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Front Cover

Adsorption of Metals by Geomedia

Copyright Page

Contents

Contributors

Preface

Chapter 1. Adsorption of Metals by Geomedia: Data Analysis, Modeling, Controlling Factors, and Related Issues

I. Introduction

II. Data Treatment and Presentation

III. Adsorption Models

IV. Artifact Effects

V. Variables

VI. Conclusions

References

Chapter 2. Uranium vI Adsorption on Model Minerals: Controlling Factors and Surface Complexation Modeling

I. Introduction

II. Aqueous Speciation and Sorption Modeling

III. Experimental

IV. Uranium Sorption on Model Minerals in NaNO3/CO2 Systems

V. Effect of Trace Impurities on Uranium Sorption by Kaolinite

VI. Effect of Complexing Ligands

VII. Summary

References

Chapter 3. Uranium VI Sorption onto Selected Mineral Surfaces: Key Geochemical Parameters

I. Introduction

II. Experimental Procedure

III. Experimental Results and Discussion

IV. Surface Complexation Model

V. Conclusions

References

Chapter 4. Studies of Neptunium V Sorption on Quartz, Clinoptilolite, Montmorillonite, and a-Alumina

I. Introduction

II. Experimental Procedure

III. Results and Discussion

IV. Conclusions

References

Chapter 5. Factors Affecting Trivalent f-element Adsorption to an Acidic Sandy Soil

I. Introduction

II. Materials and Methods

III. Results and Discussion

IV. Conclusions

References

Chapter 6. Lead Sorption, Chemically Enhanced Desorption, and Equilibrium Modeling in an Iron-Oxide-Coated Sand and Synthetic Groundwater System

I. Introduction

II. Materials and Methods

III. Results and Discussion

VI. Conclusion

References

Chapter 7. Uranium Sorption onto Natural Sands as a Function of Sediment Characteristics and Solution pH

I. Introduction

II. Experimental

III. Results and Discussion

IV. Conclusions

References

Chapter 8. Intraparticle Diffusion of Metal Contaminants in Amorphous Oxide Minerals

I. Introduction

II. Diffusion Processes

III. Conclusions

References

Chapter 9. Copper Sorption Kinetics and Sorption Hysteresis in Two Oxide-Rich Soils (Oxisols): Effect of Phosphate Pretreatment

I. Introduction

II. Materials and Methods

III. Results

IV. Discussion

References

Chapter 10. Influence of pH, Metal Concentration, and Soil Component Removal on Retention of Pb and Cu by an lUitic Soil

I. Introduction

II. Materials and Methods

III. Results and Discussions

IV. Concluding Remarks

References

Chapter 11. Immobilization of Pb by Hydroxylapatite

I. Introduction

II. Materials and Methods

III. Results and Discussion

IV. Conclusion

References

Chapter 12. Effect of Solid: Liquid Ratio on the Sorption of Sr2+ and Cs+ on Bentonite

I. Introduction

II. Materials and Methods

III. Results and Discussion

IV. Summary and Conclusions

References

Chapter 13. Adsorption of UVI and Citric Acid on Goethite, Gibbsite, and Kaolinite: Comparing Results for Binary and Ternary Systems

I. Background

II. Experimental Setup

III. Results and Discussion

IV. Conclusions

References

Chapter 14. Surface and Solution Speciation of Ag I in a Heterogeneous Ferrihydrite-Solution System with Thiosulfate

I. Environmental Chemistry and the Fate of Silver

II. Silver and Silver-Ligand Complex Sorption to Minerals

III. Application of the Triple-Layer Surface Complexation Model

IV. Detailing Pathways using Spectroscopy

References

Chapter 15. Extended X-Ray Absorption Fine Structure (EXAFS) Analysis of Aqueous Sr II Ion Sorption at Clay–Water Interfaces

I. Introduction

II. Experimental

III. Results and Discussion

IV. Conclusions

References

Chapter 16. Structure and Composition of UraniumvI Sorption Complexes at the Kaolinite-Water Interface

I. Introduction

II. Background

III. Experimental

IV. Results

V. Discussion

VI. Conclusions

References

Chapter 17. Surface Charge and Metal Sorption to Kaolinite

I. Introduction

II. Experimental Methods

III. Kaolinite Surface Charge

IV. Metal Sorption

V. Conclusions

References

Chapter 18. Molecular Models of Cesium Sorption on Kaolinite

I. Introduction

II. Kaolinite Structure and Surface Hydrolysis

III. Theoretical Basis for Computer Simulations

IV. Results and Discussion

V. Conclusions

References

Chapter 19. Sorption of Molybdenum on Oxides, Clay Minerals, and Soils: Mechanisms and Models

I. Introduction

II. Materials and Methods

III. Results and Discussion

IV. Summary

V. References

Chapter 20. Nonequilibrium and Nonlinear Sorption during Transport of Cadmium, Nickel, and Strontium through Subsurface Soils

I. Introduction

II. Materials and Methods

III. Results and Discussion

IV. Conclusions

References

Chapter 21. Fluorescence Quenching and Aluminum Adsorption to Organic Substances

I. Introduction

II. Equations to Interpret Fluorescence Measurements

III. Experimental Method

IV. Results

V. Conclusions

References

Chapter 22. Modeling of Competitive Ion Binding to Heterogeneous Materials with Affinity Distributions

I. Introduction

II. Variable Concentration for a Single Component

III. Variable Concentrations for Two Components

IV. Discussion

References

Chapter 23. Ion Binding to Humic Substances: Measurements, Models, and Mechanisms

I. Introduction

II. Basic Charging Behavior of Humic Substances

III. Heterogeneity Analysis

IV. pH-Dependent Metal Ion Binding

V. Conclusions

References

Chapter 24. Predictive Double-Layer Modeling of Metal Sorption in Mine-Drainage Systems

I. Introduction

II. Sorption Experiments and Modeling with Natural Materials

III. Sorption Modeling at Diverse Mine-Drainage Sites

IV. Predictive Sorption Modeling for Mitigation and Remediation

V. Conclusions

References

Epilogue: Priorities for Future Metal Adsorption Research

I. Integration and Synthesis of Existing Data

II. System Characterization

III. Principal Adsorbents

IV. Multimetal Data on Individual Adsorbents

V. Loading

VI. Surface Area, Site Density, and Metal Adsorption Density

VII. Time Dependency

VIII. Additivity of Multiple Adsorbents

IX. Solids Concentration Effect

X. Nature of Surface Complexes and Mechanistic Modeling

XI. Field-Scale Applications

XII. Summary

References

Appendix

Index