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Effect Of Surfactants On The Sorption And Transport Of Cuii In A Sandy Soil Batch Column Experiments And Modeling
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Book Synopsis Effect of Surfactants on the Sorption and Transport of Cu(II) in a Sandy Soil by : Qiao Li
Download or read book Effect of Surfactants on the Sorption and Transport of Cu(II) in a Sandy Soil written by Qiao Li and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, surfactants have shown some potential for remediation of heavy metal contaminated soil, although research in this area has been limited. Batch and column studies were conducted to investigate the sorption processes and transport behavior of Cu(II) in a sandy soil in the presence of surfactants. SDS (sodium dodecyl sulfate) and Triton X-100 were chosen as representatives of an anionic surfactant and a nonionic surfactant, respectively. Results showed that the anionic surfactant (SDS) significantly decreased the retention of Cu(II) in the sandy soil and was more effective in removal of Cu(III) than the nonionic surfactant (Triton X-100) in the both batch and column experiments. Further, both SDS and Triton X-100 appeared more effective in removing Cu(II) under increasing acidic conditions. Description of the sorption process and transport of heavy metals is necessary for identifying the fate of heavy metals in soils. The batch-generated sorption isotherms were found to be quantitatively higher than those calculated in columns. The sorption processes of Cu(III) in the soil column showed a strong nonequilibrium. Both a first-order kinetic model and a two-region model were not capable of describing the entire experimental breakthrough curve (BIC) in most instances.
Book Synopsis Cationic Surfactant-enhanced Sorption and Nonionic Surfactant-enhanced Solubilization of Hydrophobic Organic Contaminants in Groundwater by : Joel S. Hayworth
Download or read book Cationic Surfactant-enhanced Sorption and Nonionic Surfactant-enhanced Solubilization of Hydrophobic Organic Contaminants in Groundwater written by Joel S. Hayworth and published by . This book was released on 1997 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was conducted to assess the feasibility of using surfactants to immobilize and recover contaminants from groundwater. Before such a remediation method can be employed in the field, a understanding of the complex transport, partitioning behavior, and interactions of the surfactants and in a dynamic groundwater system is required. Batch, column and box aquifer model experiments conducted to investigate the proposed remediation strategy. Also, numerical modeling tools were developed to predict the coupled cationic/nonionic/HOC transport behavior within a dynamic groundwater. Experimental results show that it is feasible to create a stationary cationic surfactant-enhanced in situ within an aquifer. The main criteria for sorbent zone development are a relatively high exchange capacity, a low carbon content, and a relatively homogeneous and permeable aquifer. Numerical simulation results indicate that mass-transfer limiting desorption of the cationic surfactant will likely occur within an enhanced sorbent zone.
Book Synopsis Cationic Surfactant-Enhanced Sorption and Nonionic Surfactant-Enhanced Solubilization of Hydrophobic Organic Contaminants in Groundwater by : Joel S. Hayworth
Download or read book Cationic Surfactant-Enhanced Sorption and Nonionic Surfactant-Enhanced Solubilization of Hydrophobic Organic Contaminants in Groundwater written by Joel S. Hayworth and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was conducted to assess the feasibility of using surfactants to immobilize and recover contaminants from groundwater. Before such a remediation method can be employed in the field, a understanding of the complex transport, partitioning behavior, and interactions of the surfactants and in a dynamic groundwater system is required. Batch, column and box aquifer model experiments conducted to investigate the proposed remediation strategy. Also, numerical modeling tools were developed to predict the coupled cationic/nonionic/HOC transport behavior within a dynamic groundwater. Experimental results show that it is feasible to create a stationary cationic surfactant-enhanced in situ within an aquifer. The main criteria for sorbent zone development are a relatively high exchange capacity, a low carbon content, and a relatively homogeneous and permeable aquifer. Numerical simulation results indicate that mass-transfer limiting desorption of the cationic surfactant will likely occur within an enhanced sorbent zone.
