount importance. The estimated costs for the clean up of PAHs contaminated sites with conventional techniques such as incineration and landfilling are enormous. The search for alternative methods to restore polluted sites in a less expensive, less labour intensive, safe and environmentally friendly way is required. Such an alternative method is rhizoremediation, which is defined as the use of plants in association with microorganisms to degrade environmental pollutants such as PAHs. Microbial communities exposed to hydrocarbons become adapted, exhibiting selective enrichment and genetic changes resulting in an increased proportion of hydrocarbon degrading bacteria and bacteria plasmid encoding hydrocarbon catabolic genes. Adapted microbial communities have higher proportions of hydrocarbon degraders that can respond to the presence of hydrocarbon pollutants. The aim of this study was to identify bacteria isolated from the rhizosphere of Elusine coracana, Biddens pilosa, Brantha serratia and Cyperus esculentus grown in polluted and unpolluted soil and to evaluate the potential of bacteria isolated from the rhizosphere of these plants grown in polluted soil for their ability to bioremediate Polycyclic aromatic Hydrocarbons (PAHs). Different concentrations (1%, 3% and 5%) of naphthalene and acenaphthene (PAHs) were made and added to 500ml Bacteriological agar. 1000 l of bacterial suspensions were spread onto the surface of naphthalene and acenaphthene-based agar plates and incubated for 48h at 37OC. Results showed that Brevibacillus brevis, Brevindimonas versicularis, Vibrio vulnificus, Chryseo indologenes, Micrococcus spp, Bacillus stearothermophilus, Pseudomonas putida and Pseudomonas spinosa showed excellent growth in all concentrations in naphthalene based agar medium. However, Micrococcus spp and Pseudomonas spinosa showed limited growth in acenaphthene based agar medium. Amongst all these bacteria tested for their potential in utilizing PAHs, B. brevis, V. vulnificus, C. indologenes, B. stearothermophilus, and P. putida were the most promising for biodegradation of PAHs, since none of them were affected by any change in concentration either in naphthalene or acenaphthene.

Download or read book Phytoremediation of Polycyclic Aromatic Hydrocarbons PAHs Contaminated Soil written by Anithadevi Kenday Sivaram and published by . This book was released on 2014 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: The success of phytoremediation technique is determined by the selection of efficient plant species suitable for the removal of the contaminants. Therefore, suitable plant species have been screened for their ability to withstand and degrade PAHs in contaminated soils. Hence in this study, the phytoremediation potential of 14 different plant species comprising nine plants with C3 photosynthetic pathway and five plants with C4photosynthetic pathway in remediation of B[a]P and pyrene contaminated soils was investigated. A green house experiment was conducted for 50 days to measure the changes in physiological, biochemical parameters, bioaccumulation and degradation ability of plants in soils spiked with 48 mg kg-1 and 194 mg kg-1 of B[a]P and PYR, respectively. The performances of C4 plants were observed to be better than C3 plants in terms of biochemical and physiological parameters.

Download or read book Index Medicus written by and published by . This book was released on 2002 with total page 1480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.

Download or read book Pollution Abstracts written by and published by . This book was released on 1997 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Contaminants in the Subsurface written by National Research Council and published by National Academies Press. This book was released on 2005-04-23 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: At hundreds of thousands of commercial, industrial, and military sites across the country, subsurface materials including groundwater are contaminated with chemical waste. The last decade has seen growing interest in using aggressive source remediation technologies to remove contaminants from the subsurface, but there is limited understanding of (1) the effectiveness of these technologies and (2) the overall effect of mass removal on groundwater quality. This report reviews the suite of technologies available for source remediation and their ability to reach a variety of cleanup goals, from meeting regulatory standards for groundwater to reducing costs. The report proposes elements of a protocol for accomplishing source remediation that should enable project managers to decide whether and how to pursue source remediation at their sites.

Download or read book Advances in Bioremediation of Wastewater and Polluted Soil written by Naofumi Shiomi and published by BoD – Books on Demand. This book was released on 2015-09-09 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pollution of soil and groundwater by heavy metals and other chemicals is becoming a serious issue in many countries. However, the current bioremediation processes do not often achieve sufficient remediation, and more effective processes are desired. This book deals with advances in the bioremediation of polluted soil and groundwater. In the former chapters of this book, respected researchers in this field describe how the optimization of microorganisms, enzymes, absorbents, additives and injection procedures can help to realize excellent bioremediation. In the latter chapters, other researchers introduce bioremediation processes that have been performed in the field and novel bioremediation processes. Thus, the readers will be able to obtain new ideas about effective bioremediation as well as important information about recent advances in bioremediation.

Download or read book Environmental Degradation Causes and Remediation Strategies written by Vinod Kumar and published by Agro Environ Media, Publication Cell of AESA, Agriculture and Environmental Science Academy,. This book was released on 2020-03-10 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The compliance of this book is helpful for academicians, researchers, students, as well as other people seeking the relevant material in current trends of studies on the topic of environmental degradation.

Download or read book Biodegradation and Bioconversion of Hydrocarbons written by Kirsten Heimann and published by Springer. This book was released on 2016-11-10 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book details three main topics: the screening and characterization of hydrocarbons from air, soil and water; technologies in the biodegradation of hydrocarbons; and the bioconversion of hydrocarbons for biofuel/chemicals, as well as recent developments in the remediation of hydrocarbons and their environmental benefits. The first section focuses on screening methods, qualitative and quantitative analysis of hydrocarbons from soil, air and water environments, speciation of hydrocarbons, and natural bioremediation strategies in such environments. The second section examines technologies for removing hydrocarbon contaminants from various environments, especially advanced technologies for the removal of hydrocarbons and in-situ and ex-situ remediation strategies and problems, as well as concrete case studies. The last section, covering the bioconversion of hydrocarbons for biofuel/chemicals, highlights the biochemicals and bioproducts developed from hydrocarbons, with a particular focus on biochemical and chemical technologies used to produce biopolymers, biofuel precursors and commodity chemicals from hydrocarbons.