This book updates a successful and widely-used text that is "the most authoritative source in the field of environmental chemodynamics." Its main focus is on the mechanisms and rates of movement of chemicals across the air/soil, soil/water, and water/air interfaces, and on how natural processes work to mobilize chemicals near and across interfaces--information vital to performing human and ecological risk assessments. The book opens with a logical introduction of the subject and goes on to describe the applications. Included are many examples and problems that illustrate the topics. This new edition will now include more examples, exercises, and case histories. In addition, chapters on the important mechanisms of soil/plant systems and aquatic organisms have been added, as well as coverage of industrial emissions and inorganic chemicals.