title: Adsorption-desorption and leaching behavior of kresoxim-methyl in different soils of India: kinetics and thermodynamic studies.
abstract: The sorption and leaching behavior of kresoxim-methyl was explored in four different soils, viz., clay, sandy loam, loamy sand, and sandy loam (saline), representing vegetables and fruits growing regions of India. Adsorption of kresoxim-methyl in all the soils reached equilibrium within 48 h. The rate constants for adsorption and desorption at two different temperatures were obtained from the 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 physical adsorption of kresoxim-methyl on soil. The relative adsorptivity of the test soils could be attributed to different organic matter and clay contents of the soils. A good fit to the linear and Freundlich isotherms was observed for both adsorption as well as desorption. The groundwater ubiquity score (GUS) for different soils varied between 0 and 2.26. The GUS and leaching study indicated moderately low leaching potential of kresoxim-methyl. The adsorption on four soil types largely depended on the soil physicochemical properties such as organic carbon content, cation-exchange capacity, and texture of the soil.
authors.affiliation: National Referral Laboratory, National Research Centre for Grapes, Pune, 412 307, India.
authors.forename: Rupali P
authors.initials: RP
authors.lastname: Sabale
authors.forename: Ahammed
authors.initials: A
authors.lastname: Shabeer T P
authors.forename: Soma
authors.initials: S
authors.lastname: Dasgupta
authors.forename: Sagar C
authors.initials: SC
authors.lastname: Utture
authors.forename: Kaushik
authors.initials: K
authors.lastname: Banerjee
authors.forename: Dasharath P
authors.initials: DP
authors.lastname: Oulkar
authors.forename: Pandurang G
authors.initials: PG
authors.lastname: Adsule
authors.forename: Madhukar B
authors.initials: MB
authors.lastname: Deshmukh
mesh_terms: D000327:Adsorption; D000538:Aluminum Silicates; D000077215:Clay; D019277:Entropy; D007194:India; D007700:Kinetics; D008689:Methacrylates / Q000032:analysis / Q000737:chemistry; D010648:Phenylacetates / Q000032:analysis / Q000737:chemistry*; D018570:Risk Assessment; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000737:chemistry*; D000073739:Strobilurins; D013816:Thermodynamics; D014877:Water Pollution, Chemical
chemical_list: D000538:Aluminum Silicates; D008689:Methacrylates; D010648:Phenylacetates; D012987:Soil; D012989:Soil Pollutants; D000073739:Strobilurins; C469328:kresoxim-methyl; D000077215:Clay