Modeling Desorption Kinetics in Soils Columns PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Modeling Desorption Kinetics in Soils Columns PDF full book. Access full book title Modeling Desorption Kinetics in Soils Columns by Irfan Aslam. Download full books in PDF and EPUB format.
Author: Irfan Aslam
Publisher:
ISBN:
Category : Soil absorption and adsorption
Languages : en
Pages : 378
Get Book Here
Book Description
Author: Irfan Aslam
Publisher:
ISBN:
Category : Soil absorption and adsorption
Languages : en
Pages : 378
Get Book Here
Book Description
Author: Zhenqing Shi
Publisher:
ISBN: 9780542519369
Category : Chemical kinetics
Languages : en
Pages :
Get Book Here
Book Description
Understanding the kinetics of trace metals sorption and desorption on soils is important for better prediction of metal behavior in the environment. In this dissertation, the effect of solution chemistry and soil composition on trace metal sorption and desorption kinetics was investigated. Based on the experimental results, predictive kinetics models were formulated and successfully used to describe the kinetics of trace metals sorption and desorption on a variety of soils. The kinetics experiments were conducted with a stirred-flow method. A number of soil samples, which cover a wide range of soil properties from USA and European countries, were selected to test the effect of soil composition. The effects of solution chemistry, pH, metal loadings, and dissolved organic matter (DOM) concentration, were also systematically examined. Most of kinetics experiments were run with two trace metals, copper and zinc, which demonstrated very different kinetics behaviors. The solution pH has significant effect on the Cu and Zn sorption and desorption kinetics which can be accounted by the proton competition. DOM greatly enhanced Cu release but had little effect on Zn, attributed to formation of strong Cu-DOM complex decreasing the Cu ion re-adsorption on soils. Among all soil components, soil organic matter (SOM) is the dominant phase controlling Cu and Zn sorption and desorption kinetics. The effect of residence time was also tested. The kinetics models were formulated and successfully used to describe the Cu and Zn sorption and desorption kinetics under different solution chemistry and soil compositions. The models are based on the mass balance of the flow system and incorporate the chemical reactions between metals and soils. For Zn, a two-site kinetics model, including one fast and one slow site, was necessary. The soil organic carbon (SOC) is the major model parameter accounting for the effect of soil properties on Zn sorption and desorption kinetics. The organic carbon normalized sorption rate coefficients can be applied to different soils based on their SOC concentrations. One set of rate coefficients can be applied to different influent Zn concentrations, which corresponds to the linear portion of the Zn sorption isotherm. The sorption rate coefficients were dependent on solution pH which was accounted for by Zn and proton competition. The same model parameters can be applied to different flow rates. (Abstract shortened by UMI.).
Author: Rolf Nieder
Publisher: CRC Press
ISBN: 9781560229155
Category : Technology & Engineering
Languages : en
Pages : 800
Get Book Here
Book Description
Learn to create and use simulation models—the most reliable and cost-effective tools for predicting real-world results! The Handbook of Processes and Modeling in the Soil-Plant System is the first book to present a holistic view of the processes within the soil-plant-atmosphere continuum. Unlike other publications, which tend to be more specialized, this book covers nearly all of the processes in the soil-plant system, including the fundamental processes of soil formation, degradation, and the dynamics of water and matter. It also illustrates how simulation modeling can be used to understand and forecast multiple interactions among various processes and predict their environmental impact. This unique volume assembles information that until now was scattered among journals, bulletins, reports, and symposia proceedings to present models that simulate almost all of the processes occurring in the soil-plant system and explores the results that these models are capable of producing. With chapters authored by experts with years of research and teaching experience, the Handbook of Processes and Modeling in the Soil-Plant System examines: physical, chemical, and biological soil processes the soil formation and weathering process and its modeling the impact of radioactive fallout on the soil-plant system soil degradation processes and ways to control them water and matter dynamics in the soil-plant system growth and development of crops at various levels of production the potentials and limitations of using simulation models Students, educators, and professionals alike will find the Handbook of Processes and Modeling in the Soil-Plant System an invaluable reference on the soil-plant-atmosphere system and an ideal tool to help develop an effective decision support system.
