Journal of the Indian Society of Soil Science

SCOPUS
  • Year: 2000
  • Volume: 48
  • Issue: 1

Adsorption-Desorption of Pendimethalin in Six Soils of India

  • Author:
  • Arvind K. Rai1, P.K. Chhonkar, N.P. Agnihotri2
  • Total Page Count: 5
  • DOI:
  • Page Number: 52 to 56

Division of Soil Science and Agricultural Chemistry, Indian Agricultural Research Institute, New Delhi, 110012.

Abstract

Adsorption of pendimethalin on six different soil samples was studied using batch, shake technique. In general, the adsorption isotherm fitted well in Freundlich equation (r2 > 0.98) and Freundlich's constant ‘K’ and ‘lin’ values were in the range of 10.98–24.41 and 0.706–0.854, respectively. The amount adsorbed was related to clay and organic carbon content (R2 = 0.89). In different soils adsorption was in the order: Mollisol > Vertisol > Inseptisol > Alfisol-1 > Alfisol-2 > Aridisol. Removal of organic matter by H2O4 oxidation caused drastic reduction in adsorption of pendimethalin. Maximum reduction occurred in Mollisol (organic carbon, 1.08%). Sorption property of soil system was not reversible and only about 29.6 to 40.1 per cent of pendimethalin could be desorbed.

Keywords

Pendimethalin, adsorption, desorption, organic maller, soil