title: Solar photocatalytic ozonation of a mixture of pharmaceutical compounds in water.
abstract: Aqueous solutions of mixtures of four pharmaceutical compounds (atenolol, hydrochlorothiazide, ofloxacin and trimethoprim) both in Milli-Q ultrapure water and in a secondary effluent from a municipal wastewater treatment plant have been treated at pH 7 by different oxidation methods, such as conventional ozonation, photolytic ozonation, TiO2 catalytic ozonation, TiO2 photocatalytic oxidation and TiO2 photocatalytic ozonation. Experiments were carried out using a solar compound parabolic concentrator. The performance results have been compared in terms of removal of emerging contaminants (ECs), generation rate of phenolic intermediates, organic matter mineralization, ecotoxicity removal and enhancement of biodegradability. Also, the consumption of ozone to achieve certain treatment goals (95% removal of ECs and 40% mineralization) is discussed. Results reveal that solar photocatalytic ozonation is a promising oxidation method as it led to the best results in terms of EC mineralization (∼85%), toxicity removal (∼90%) and efficient use of ozone (∼2mgO3mgEC(-1) to achieve complete EC removal and ∼18mgO3mgTOC(-1) to achieve 40% EC mineralization, respectively).
authors: Departamento de Ingeniería Química y Química Física, Universidad de Extremadura, 06006 Badajoz, Spain. Electronic address: graciamm@unex.es.
authors: Gracia
authors: G
authors: Márquez
authors: Departamento de Ingeniería Química y Química Física, Universidad de Extremadura, 06006 Badajoz, Spain. Electronic address: evarguez@unex.es.
authors: Eva M
authors: EM
authors: Rodríguez
authors: Departamento de Ingeniería Química y Química Física, Universidad de Extremadura, 06006 Badajoz, Spain. Electronic address: fbeltran@unex.es.
authors: Fernando J
authors: FJ
authors: Beltrán
authors: Departamento de Ingeniería Química y Química Física, Universidad de Extremadura, 06006 Badajoz, Spain. Electronic address: pmalvare@unex.es.
authors: Pedro M
authors: PM
authors: Álvarez
mesh_terms: D001262:Atenolol; D001673:Biodegradation, Environmental; D002384:Catalysis; D006852:Hydrochlorothiazide; D008956:Models, Chemical; D015394:Molecular Structure; D015242:Ofloxacin; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry*; D004364:Pharmaceutical Preparations / Q000032:analysis*; D010782:Photolysis; D013472:Sunlight; D014025:Titanium / Q000737:chemistry; D014295:Trimethoprim; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D001262:Atenolol; D006852:Hydrochlorothiazide; D015242:Ofloxacin; D010126:Ozone; D004364:Pharmaceutical Preparations; D014025:Titanium; D014295:Trimethoprim; D062065:Wastewater; D014874:Water Pollutants, Chemical; C009495:titanium dioxide
keywords: Ozonation; Pharmaceuticals; Solar photocatalytic ozonation; Water treatment