Formulações de atrazina em xerogéis: síntese e caracterização

Química Nova

Letícia Gomes De Ávila²  Simone Benvenuti Leite²  Deborah Pinheiro Dick²  Adriana Raffin Pohlmann¹ 

[1] ,Universidade Federal do Rio Grande do Sul Instituto de Química Departamento de Físico-QuímicaPorto Alegre RS ,Brasil

关键词: sol-gel;    sorption;    soil;   

DOI  :  10.1590/S0100-40422009000700009

来源: SciELO

【 摘 要 】

In this study, controlled release formulations of Atrazine (ATZ) were synthesized by the sol-gel method and characterized by elemental, FTIR, SEM, BET and DSC analyses. The release kinetic of ATZ from the formulations in CaCl2 0.01 mol L-1 medium was monitored by UV/Vis spectroscopy. In all formulations, ATZ was physically dispersed on the Si-polymer, and the dispersion grade decreased with increasing amount of herbicide. The ATZ release kinetics was controlled mainly by dissolution, and the data could be fitted to the Korsmeyer - Pepper model. The ATZ as xerogel presents a lower affinity for soil than as granulated form.

【 授权许可】

CC BY-NC   
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