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Sorption Behaviour of Forchlorfenuron in Soil

Abstract

Adsorption of forchlorfenuron on three Indian soils reached equilibrium within 48 h with rate of adsorption being highest on sandy-loam followed by clay and silty-clay soils. The relative adsorptivity of the test soils could be attributed to the different organic matter and clay contents. Desorption rate followed the reverse trend. The rate constants for adsorption and desorption at 298 and 308 K were determined from Lindstrom model, which simultaneously evaluated adsorption and desorption kinetics. The data for rate constants, activation energies, enthalpy of activation, entropy of activation and free energy indicated chemical adsorption of forchlorfenuron on soil. A good fit to the linear and Freundlich isotherms was observed with correlation coefficients >0.97. The groundwater ubiquity score for different soils varied between 1.6 and 2.2, on the basis of which forchlorfenuron could be categorised as a chemical with low to medium leaching category.

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Correspondence to Kaushik Banerjee.

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Banerjee, K., Oulkar, D.P., Patil, S.H. et al. Sorption Behaviour of Forchlorfenuron in Soil. Bull Environ Contam Toxicol 80, 201–205 (2008). https://doi.org/10.1007/s00128-007-9345-x

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Keywords

  • Forchlorfenuron
  • Soil
  • Adsorption kinetics
  • Adsorption isotherm
  • Desorption