ANNA CAROLINA SALAZAR REIS
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Artigo IPEN-doc 25127 Solar/TiO2 photodecomposition and adsorption of tertiary antibiotics systems2018 - ORTIZ, NILCE; LIMA, GISELLE N.S.; NICOLAU, THAMIRES S.; REIS, ANNA C.S.The antibiotic residues are present usually in mixtures in soils and rivers sediment in the range of ng L-1 to μg L-1 around the world and cause, among many things, the proliferation of super-resistant bacteria. The study analyzes the efficiency of titanium dioxide (TiO2) and the solar photodecomposition of binary and tertiary systems of cephalexin, amoxicillin, and oxytetracicline from contaminated water discharges. The calculated kinetic constants of pseudo-first order, pseudo-second order and intraparticle diffusion confirm the better agreement with the pseudo-second-order. The isotherms parameters and constants of Langmuir, Freundlich, Redlich-Peterson (R-P) indicated the Langmuir and R-P isotherms have better correspondence, and the experimental results indicate 45% of removal percentage of antibiotics mixture in just 120 min of time stirring. The amoxicillin has the higher removal percentages followed by cephalexin and the lowest percentage was for oxytetraciclin. This behavior is explained by the chemical bond energy of the chemical structure, lower for amoxicillin increasing until the oxytetraccilin structure. The water treatment using Advanced Oxidative Processes - POA with TiO2 and solar radiation at different concentrations an mixtures of antibiotics followed by adsorption process rises as an efficient and ready to use water treatment to reach better water quality for reuse purposes.Resumo IPEN-doc 21452 Tratamento de águas superficiais a partir do processo da adsorção e fotocomposição com a utilização de limonita, quitosana e radiação UV2015 - REIS, ANNA C.S.; ORTIZ, NILCE