Navegando por Autor "Prete, Maiyara Carolyne"

Filtrar resultados informando as primeiras letras
Agora exibindo 1 - 1 de 1
  • Imagem de Miniatura
    Item
    A hybrid molecularly imprinted polymer for selective adsorption of urinary S-Phenylmercapturic Acid.
    (2023) Gomes, Rafaela de Paiva; Tonucci, Marina Caldeira; Prete, Maiyara Carolyne; Tarley, César Ricardo Teixeira; Baeta, Bruno Eduardo Lobo; Afonso, Robson José de Cássia Franco
    A hybrid molecular imprinted polymer (HMIP) obtained by the organic monomer 4-vinylpyridine (4-VP) and the inorganic precursor tetraethyl orthosilicate (TEOS) was synthesized for the selective extraction of urinary S-phenylmercapturic acid (u-SPMA), a biomarker of benzene exposure. The chemical and structural characterization of the synthetic adsorbent was performed by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and textural analysis employing N2 adsorption-desorption isotherms. Selective and adsorptive performance of the imprinted polymers were evaluated by kinetic, isothermal, thermodynamic, and selectivity studies. The kinetic data were well adjusted to pseudo-second order and intraparticle diffusion models, leading to selectivity coefficient (K) value of 0.03 g mg-1 min-1 for HMIP. In addition, the adsorption isotherms were better described by the Sip model achieving a maximum adsorption capacity of 284.81 μg g-1 (at 288.15 K).