Book contents
- Frontmatter
- Dedication
- Contents
- Preface
- Preface to Second Edition
- Preface to First Edition
- A Note About Software
- 1 Introduction
- 2 Modeling Overview
- PART I EQUILIBRIUM IN NATURAL WATERS
- 3 The Equilibrium State
- 4 Solving for the Equilibrium State
- 5 Changing the Basis
- 6 Equilibrium Models of NaturalWaters
- 7 Redox Disequilibrium
- 8 Activity Coefficients
- 9 Sorption and Ion Exchange
- 10 Surface Complexation
- 11 Three-Layer Complexation
- 12 Automatic Reaction Balancing
- 13 Uniqueness
- PART II REACTION PROCESSES
- PART III APPLIED REACTION MODELING
- Appendix A Sources of Modeling Software
- Appendix B Evaluating the HMW Activity Model
- Appendix C Minerals in the LLNL Database
- Appendix D Nonlinear Rate Laws
- References
- Index
7 - Redox Disequilibrium
from PART I - EQUILIBRIUM IN NATURAL WATERS
Published online by Cambridge University Press: 09 December 2021
Book contents
- Frontmatter
- Dedication
- Contents
- Preface
- Preface to Second Edition
- Preface to First Edition
- A Note About Software
- 1 Introduction
- 2 Modeling Overview
- PART I EQUILIBRIUM IN NATURAL WATERS
- 3 The Equilibrium State
- 4 Solving for the Equilibrium State
- 5 Changing the Basis
- 6 Equilibrium Models of NaturalWaters
- 7 Redox Disequilibrium
- 8 Activity Coefficients
- 9 Sorption and Ion Exchange
- 10 Surface Complexation
- 11 Three-Layer Complexation
- 12 Automatic Reaction Balancing
- 13 Uniqueness
- PART II REACTION PROCESSES
- PART III APPLIED REACTION MODELING
- Appendix A Sources of Modeling Software
- Appendix B Evaluating the HMW Activity Model
- Appendix C Minerals in the LLNL Database
- Appendix D Nonlinear Rate Laws
- References
- Index
Summary
Natural waters close to Earth's surface almost invariably exist in states of redox equilibrium. Each half-cell reaction in a water is represented by a specific redox potential, measured in volts. Energy is released when electrons pass from an electron donating reaction to an accepting reaction at greater redox potential. The released energy is the basis of chemolithotrophic life.
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- Geochemical and Biogeochemical Reaction Modeling , pp. 87 - 96Publisher: Cambridge University PressPrint publication year: 2022