Author: Mohammad Reza Sabour
Publisher:
ISBN:
Category : Clay soils
Languages : en
Pages : 0
Book Description
The fate of contaminant migration through the subsurface environment as well as their potential hazard to humans, animals, and aquatic life has become one of the major current concerns of the scientific community. Accordingly, various theoretical and experimental studies have been conducted on the saturated soil by many researchers. The literature review emphasizes that the problem of the unsaturated transport of contaminants through porous media has received little attention. Thus, the present work is carried out to contribute to the study of heavy metals migration within unsaturated clay soil through mathematical modeling of the mechanisms and parameters which influence the transport phenomenon. For successful modeling, it is imperative that parameters which affect the transport phenomenon be investigated and determined properly. Hence, the study was conducted through two principal parts. The first part is an experimental investigation to quantify the various soil-water (solution) interactions that have an effect on the flow and contaminant transport and to derive the constitutive relationships required in mathematical modeling. The second part develops a contaminant migration mathematical model which includes unsaturated flow, hydrodynamic dispersion, and physico-chemical reaction between the solid and the liquid phase, employing the theory of mass transport. The experimental investigation contains two main sets of laboratory tests: (i) some independent tests in order to isolate and better understand the individual processes, and (ii) some tests on experimental models of the real phenomena to verify the related parameters in a combined kinetic situation. The results of all experiments are followed by discussion, in order to better understand the phenomenon behavior, and to realize the relationships among the various processes. Based on the above mechanisms, the governing equations of the problem are derived to provide a quantitative account of the behavior of the phenomenon. Finally, a finite volume algorithm is developed, on the basis of the mathematical model, in order to solve the contaminant transport equations numerically. Using experimental results, the numerical model is then calibrated and verified. The developed computer code provides the ability to predict the contaminant migration for any depth and period of time. Based on this capability the concentration variations of the solution along the soil profile, especially for long time periods, are predicted and illustrated.
Inorganic Contaminant Transport Through Unsaturated Clay Soil
Author: Mohammad Reza Sabour
Publisher:
ISBN:
Category : Clay soils
Languages : en
Pages : 0
Book Description
The fate of contaminant migration through the subsurface environment as well as their potential hazard to humans, animals, and aquatic life has become one of the major current concerns of the scientific community. Accordingly, various theoretical and experimental studies have been conducted on the saturated soil by many researchers. The literature review emphasizes that the problem of the unsaturated transport of contaminants through porous media has received little attention. Thus, the present work is carried out to contribute to the study of heavy metals migration within unsaturated clay soil through mathematical modeling of the mechanisms and parameters which influence the transport phenomenon. For successful modeling, it is imperative that parameters which affect the transport phenomenon be investigated and determined properly. Hence, the study was conducted through two principal parts. The first part is an experimental investigation to quantify the various soil-water (solution) interactions that have an effect on the flow and contaminant transport and to derive the constitutive relationships required in mathematical modeling. The second part develops a contaminant migration mathematical model which includes unsaturated flow, hydrodynamic dispersion, and physico-chemical reaction between the solid and the liquid phase, employing the theory of mass transport. The experimental investigation contains two main sets of laboratory tests: (i) some independent tests in order to isolate and better understand the individual processes, and (ii) some tests on experimental models of the real phenomena to verify the related parameters in a combined kinetic situation. The results of all experiments are followed by discussion, in order to better understand the phenomenon behavior, and to realize the relationships among the various processes. Based on the above mechanisms, the governing equations of the problem are derived to provide a quantitative account of the behavior of the phenomenon. Finally, a finite volume algorithm is developed, on the basis of the mathematical model, in order to solve the contaminant transport equations numerically. Using experimental results, the numerical model is then calibrated and verified. The developed computer code provides the ability to predict the contaminant migration for any depth and period of time. Based on this capability the concentration variations of the solution along the soil profile, especially for long time periods, are predicted and illustrated.
