Identifiability of first order reaction systems

1979 ◽  
Vol 11 (1) ◽  
pp. 39-43 ◽  
Author(s):  
S. Vajda
Keyword(s):  
Order Reaction ◽  
First Order Reaction ◽  
Reaction Systems ◽  
First Order

Design procedure for stable operations of first-order reaction systems in a CSTR

AIChE Journal ◽  
1997 ◽  
Vol 43 (4) ◽  
pp. 1060-1068 ◽  
Author(s):  
Johan J. Heiszwolf ◽  
Jan M. H. Fortuin
Keyword(s):  
Design Procedure ◽  
Order Reaction ◽  
First Order Reaction ◽  
Reaction Systems ◽  
First Order

Leaching Kinetics of Atrazine and Inorganic Chemicals in Tilled and Orchard Soils

2014 ◽  
Vol 28 (2) ◽  
pp. 231-237 ◽  
Author(s):  
Lech W. Szajdak ◽  
Jerzy Lipiec ◽  
Anna Siczek ◽  
Artur Nosalewicz ◽  
Urszula Majewska
Keyword(s):  
Reaction Rate ◽  
Inorganic Compounds ◽  
Model Performance ◽  
Order Reaction ◽  
First Order Reaction ◽  
Order Kinetic ◽  
Time Data ◽  
First Order ◽  
Concentration Changes ◽  
Reaction Constants

Abstract The aim of this study was to verify first-order kinetic reaction rate model performance in predicting of leaching of atrazine and inorganic compounds (K+1, Fe+3, Mg+2, Mn+2, NH4 +, NO3 - and PO4 -3) from tilled and orchard silty loam soils. This model provided an excellent fit to the experimental concentration changes of the compounds vs. time data during leaching. Calculated values of the first-order reaction rate constants for the changes of all chemicals were from 3.8 to 19.0 times higher in orchard than in tilled soil. Higher first-order reaction constants for orchard than tilled soil correspond with both higher total porosity and contribution of biological pores in the former. The first order reaction constants for the leaching of chemical compounds enables prediction of the actual compound concentration and the interactions between compound and soil as affected by management system. The study demonstrates the effectiveness of simultaneous chemical and physical analyses as a tool for the understanding of leaching in variously managed soils.

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