Surfactant Aided Remediation Of Pesticide Contamination In Soils And Transport Of Soil Colloids Within Porous Media
DOWNLOAD
Download Surfactant Aided Remediation Of Pesticide Contamination In Soils And Transport Of Soil Colloids Within Porous Media PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Surfactant Aided Remediation Of Pesticide Contamination In Soils And Transport Of Soil Colloids Within Porous Media book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Surfactant Aided Remediation Of Pesticide Contamination In Soils And Transport Of Soil Colloids Within Porous Media
DOWNLOAD
Author : Peng Wang
language : en
Publisher: ProQuest
Release Date : 2008
Surfactant Aided Remediation Of Pesticide Contamination In Soils And Transport Of Soil Colloids Within Porous Media written by Peng Wang and has been published by ProQuest this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Surfactant-aided soil remediation technologies, such as surfactant-aided soil washing and in situ surfactant-enhanced sorption zone systems, have received considerable research attention recently in remediating hydrophobic organic compound (HOC) contamination. Soil particle-size dependent sorption of surfactants and its effect on HOCs partitioning within soil-water-surfactant systems, although critical in understanding the mechanisms by which the HOCs are removed by these systems, has not been studied well. This dissertation systematically investigated the sorption behavior of three surfactants with different charge properties (TritonRTM X-100 (TX), a nonionic surfactant; linear alkylbenzene sodium (LAS); benzalkonium chloride (BC), a cationic surfactant) and two HOCs, represented by the two most commonly used hydrophobic pesticides (atrazine and diuron), onto soils and soil primary size fractions (clay (2mum), silt (2 & sim;50mum), and sand (50mum) size fractions). Special attention was paid to the effect of surfactant sorption on pesticide sorption and desorption. As relevant to HOC fate and transport in soils, soil colloids transport and deposition within porous media was also examined in this study.
Dissertation Abstracts International
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2008
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Dissertations, Academic categories.
Transport And Remediation Of Subsurface Contaminants
DOWNLOAD
Author : David A. Sabatini
language : en
Publisher:
Release Date : 1992
Transport And Remediation Of Subsurface Contaminants written by David A. Sabatini and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Language Arts & Disciplines categories.
Transport and remediation of subsurface contaminants: introduction; Colloid deposition in porous media and an evaluation of bed-media cleaning techniques; Deposition of colloids in porous media: theory and numerical solution; Surface-charge repulsive effects on the mobility of inorganic colloids in subsurface systems; Colloid transport and the gas-water interface in porous media; Colloid remediation in groundwater by polyelectrolyte; Removal of chromate from aqueous strems by ultrafiltration and precipitation; Potential for bacterial remediation of waste sites containing selenium or lead; Heap leaching as a solvent-extraction technique for remediation of metals-contaminated soils; Factors affecting surfactant performance in groundwater remediation applicationsInfluence of surfactant sorption on capillary pressure-saturation relationships; Surfactant-enchanced solubilization of tetrachloroethylene and degradation products in pump and treat remediation; Solubilization and biodegradation of Hydrophobic organic compounds in soil-aqueous systems with nonionic surfactants; sorption of hydrophobic organic compounds and nonionic surfactants with subsurface materials; Field tests of surfactant flooding: mobility control of dense nonaqueous-phase liquids; Landfill leachate effects on transport of organic substances in aquifer materials; Clay and immiscible organic liquids: greater capillary trapping of the organic phase; Exposure assessmnet modeling for hydrocarbon spills into the subsurface: sensitivity to soil properties.
