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Geochemical Equilibrium Modeling in Soils and Sediments

  • Book

  • March 2026
  • Elsevier Science and Technology
  • ID: 6250665

Geochemical Equilibrium Modeling in Soils and Sediments provides a systematic examination of the application of thermodynamic principles to chemical reactions of elements in soils. Classical thermodynamic concepts are introduced, providing a theoretical foundation. Equilibrium reactions are then discussed element-by-element in order of decreasing average abundance in the solid phase of soils and sediments. Solid phase transitions, dissolution, volatilization, and aqueous speciation are investigated in detail, with each chapter giving readers greater depth of understanding of these complex systems.

The book represents a modernization of the approach to geochemical modeling, updating thermodynamic data and focusing on reactions that are known to occur at the solid-solution interface in soil and sediment environments. Readers are shown how these developments are integrated into geochemical modeling and how to interpret geochemical modeling results. The tools in this book will further allow readers to understand the interactions among elements, predict solubility as the physical environment changes, and give them the means to anticipate chemical and biological lability in response to perturbations.

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Table of Contents

1. Introduction
2. Theoretical development of chemical equilibrium concepts
3. Geochemical models and modeling
4. Aluminum
5. Silica
6. Aluminosilicate minerals
7. Carbon dioxide and carbonate equilibria
8. Calcium
9. Magnesium
10. Sodium and Potassium
11. Iron
12. Manganese
13. Phosphate
14. Zinc
15. Copper
16. Nitrogen
17. Sulfur
18. Lead
19. Cadmium
20. Arsenic
21. Strontium
22. Plutonium
23. Natural Organic ligands
24. Chelate equilibria

Authors

Arthur Paul Schwab Texas A&M University, TX, USA. Paul Schwab is a soil physical chemist with 40 years of experience in research and teaching. His career has focused on the environmental applications of soil chemistry to a broad spectrum of issues including heavy metals, contaminant organics, fertilizers, and pesticides in soils and sediments. He has over 130 total peer-reviewed publications, 13,000 citations of his work, authored/edited two books, and received numerous awards for research. He taught soil chemistry for more than 35 years. The application of chemical equilibrium has been key to his studies, playing a role in his work starting with his graduate career (1976) through the present day.