INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
REMOVAL OF THE SULFAMETHOXAZOLE ANTIBIOTIC WITH OZONE AND ORDERED MESOPOROUS ALUMINA
Autor/es:
N. INCHAURRONDO; S. ESPLUGAS; M. OTEGUI; P.HAURE; C. DI LUCA; L. DOUMIC
Lugar:
Santa Fé
Reunión:
Congreso; X Congreso Argentino de Ingeniería Química (CAIQ 2019); 2019
Institución organizadora:
AAIQ
Resumen:
Ordered mesoporous alumina (MA) was synthetized by the evaporation-induced self-assembly methodology and tested for the ozonation of sulfamethoxazole (SMX).The synthesis procedure produced ordered mesoporous alumina whose surface and structural properties exceeded those of commercial types. The MA sample displayed a BET surface area of 263 m2/g, a pore volume of 0.8 cm3/g and aligned cylindrical pores with a narrow pore size distribution centered at 10 nm (N2 Physisorption and TEM).The ozonation of SMX (20 mg/L) was carried out in a semibatch stirred tank reactor at: T = 22 ºC, [O3]gas = 10 mg/L NTP, Qgas = 40 L/h NTP, [mass] = 1 g/L, t = 120 min. Single ozonation at different initial pH, without alumina, allowed to achieve fast and complete SMX removal and mineralized up to 35% of SMX at neutral pH. The addition of MA did not affect the rate of SMX removal; however, the solid material allowed a remarkable TOC removal of 80%.Adsorption and catalytic potential of MA were assessed in different tests. For these experiments, MA behaved as a strong adsorbent at both acidic and neutral pH values, without registering catalytic effect. Furthermore, after four successive reutilization cycles of 120 min each, MA reduced its adsorption performance (XTOC = 36%) due to chemisorption of reaction intermediaries. Nevertheless, the used material was partially regenerated by direct gas-phase ozonation (CO3in = 60 mg/L NTP; 30 min).