An indispensable primer and reference textbook, the third edition of Geochemical and Biogeochemical Reaction Modeling carries the reader from the field's origins and theoretical underpinnings through to a collection of fully worked examples. A clear exposition of the underlying equations and calculation techniques is balanced by real-world example calculations. The book depicts geochemical reaction modeling as a vibrant field of study applicable to a wide spectrum of issues of scientific, practical, and societal concern. The new edition offers a thorough description of surface complexation modeling, including two- and three-layer methods; broader treatment of kinetic rate laws; the effect of stagnant zones on transport; and techniques for determining gas partial pressures. This handbook demystifies and makes broadly accessible an elegant technique for portraying chemical processes in the geosphere. It will again prove to be invaluable for geochemists, environmental scientists and engineers, aqueous and surface chemists, microbiologists, university teachers, and government regulators.

Geochemical reaction modeling plays an increasingly vital role in several areas of geoscience ranging from groundwater and surface water hydrology to environmental preservation and remediation to economic and petroleum geology. This book provides an up-to-date overview and a large number of fully worked examples of the use of numerical methods to model reaction processes in the Earth's crust and on its surface. Special attention is given to integrating surface complexation, kinetic rate laws, and isotope fractionation into quantitative process models. Earth science professionals and students in a variety of specialties will benefit from the wealth of information and practical advice this book has to offer.