Book Synopsis Surfactant Assisted Removal of Copper (II), Cadmium (II), and Lead (II) from a Sandy Soil by : Hesam Shalchian
Download or read book Surfactant Assisted Removal of Copper (II), Cadmium (II), and Lead (II) from a Sandy Soil written by Hesam Shalchian and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling of Surfactant Transport and Adsorption in Porous Media by :
Download or read book Modeling of Surfactant Transport and Adsorption in Porous Media written by and published by . This book was released on 1991 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: When surfactant solution is flowing in a reservoir formation, surfactants will be diluted by flow dispersion, retained in dead-end pores, adsorbed on rock surfaces, or precipitated due to ion exchange. The loss of surfactant will be detrimental to the performance of gas foam. Information of surfactant concentration profiles in reservoir formations is essential for gas foaming technique development. The major objective of this research is to investigate with mathematical models the transport and dynamic adsorption of surfactants in porous media. The mathematical models have taken into account the convection, dispersion, capacitance, and adsorption effects on concentrations of surfactants. Numerical methods and computer programs have been developed which can be used to match experimental results and to determine the characterization parameters in the models. The models can be included in foam simulation programs to calculate surfactant concentration profiles in porous media. A flow experimental method was developed to measure the effluent surfactant concentration, which will be used to determine the model parameters. Commercial foaming agent Alipal CD-128 was used in this study. Equilibrium adsorption and surfactant precipitation have been tested. Tracer solutions with a nonadsorbing solute such as dextrose and sucrose were used to determine the dispersion parameters for the experimental sandpack; thus, the adsorption of the surfactant in the test sand can be identified with an adequate model. 49 refs., 21 figs.
Book Synopsis Surfactant-aided Remediation of Pesticide Contamination in Soils and Transport of Soil Colloids Within Porous Media by : Peng Wang
Download or read book Surfactant-aided Remediation of Pesticide Contamination in Soils and Transport of Soil Colloids Within Porous Media written by Peng Wang and published by ProQuest. This book was released on 2008 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Sorption and Transport of Selected Nonionic Surfactants in Soil Systems by : Charlotte Anne Martin
Download or read book Sorption and Transport of Selected Nonionic Surfactants in Soil Systems written by Charlotte Anne Martin and published by . This book was released on 2001 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Surfactant Enhanced Washing of Cu (II) and Zn (II) from a Contaminated Sandy Soil by : Xiaojie Li
Download or read book Surfactant Enhanced Washing of Cu (II) and Zn (II) from a Contaminated Sandy Soil written by Xiaojie Li and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Water Content on the Behavior of Surfactants and Hydrophobic Organic Compounds in the Immobilization Zone for Contaminants Retardation by : Jong Soo Cho
Download or read book Effect of Water Content on the Behavior of Surfactants and Hydrophobic Organic Compounds in the Immobilization Zone for Contaminants Retardation written by Jong Soo Cho and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: An immobilization zone can be constructed by modifying soils in the vadose zone with surfactants and, thus, can be used to promote retardation of organic contaminants in the subsurface. Column experiments were conducted to investigate the behavior of surfactants and organic contaminants in unsaturated and saturated conditions with different water contents (25%, 50%, 75%, 100%). The transport and sorption behavior of two surfactants tested (monoalkylated disulfonated diphenyl oxide, dialkylated disulfonated diphenyl oxide) in the columns containing an aluminum oxide were similar under the conditions with different water contents. However, transport of a model organic compound (naphthalene) was retarded as the water content decreased by enhanced partitioning of the compound into the surfactants that were sorbed on the aluminum oxide. This suggests that the immobilization method could well be applied to vadose zone. A transport model, CXTFIT 2.1, was also used to evaluate the behavior of the surfactants and naphthalene.
