Journal of the Indian Society of Soil Science
SCOPUS
  • Year: 2005
  • Volume: 53
  • Issue: 4

Kinetics of sulphate adsorption in some alfisols of Orissa

  • Author:
  • P.K. Das, S.K. Sahu1, N. Acharyya1
  • Total Page Count: 7
  • Page Number: 584 to 590

College of Agriculture (O.U.A.T.), Chiplima, Sambalpur, Orissa, 768025

*Corresponding author

1Present Address: Department of Soil Science and Agricultural Chemistry, Orissa University of Agriculture and Technology, Bhubaneswar, Orissa, 751003

Abstract

Kinetics of sulphate adsorption was studied in the surface soils and subsoils of five Alfisols of the state Orissa. Adsorption progressed at a faster rate for the initial 30 to 60 minutes in different soils with completion of 72 to 94% of total adsorption and then progressed slowly to attain equilibrium after 2 to 4 hours in different soils. The amounts of SO42−-S adsorbed at different time intervals and at equilibrium were higher in the subsoils than in the surface soils. The time-dependent SO42− adsorption was best described by the first order and Elovich equations. Clay, free Fe2O3, free Al2O3, exchangeable Ca2++Mg2+, pHw and organic carbon together accounted for 86.9% of variations in the first order apparent adsorption rate coefficient and 83.1% of variations in the Elovich adsorption rate coefficient.

Keywords

Alfisols, kinetics of sulphate adsorption, kinetic models for sulphate adsorption, apparent adsorption rate coefficient