title: Amoxicillin degradation from contaminated water by solar photocatalysis using response surface methodology (RSM).
abstract: In this study, the solar photocatalytic process in a pilot plant with compound parabolic collectors (CPCs) was performed for amoxicillin (AMX) degradation, an antibiotic widely used in the world. The response surface methodology (RSM) based on Box-Behnken statistical experiment design was used to optimize independent variables, namely TiO2dosage, antibiotic initial concentration, and initial pH. The results showed that AMX degradation efficiency affected by positive or negative effect of variables and their interactions. The TiO2dosage, pH, and interaction between AMX initial concentration and TiO2dosage exhibited a synergistic effect, while the linear and quadratic term of AMX initial concentration and pH showed antagonistic effect in the process response. Response surface and contour plots were used to perform process optimization. The optimum conditions found in this regard were TiO2dosage = 1.5 g/L, AMX initial concentration = 17 mg/L, and pH = 9.5 for AMX degradation under 240 min solar irradiation. The photocatalytic degradation of AMX after 34.95 kJUV/L accumulated UV energy per liter of solution was 84.12 % at the solar plant.
authors.affiliation: Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, 81746-73441, Iran. f.moosavi@eng.ui.ac.ir.
authors.forename: Fatemeh Sadat
authors.initials: FS
authors.lastname: Moosavi
authors.affiliation: Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, 81746-73441, Iran. ttavakoli@eng.ui.ac.ir.
authors.forename: Touraj
authors.initials: T
authors.lastname: Tavakoli
mesh_terms: D000658:Amoxicillin / Q000032:analysis / Q000737:chemistry*; D000900:Anti-Bacterial Agents / Q000032:analysis / Q000737:chemistry*; D002384:Catalysis; D010782:Photolysis; D013472:Sunlight; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*; D014876:Water Pollution
chemical_list: D000900:Anti-Bacterial Agents; D014874:Water Pollutants, Chemical; D000658:Amoxicillin
keywords: Amoxicillin; Compound parabolic collector; Environment; Photocatalyst; Solar treatment; Wastewater