Effects Of Biosurfactants On Remediation Of Soils Contaminated With Pesticides
DOWNLOAD
Author : Özlem Zenginyürek
language : en
Publisher:
Release Date : 2002
Effects Of Biosurfactants On Remediation Of Soils Contaminated With Pesticides written by Özlem Zenginyürek and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Pesticides have played a significant role in increasing food production, and in view of growing worldwide food demand. Nevertheless; some of them have been classified as persistent toxic chemicals. This has resulted in serious concern about environmental contamination. Once a pesticide or toxic chemical find its way in the environment, a major part of it comes in contact with soil. There are several possible sources of pesticide contamination; at manufacturing, storage, or user sites. The most serious examples of pesticide contamination are typically the result of poor production and waste management practices of pesticide manufacturing, formulation, and application facilities. Improper storage, handling, and also have resulted in pesticide contamination at these sites and at landfills. Today, many remediation technologies are used to remove the pesticides from the soil. One of the soil treatment methods is enhanced biodegradation. Bioremediation of the soil has often proven to be a cheap solution for contaminated soil problem. This research was conducted to investigate the effectiveness of biologically produced surfactants (biosurfactants) on the biodegradation of pesticide-contaminated soil and evaluate the potential for biosurfactant-enhanced bioavailability of pesticide in soil. In order to determine the effectiveness of biosurfactants on pesticides, sophorolipid and rhamnolipid type biosurfactants were used. These biosurfactants were chosen since they are well characterized and their stimulating effect on the biodegradation of hydrophobic substrates was described in the literature. In this study, endosulfan and trifluralin were selected as pesticides. The study was performed in two stages in laboratory conditions. In the first part of the experiment, degradation of endosulfan-contaminated soil was studied by the presence of sophorolipid and in the second part of the experiment; rhamnolipid (JBR 425) was used on the removal of trifluralin-contaminated soil. Throughout the experiment, three different concentrations of sophorolipid and rhamnolipid were applied to soil which, are 0.98, 9.75 and 195 ppm for sophorolipid and 1.6, 100 and 1000 ppm for rhamnolipid. The effectiveness of synthetic or microbial surfactants on biodegradation of chemicals has been investigated by many researchers. However, studies about the biosurfactant enhanced soil remediation for the pesticide contaminants are limited. Besides that, the outcome of surfactant applications has been highly system-specific, conflicting results reported in the literature. Therefore, despite the general trends outlined in literature, the effect of biosurfactants on the biodegradation of organic compounds is poorly understood. Opposed effects are frequently observed. This study is the first M.Sc. thesis study about the use of biosurfactant enhanced bioremediation of pesticides in Turkey. The results from first part of our study obtained from sophorolipid, were not satisfactory since the degradation patterns for endosulfan were not affected by the presence of sophorolipid. According to the second experiment results, removal of trifluralin ranged from 24-35 %, with the increase in rhamnolipid concentrations. Addition of rhamnolipid (JBR 425) into the soil was found to increase the degradation rate of trifluralin by 13 % as compared to the control soil column. Additional time would probably increase the rate of degradation and bioavailability, as a result of providing the adaptation of microorganisms in contaminated soil media and formation of more bioavailable metabolites.
Effects Of Anionic And Nonionic Surfactant Mixtures On Bacterial Transport Through Unsaturated Porous Media
DOWNLOAD
Author : Shweta Tripathi
language : en
Publisher:
Release Date : 2007
Effects Of Anionic And Nonionic Surfactant Mixtures On Bacterial Transport Through Unsaturated Porous Media written by Shweta Tripathi 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.
A key aspect of the contamination of groundwater by pathogenic organisms is their transport through both unsaturated and saturated soils. An important source of these pathogens is domestic wastewater, which is released to the soil environment from on-site wastewater treatment systems, such as septic tanks. Surfactants---a major component of consumer detergents---are also present in domestic wastewater and have the potential to significantly enhance the transport of microorganisms through both unsaturated and saturated soils. The goal of this study was to explore how the surfactants present in domestic wastewater effect the bacterial transport through unsaturated porous media.
Remediation Of Petroleum Contaminated Soils
DOWNLOAD
Author : David J. Friend
language : en
Publisher: Transportation Research Board
Release Date : 1996
Remediation Of Petroleum Contaminated Soils written by David J. Friend and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Technology & Engineering categories.
