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Electrochemical Evaluation of the Environmental Stability of Thiamethoxam Insecticide in Soil Matrices

  • Unique Paper ID: 179067
  • Volume: 11
  • Issue: 12
  • PageNo: 5070-5075
  • Abstract:
  • The differential pulse polarography (DPP) method was developed and validated to investigate the electrochemical and thermodynamic properties of thiamethoxam in soil. This validated technique was successfully employed to assess the thermodynamic parameters of thiamethoxam adsorption behavior. The adsorption of thiamethoxam in four different soils followed the Freundlich isotherm, with 1/n values less than one, indicating favorable sorption conditions. Sorption strength was higher in soils with greater organic carbon content, with the order of sorption strength being S1 > S2 > S3 > S4. The Koc values indicated that thiamethoxam was more mobile in soils with lower organic matter content. In sandy soils (S3 and S4), the pesticide's leaching potential was enhanced due to the coarser texture and lower sorption capacity. Sorption coefficients Kd and Kf showed strong positive correlations with both organic carbon content and cation exchange capacity (CEC), reflecting the combined influence of organic matter and clay content on sorption behavior. These results highlight that the mobility and retention of neonicotinoids in soils are significantly influenced by soil properties, providing valuable insights for the development of effective environmental management strategies for pesticide use.
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Cite This Article

  • ISSN: 2349-6002
  • Volume: 11
  • Issue: 12
  • PageNo: 5070-5075

Electrochemical Evaluation of the Environmental Stability of Thiamethoxam Insecticide in Soil Matrices

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