Surface Complexation Modeling: Gibbsite

PREFACE.

CHAPTER 1 - Aluminum Oxides and Hydroxides under Environmental Conditions.

1. INTRODUCTION.

1.1 Occurrence of Aluminum Oxides and Hydroxides in the Subsurface.

1.2 Occurrence of Aluminum Oxides and Hydroxides in Surface Water.

1.3 Use of Aluminum Hydroxide in Water Treatment.

1.4 Summary.

CHAPTER - Formation and Properties of Gibbsite and closely-related minerals.

2. Formation and properties of Gibbsite and closely-related minerals.

2.1 Al Polymerization Models.

2.2 Formation of Gibbsite and Other Al-Hydroxides and Oxyhydroxides.

2.3 Aluminum Hydroxide Polymorphs: Structure and Nomenclature.

2.4 Gibbsite.

2.5 Bayerite.

2.6 Nordstrandite.

2.7 Doyleite.

2.8 Other forms of aluminum oxides and oxyhydroxides.

2.9 Other forms that manufactured under high temperature and pressure.

CHAPTER 3 - Types of Available Data.

3.1 Gibbsite Structure Verification.

3.2 Physical-Chemical Properties.

3.3 Acid-Base Titration Data.

3.4 Cation and Anion Sorption Data.

3.5 Spectroscopic Data for Sorption on Gibbsite.

3.6 Proton Release/Uptake Data.

3.7 Electrokinetic Data.

3.8 Summary.

CHAPTER 4 - Data Compilation and Treatment Methods.

4.1 Collection of data.

4.2 Assessment of Data Quality.

4.3 Compilation of Surface Properties.

4.4 Extraction of Equilibrium Sorption Constants.

4.5 Optimal Fit Simulations.

4.6 Presentation of Results.

CHAPTER 5 - Surface Properties of Gibbsite.

5.1 Surface Area.

5.2 Site Density.

5.3 Point of Zero Charge.

5.4 Surface Acid-Base Chemistry.

5.5 Effects of Dissolution on Gibbsite Surface Acid-Base Chemistry.

5.6 Summary.

CHAPTER 6 - Cation Sorption on Gibbsite.

6.1 Modeling Methodology and Reactions.

6.2 Available Spectroscopic Data and Use in Modeling.

6.3 Copper.

6.4 Lead.

6.5 Cobalt.

6.6 Cadmium.

6.7 Manganese.

6.8 Iron.

6.9 Calcium.

6.10 Zinc.

6.11 Mercury.

6.12 Uranium.

6.13 Thorium.

CHAPTER 7 - Anion Sorption on Gibbsite.

7.1 Modeling Methodology and Reactions.

7.2 Available Spectroscopic Data and Use in Modeling.

7.3 Phosphate.

7.4 Arsenate.

7.5 Arsenite.

7.6 Molybdate.

7.7 Selenate.

7.8 Chromate.

7.9 Borate.

7.10 Sulfate.

7.11 Fluoride.

7.12 Silicate.

CHAPTER 8 - Coherence and Extrapolation of Results.

8.1 Cation Sorption on Gibbsite.

8.2 Anion Sorption on Gibbsite.

8.3 Comparison of Gibbsite surface complexation constants with those of Goethite, Hydrous Ferric Oxide and Hydrous Manganese Oxide.

8.4 Summary.

REFERENCES.

APPENDIX A. Summary of Experimental Details.