Publisher:
ISBN:
Category : Clay soils
Languages : en
Pages : 0
Book Description
The fate of contaminant migration through the subsurface environment as well as their potential hazard to humans, animals, and aquatic life has become one of the major current concerns of the scientific community. Accordingly, various theoretical and experimental studies have been conducted on the saturated soil by many researchers. The literature review emphasizes that the problem of the unsaturated transport of contaminants through porous media has received little attention. Thus, the present work is carried out to contribute to the study of heavy metals migration within unsaturated clay soil through mathematical modeling of the mechanisms and parameters which influence the transport phenomenon. For successful modeling, it is imperative that parameters which affect the transport phenomenon be investigated and determined properly. Hence, the study was conducted through two principal parts. The first part is an experimental investigation to quantify the various soil-water (solution) interactions that have an effect on the flow and contaminant transport and to derive the constitutive relationships required in mathematical modeling. The second part develops a contaminant migration mathematical model which includes unsaturated flow, hydrodynamic dispersion, and physico-chemical reaction between the solid and the liquid phase, employing the theory of mass transport. The experimental investigation contains two main sets of laboratory tests: (i) some independent tests in order to isolate and better understand the individual processes, and (ii) some tests on experimental models of the real phenomena to verify the related parameters in a combined kinetic situation. The results of all experiments are followed by discussion, in order to better understand the phenomenon behavior, and to realize the relationships among the various processes. Based on the above mechanisms, the governing equations of the problem are derived to provide a quantitative account of the behavior of the phenomenon. Finally, a finite volume algorithm is developed, on the basis of the mathematical model, in order to solve the contaminant transport equations numerically. Using experimental results, the numerical model is then calibrated and verified. The developed computer code provides the ability to predict the contaminant migration for any depth and period of time. Based on this capability the concentration variations of the solution along the soil profile, especially for long time periods, are predicted and illustrated.
Principles of Contaminant Transport in Soils
Author: Raymond Nen Yong
Publisher: Elsevier Science & Technology
ISBN:
Category : Science
Languages : en
Pages : 352
Book Description
Waste generation and disposal; Soil composition; Wastes and contaminants; Soil-water interaction and relations; Contaminant-soil interaction; Soil permeability: characteristics and laboratory measurements; Evaluation of adsorption and diffusion; Contaminant transport modelling: solute transport; Contaminant transport modelling: transport of non-aqueous phase liquids.
Publisher: Elsevier Science & Technology
ISBN:
Category : Science
Languages : en
Pages : 352
Book Description
Waste generation and disposal; Soil composition; Wastes and contaminants; Soil-water interaction and relations; Contaminant-soil interaction; Soil permeability: characteristics and laboratory measurements; Evaluation of adsorption and diffusion; Contaminant transport modelling: solute transport; Contaminant transport modelling: transport of non-aqueous phase liquids.
Colloidal-facilitated Transport of Inorganic Contaminants in Ground Water
Author: Robert William Puls
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 16
Book Description
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 16
Book Description
Bioavailability of Contaminants in Soils and Sediments
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309086256
Category : Technology & Engineering
Languages : en
Pages : 433
Book Description
Bioavailability refers to the extent to which humans and ecological receptors are exposed to contaminants in soil or sediment. The concept of bioavailability has recently piqued the interest of the hazardous waste industry as an important consideration in deciding how much waste to clean up. The rationale is that if contaminants in soil and sediment are not bioavailable, then more contaminant mass can be left in place without creating additional risk. A new NRC report notes that the potential for the consideration of bioavailability to influence decision-making is greatest where certain chemical, environmental, and regulatory factors align. The current use of bioavailability in risk assessment and hazardous waste cleanup regulations is demystified, and acceptable tools and models for bioavailability assessment are discussed and ranked according to seven criteria. Finally, the intimate link between bioavailability and bioremediation is explored. The report concludes with suggestions for moving bioavailability forward in the regulatory arena for both soil and sediment cleanup.
Publisher: National Academies Press
ISBN: 0309086256
Category : Technology & Engineering
Languages : en
Pages : 433
Book Description
Bioavailability refers to the extent to which humans and ecological receptors are exposed to contaminants in soil or sediment. The concept of bioavailability has recently piqued the interest of the hazardous waste industry as an important consideration in deciding how much waste to clean up. The rationale is that if contaminants in soil and sediment are not bioavailable, then more contaminant mass can be left in place without creating additional risk. A new NRC report notes that the potential for the consideration of bioavailability to influence decision-making is greatest where certain chemical, environmental, and regulatory factors align. The current use of bioavailability in risk assessment and hazardous waste cleanup regulations is demystified, and acceptable tools and models for bioavailability assessment are discussed and ranked according to seven criteria. Finally, the intimate link between bioavailability and bioremediation is explored. The report concludes with suggestions for moving bioavailability forward in the regulatory arena for both soil and sediment cleanup.
