Abstract

MARGARITA-GUERRA, María; ARRIETA-PEREZ, Rodinson  and  COLINA-MARQUEZ, José. Modeling of a Solar Heterogeneous Photocatalytic Reactor with TiO ₂ for Treatment of Wastewater Contaminated By Albendazole. Ing. compet. [online]. 2019, vol.21, n.2, 8105.  Epub Sep 30, 2019. ISSN 0123-3033.  https://doi.org/10.25100/iyc.v22i2i.8105.

Albendazole is an anthelmintic drug with antiangiogenic properties, which means that inhibits the development of new blood vessels. This causes a serious risk for the growth of fetus during pregnancy as a result. Heterogeneous photocatalysis has been proposed as an alternative for removal of this contaminant. In this study, a solar compound parabolic collector (CPC) photocatalytic reactor was modeled and simulated in order to describe the total organic carbon (TOC) degradation of commercial albendazole. The Six Flux Model approach (SFM) was used to estimate the Local Velocity Volumetric Rate of Photon Absorption (LVRPA) coupled with a Langmuir-Hinshelwood (L-H) kinetic model in order to describe the photocatalytic degradation of the TOC content of the contaminant and its photochemical oxidation products. The parameters of the L-H model were estimated from experimental data obtained with a catalyst loading of 0.6 g/l, initial pH of 5.0 and three different initial TOC concentrations of the commercial albendazole (159.95, 75.58 and 40 ppm). The rate constant (k T ) and adsorption constant (K 1 ), estimated from the parameter fitting, were 9.28×10-4 m1.5ppmW-0.5 s-1 and 3.02 × 10-2 ppm-1, respectively. The model was validated with experimental results, achieving a TOC removal of 40% with the lowest concentration of the contaminant. By simulating the process with different catalyst loadings, the maximum TOC removal was achieved with 0.21 g/L of TiO2.

Keywords : Langmuir-Hinshelwood; CPC; LVRPA; emergent pollutants; SFM.

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