This synthesis will be of interest to state transportation personnel involved with project planning and location (administrative and regulatory personnel), design staff (general civil, geotechnical, and environmental engineers), and project managers (construction and maintenance engineers and staff). It will also be of interest to federal and state environmental agencies and to environmental consultants and contractors as well as to trainers in the field of petroleum-contaminated soil remediation. This synthesis describes the remedial technologies that may be available to transportation agencies faced with the regulatory responsibility to clean or remediate petroleum-contaminated soils in the vadose zone (unsaturated soils above the groundwater table) at a particular site as well as the state of the practice within the agencies. This report of the Transportation Research Board describes the applicability and cost-effectiveness of alternate technologies to remediate petroleum-contaminated soil. Practices currently being used by state transportation agencies to remediate petroleum-contaminated soils, both on site and off site are also described. This summary of transportation agency practice complements the limited telephone survey of soil remediation techniques that was performed in preparing NCHRP Report 351, Hazardous Wastes in Highway Rights-of-Way.
Surfactants And Their Applications For Remediation Of Hydrophobic Organic Contaminants In Soils
DOWNLOAD
Author : Roger Saint-Fort
language : en
Publisher:
Release Date : 2019
Surfactants And Their Applications For Remediation Of Hydrophobic Organic Contaminants In Soils written by Roger Saint-Fort and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Electronic books categories.
Soil contaminated with ubiquitous hydrophobic organic contaminants (HOCs) is a worldwide recurring concern arising from their indiscriminate disposal, improper management, and accidental spills. A wide range of traditional remedial strategies have been the common practice. However, these treatment methods have become cost prohibitive, not environmental friendly, and less accepted by society. Surfactant-enhanced remediation technology represents a cost-effective and green technology alternative to remediate such contaminated sites. Surfactant remediation technologies are conducted in-situ or ex-situ as two broad categories, or in combination. Among these technologies are soil flushing, washing, phytoremediation, and bioremediation. More applied research continues to quantify the efficiency of surfactant-enhanced mass transfer phase using a single surfactant solution while their binary blends to remove mixed HOCs in soils are also a focus of interest for research. There is a great potential to develop novel synthetic and biosurfactants that will exhibit higher biodegradability, less toxicity, higher removal efficiency, more economical and more recyclable. This work thus provides a review of the applications and importance of surfactant-enhanced remediation of soil contaminated with HOCs. Relevant environmental factors, soil properties, surfactant chemistry, mechanisms, mass transfer phase, and field designs are summarized and discussed with purposes of providing greater context and understanding of surfactant-enhanced remediation systems.
Surfactants In Agrochemicals
DOWNLOAD
Author : TharwatF. Tadros
language : en
Publisher: Routledge
Release Date : 2018-03-29
Surfactants In Agrochemicals written by TharwatF. Tadros and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-03-29 with Science categories.
This work highlights the physical chemistry of surfactant solutions, detailing a fundamental method of selecting surfactants for agrochemical formulations and delineating how surfactants enhance the biological efficacy of agrochemicals. The unique properties of surfactants that have a major influence on the performance of an agrochemical are summarized.;The book is intended for physical, surface and colloid chemists; biochemists; microbiologists; agronomists; research and development personnel in the pesticide and fertilizer industries; and upper-level undergraduate and graduate students taking chemistry and chemical engineering courses.;College and university bookstores may order five or more copies at a special price which is available on request from Marcel Dekker Inc.
Bibliography Of Agriculture
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1996
Bibliography Of Agriculture 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 Agriculture categories.
Characterization And Surfactant Enhanced Remediation Of Organic Contaminants In Saturated Porous Media
DOWNLOAD
Author : Tammy Palmer Taylor
language : en
Publisher:
Release Date : 1999
Characterization And Surfactant Enhanced Remediation Of Organic Contaminants In Saturated Porous Media written by Tammy Palmer Taylor and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Organic water pollutants categories.