Book Synopsis Effects of Surfactant Concentration and Sorbent Properties on the Sorption and Transport of Ethoxylated Nonionic Surfactant Mixtures by : T. C. G. Kibbey
Download or read book Effects of Surfactant Concentration and Sorbent Properties on the Sorption and Transport of Ethoxylated Nonionic Surfactant Mixtures written by T. C. G. Kibbey and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geotitles written by and published by . This book was released on 1995 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Surface Charging and Points of Zero Charge by : Marek Kosmulski
Download or read book Surface Charging and Points of Zero Charge written by Marek Kosmulski and published by CRC Press. This book was released on 2009-05-14 with total page 1094 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Most Detailed Resource Available on Points of Zero ChargeWith their work growing in complexity, chemists involved with surface phenomena-related projects have outgrown the common resources available to them on points of zero charge (PZC) of oxides. Reporting on a limited number of materials in a limited number of scenarios, these resources ofte
Book Synopsis Environmental Risk Assessment of Soil Contamination by : Maria C. Hernandez Soriano
Download or read book Environmental Risk Assessment of Soil Contamination written by Maria C. Hernandez Soriano and published by BoD – Books on Demand. This book was released on 2014-03-26 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil is an irreplaceable resource that sustains life on the planet, challenged by food and energy demands of an increasing population. Therefore, soil contamination constitutes a critical issue to be addressed if we are to secure the life quality of present and future generations. Integrated efforts from researchers and policy makers are required to develop sound risk assessment procedures, remediation strategies and sustainable soil management policies. Environmental Risk Assessment of Soil Contamination provides a wide depiction of current research in soil contamination and risk assessment, encompassing reviews and case studies on soil pollution by heavy metals and organic pollutants. The book introduces several innovative approaches for soil remediation and risk assessment, including advances in phytoremediation and implementation of metabolomics in soil sciences.
Book Synopsis User's Guide to PHREEQC by : David L. Parkhurst
Download or read book User's Guide to PHREEQC written by David L. Parkhurst and published by . This book was released on 1995 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Organic Chemistry by : René P. Schwarzenbach
Download or read book Environmental Organic Chemistry written by René P. Schwarzenbach and published by John Wiley & Sons. This book was released on 2005-06-24 with total page 1329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental Organic Chemistry focuses on environmental factors that govern the processes that determine the fate of organic chemicals in natural and engineered systems. The information discovered is then applied to quantitatively assessing the environmental behaviour of organic chemicals. Now in its 2nd edition this book takes a more holistic view on physical-chemical properties of organic compounds. It includes new topics that address aspects of gas/solid partitioning, bioaccumulation, and transformations in the atmosphere. Structures chapters into basic and sophisticated sections Contains illustrative examples, problems and case studies Examines the fundamental aspects of organic, physical and inorganic chemistry - applied to environmentally relevant problems Addresses problems and case studies in one volume
Book Synopsis Applications of Biochar for Environmental Safety by : Ahmed Abdelhafez
Download or read book Applications of Biochar for Environmental Safety written by Ahmed Abdelhafez and published by BoD – Books on Demand. This book was released on 2020-07-22 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biochar is a carbon-rich material produced from the pyrolysis of organic materials from agricultural and forestry biomass at a relatively low temperature in the absence of oxygen. As such, it has potential for solving many agricultural and environmental problems.This book is divided into five sections: “Introduction,” “Production and Legislation of Biochar,” “Applications of Biochar for Soil Fertility Improvement,” “Role of Biochar for Soil Remediation and Ameliorating Salinity Effects” and “Applications of Biochar for Water Treatment.” Chapters address topics such as the pros and cons of biochar, its production, and its role in remediating and treating contaminated soils and water.
Book Synopsis Diffusion in Natural Porous Media by : Peter Grathwohl
Download or read book Diffusion in Natural Porous Media written by Peter Grathwohl and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diffusion in Natural Porous Media: Contaminant Transport, Sorption/Desorption and Dissolution Kinetics introduces the general principles of diffusion in the subsurface environment and discusses the implications for the fate and transport of contaminants in soils and groundwater. Emphasis is placed on sorption/desorption and the dissolution kinetics of organic contaminants, both of which are limited by the slow speed of molecular diffusion. Diffusion in Natural Porous Media: Contaminant Transport, Sorption/Desorption and Dissolution Kinetics compiles methods for calculating the diffusion coefficients of organic compounds (in aqueous solution or vapor phase) in natural porous media. The author uses analytical solutions of Fick's 2nd law and some simple numerical models to model diffusive transport under various initial and boundary conditions. A number of these models may be solved using spreadsheets. The book examines sorption/desorption rates of organic compounds in various soils and aquifer materials, and also examines the dissolution kinetics of nonaqueous phase liquids in aquifers, in both the trapped residual phase and in pools. Diffusion in Natural Porous Media: Contaminant Transport, Sorption/Desorption and Dissolution Kinetics concludes with a discussion of the impact of slow diffusion processes on soil and groundwater decontamination and the implications of these processes for groundwater risk assessment.
