Pedosphere 9(3): 213--218, 1999
ISSN 1002-0160/CN 32-1315/P
©1999 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Similarities and differences between Freundlich kinetic equation and two-constant equation
ZHANG Zeng-Qiang1 and ZHANG Yi-Ping2
1 Deparfment of Basic Sciences, Northwestern Agricultural University, Yangling 712100 (China)
2 Department of Resources and Environmental Sciences, Northwestern Agricultural University, Yangling 712100 (China)
ABSTRACT
      A mathematical expression of Freundlich kinetic equation, lnS=A/i>'+B'lnt, is presented, and the physical meanings of its parameters are indicated. Although the Freundlich kinetic equation and the two-constant equation are the same in the form, the derivation of the Freundlich kinetic equation is precise, while the derivation of the two-constant equation has some contradictions and is unreasonable. And it is suggested that the Freundlich kinetic equation should have priority over the two-constant equation to be used.
Key Words:  Freundlich kinetic equation, parameters, physical meaning, two-constant equation
Citation: Zhang, Z. Q. and Zhang, Y. P. 1999. Similarities and differences between Freundlich kinetic equation and two-constant equation. Pedosphere. 9(3): 213-218.
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