Author: H. Magdi Selim
Publisher: CRC Press
ISBN: 9781420032611
Category : Technology & Engineering
Languages : en
Pages : 266
Get Book Here
Book Description
Understanding the mechanisms associated with metal complexes and the sequestering metal contaminants in the environment is essential for effective remediation. Heavy Metal Release in Soils describes and quantifies desorption/release kinetics and dissolution reactions in the release of heavy metals from soil. The book focuses on: New techniques - microscopic surface techniques, NMR and electrophoresis, XAFS, SFM, and time-resolved ATR-FTIR Theoretical analysis and kinetic approaches - adsorption/desorption hysteresis, competitive sorption and transport, multi-component models, speciation kinetics, isotherms and soil and metal parameters, and the role of soil properties on transport Applications - arsenic speciation and mobility in contaminated soils, modeling activity of CD, Zn, and Cu in contaminated soils, and in situ chemical immobilization A timely addition to the literature, this book highlights the desorption/release mechanisms for the purpose of resolving remediation dilemmas in contaminated environments. It gives you the added advantage of case studies at both the microscopic and macroscopic scales, and provides both experimental and numerical investigations. With contributions from an international panel of authors, Heavy Metals Release in Soils fills a gap in the current literature concerned with subsurface contaminant fate and transport processes.
Author: Ian A. Kennedy
Publisher:
ISBN:
Category :
Languages : en
Pages : 292
Get Book Here
Book Description
Author: H. Magdi Selim
Publisher: CRC Press
ISBN: 146655794X
Category : Science
Languages : en
Pages : 356
Get Book Here
Book Description
During the last four decades, tremendous advances have been made towards the understanding of transport characteristics of contaminants in soils, solutes, and tracers in geological media. Transport & Fate of Chemicals in Soils: Principles & Applications offers a comprehensive treatment of the subject complete with supporting examples of mathematical models that describe contaminants reactivity and transport in soils and aquifers. This approach makes it a practical guide for designing experiments and collecting data that focus on characterizing retention as well as release kinetic reactions in soils and contaminant transport experiments in the laboratory, greenhouse), and in the field. The book provides the basic framework of the principals governing the sorption and transport of chemicalsin soils. It focuses on physical processes such as fractured media, multiregion, multiple porosities, and heterogeneity and effect of scale as well as chemical processes such as nonlinear kinetics, release and desorption hysteresis, multisite and multireaction reactions, and competitive-type reactions. The coverage also includes details of sorption behavior of chemicals with soil matrix surfaces as well the integration of sorption characteristics with mechanisms that govern solute transport in soils. The discussions of applications of the principles of sorption and transport are not restricted to contaminants, but also include nitrogen, phosphorus, and trace elements including essential micronutrients, heavy metals, military explosives, pesticides, and radionuclides. Written in a very clear and easy-to-follow language by a pioneer in soil science, this book details the basic framework of the physical and chemical processes governing the transport of contaminants, trace elements, and heavy metals in soils. Highly practical, it includes laboratory methods, examples, and empirical formulations. The approach taken by the author gives you not only the fundamentals of understanding of reactive chemicals retention and their transport in soils and aquifers, but practical guidance you can put to immediate use in designing experiments and collecting data.
Author: Donald L. Sparks
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 328
Get Book Here
Book Description
Kinetics of soil chemical reactions. Methods of obtaining and analyzin kinetic data. Relaxation methods for studying kinetics of soil chemical phenomena. Kinetics of ion sorptionon humic substances. Kinetics of sorption/desorption processes in soils. Modelling nonequilibrium reactions of inorganic solutes in soil columns. Sorption kinetics of organic chemicals: methods, models, and mechanisms.
Author: Carol Ruth Johnson
Publisher:
ISBN:
Category :
Languages : en
Pages : 480
Get Book Here
Book Description
Author: Beth E. Leinberry
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 258
Get Book Here
Book Description
Author:
Publisher: Academic Press
ISBN: 0080563716
Category : Technology & Engineering
Languages : en
Pages : 361
Get Book Here
Book Description
Volume 58 contains seven reviews covering key contemporary topics on crop and soil sciences. Three of these reviews focus upon soils; in particular, biodegradation of soil pollutants, modelling of solute transport in soils, and the analysis of soil salinity. The other four papers deal especially with crops: herbicide resistance, silicon and rice production, the use of tissue cultures for crop improvement, and crop water relations. With this latest volume, Advances in Agronomy continues to be recognized as a leading reference and as a first-rate source of the latest research in agronomy, crop science, and soil science. - Biodegradation of soil pollutants - Herbicide resistance - Silicon management - Modeling solute transport in soils - Tissue cultures and crop improvement - Soil salinity - Crop/water relations
