Comparison of Kinetic Models for Boron Adsorption in Alluvium-Derived Soils of Punjab, India
2007
Arora, S. | Chahal, D.S.
The understanding of the boron (B) adsorption mechanism on soil materials is vital because plants respond primarily to the B activity in soil solution. Batch studies were conducted to investigate the adsorption behavior of B in 21 surface soils representing major soil series of Punjab. The soils varied widely in their properties. Six mathematical models (viz., zero order, first order, second order, Elovich, power function, and parabolic diffusion) were used to describe B adsorption. The B adsorption pattern was characterized by an initial fast reaction followed by a slow process, and it was complete in 24 h of equilibrium. The B equilibrium concentration was negatively correlated with clay content (r = -0.911**), organic carbon (OC) (-0.541*), and cation exchange capacity (CEC) (-0.540*) and positively with sand content (r = 0.706**). The Elovich equation was best to describe the rate of B adsorption followed by the power function.
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