Applied and Environmental Soil Science (Jan 2024)

Clay-Loaded Starch-Grafted Chitosan as Environmentally Controlled Release Material for Atrazine

  • Norbert J. Jindor,
  • Leticia P. Amenorfe,
  • Ahmed Kangmennaa,
  • Richard B. Forkuo,
  • Harry Okyere,
  • Nathaniel O. Boadi,
  • Francis Opoku,
  • Anthony A. Adimado,
  • Eric S. Agorku

DOI
https://doi.org/10.1155/aess/9985874
Journal volume & issue
Vol. 2024

Abstract

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Herein, controlled-release material for atrazine (ATZ) herbicide was formulated using different ratios of kaoline (Kao) clay-loaded starch (ST)-grafted chitosan (CHT). The materials were characterized by FTIR, SEM and EDX. The ATZ-release kinetics were studied using the zero-order, first-order and Korsmeyer–Peppas models. The percentage release of the active ATZ in the ST-g-CHT/Kao/ATZ, Kao/ATZ and bare ATZ were 9, 57 and 99 within 96 h, respectively. The Korsmeyer–Peppas model better described the release of active ATZ from the ST-g-CHT/Kao/ATZ system (R2 = 0.999), which delineates a non-Fickian diffusion mechanism that the release was controlled by diffusion and dissolution.