Physical Nonequilibrium in Soils
Author: H. Magdi Selim
Publisher: CRC Press
ISBN: 1000115178
Category : Science
Languages : en
Pages : 500
Book Description
Physical Nonequilibrium in Soils provides cutting-edge knowledge on physical nonequilibrium phenomena in soils, offering unique insight into the complexity of our physical world. With 18 chapters comprising the book, topics cover soil properties fluid properties mechanistic models transfer function geostatistics fractal analysis cellular-automation fluids coupling of physical and chemical nonequilibrium models confirming and quantifying physical nonequilibrium in soils analytical solutions field-scale research environmental impacts.
Publisher: CRC Press
ISBN: 1000115178
Category : Science
Languages : en
Pages : 500
Book Description
Physical Nonequilibrium in Soils provides cutting-edge knowledge on physical nonequilibrium phenomena in soils, offering unique insight into the complexity of our physical world. With 18 chapters comprising the book, topics cover soil properties fluid properties mechanistic models transfer function geostatistics fractal analysis cellular-automation fluids coupling of physical and chemical nonequilibrium models confirming and quantifying physical nonequilibrium in soils analytical solutions field-scale research environmental impacts.
Contaminant Geochemistry
Author: Brian Berkowitz
Publisher: Springer Science & Business Media
ISBN: 3540743820
Category : Science
Languages : en
Pages : 413
Book Description
Combining earth science, subsurface hydrology and environmental geochemistry, this book provides a comprehensive background for those interested in the protection and sustainable management of the subsurface environment. The reader is introduced to the chemistry of contaminants, which usually disturb the natural equilibrium in the subsurface as a result of human activity. One focus of the book is on contaminant reactions in soil solutions. Discussions on case studies are provided.
Publisher: Springer Science & Business Media
ISBN: 3540743820
Category : Science
Languages : en
Pages : 413
Book Description
Combining earth science, subsurface hydrology and environmental geochemistry, this book provides a comprehensive background for those interested in the protection and sustainable management of the subsurface environment. The reader is introduced to the chemistry of contaminants, which usually disturb the natural equilibrium in the subsurface as a result of human activity. One focus of the book is on contaminant reactions in soil solutions. Discussions on case studies are provided.
Facilitated Transport of Inorganic Contaminants in Ground Water
Permeability and Groundwater Contaminant Transport
Author: T. F. Zimmie
Publisher: ASTM International
ISBN: 9780803107977
Category : Science
Languages : en
Pages : 272
Book Description
Publisher: ASTM International
ISBN: 9780803107977
Category : Science
Languages : en
Pages : 272
Book Description
Unsaturated Soils for Asia
Author: H. Raharjdo
Publisher: CRC Press
ISBN: 1000151042
Category : Technology & Engineering
Languages : en
Pages : 878
Book Description
This is a collection of articles from the Asian conference UNSAT-ASIA 2000, covering topics such as: historical developments; numerical modelling; suction measurement techniques; permeability and flow; mass transport; and engineering applications.
Publisher: CRC Press
ISBN: 1000151042
Category : Technology & Engineering
Languages : en
Pages : 878
Book Description
This is a collection of articles from the Asian conference UNSAT-ASIA 2000, covering topics such as: historical developments; numerical modelling; suction measurement techniques; permeability and flow; mass transport; and engineering applications.
Monitored Natural Attenuation of Inorganic Contaminants in Ground Water
Author:
Publisher:
ISBN:
Category : Arsenic
Languages : en
Pages : 124
Book Description
V.3 ... consists of individual chapters that describe 1) the conceptual background for radionuclides, including tritium, radon, strontium, technetium, uranium, iodine, radium, thorium, cesium, plutonium-americium and 2) data requirements to be met during site characterization.
Publisher:
ISBN:
Category : Arsenic
Languages : en
Pages : 124
Book Description
V.3 ... consists of individual chapters that describe 1) the conceptual background for radionuclides, including tritium, radon, strontium, technetium, uranium, iodine, radium, thorium, cesium, plutonium-americium and 2) data requirements to be met during site characterization.