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Analysis of Time‐dependent Chemical Processes in Soils
Author(s) -
Skopp J.
Publication year - 1986
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1986.00472425001500030001x
Subject(s) - variety (cybernetics) , terminology , biochemical engineering , non equilibrium thermodynamics , process (computing) , chemical reaction , soil water , statistical physics , chemistry , kinetics , biological system , thermodynamics , computer science , environmental science , mathematics , soil science , physics , statistics , engineering , organic chemistry , philosophy , linguistics , biology , operating system , quantum mechanics
Analysis of time‐dependent processes in soils has been the subject of recent interest. Examples of such interest include the demonstration of nonequilibrium conditions during transport, slow release of plant nutrients, and a fundamental interest in reaction mechanisms. No unified approach to these problems exists in the literature. The present study was undertaken to provide uniformity in terminology and a methodology for solving a variety of problems. The interrelationship of chemical kinetics and transport processes is examined. Particular attention is paid to potential ambiguities and alternative interpretations of concentration histories. A variety of rate law formulations are presented. Microscopic and macroscopic approaches to transport process are described. The implications of these descriptions of transport upon chemical reactions are discussed, it is concluded that reaction kinetics and transport may be readily confounded. Furthermore, different kinetic mechanisms may result in concentration histories that are not distinguishable experimentally.