title: New approach to solar photo-Fenton operation. Raceway ponds as tertiary treatment technology.
abstract: The photo-Fenton process has proven its efficiency in the removal of micropollutants. However, the high costs usually associated with it prevent a spread of this technology. An important factor affecting costs is the kind of photoreactor used, usually tubular with a reflecting surface. Tubular reactors like compound parabolic collectors, CPCs, involve high capital costs. In comparison, the application of less costly reactors such as the extensive raceway ponds (RPRs) would help to spread the use of the photo-Fenton process as tertiary treatment at commercial scale. As far as the authors know, RPRs have never been used in advanced oxidation processes (AOPs) applications. This work is aimed at studying the applicability of RPRs to remove micropollutants with solar photo-Fenton. For this purpose, a pesticide mixture of commercial acetamiprid (ACTM) and thiabendazole (TBZ) (100μg/L each) was used in simulated secondary effluent. Iron concentration (1, 5.5 and 10mg/L) and liquid depth (5, 10 and 15cm) were studied as process variables. TBZ was removed at the beginning of the treatment (less than 5min), although ACTM removal times were longer (20-40min for the highest iron concentrations). High treatment capacity per surface area was obtained (48mg/hm(2) with 5.5mg Fe/L and 15cm liquid depth), proving the feasibility of using RPRs for micropollutant removal.
authors: Department of Chemical Engineering, University of Almería, 04120, Almería, Spain; CIESOL, Joint Centre of the University of Almería-CIEMAT, 04120, Almería, Spain.
authors: Irene
authors: I
authors: Carra
authors: Department of Chemical Engineering, University of Almería, 04120, Almería, Spain; CIESOL, Joint Centre of the University of Almería-CIEMAT, 04120, Almería, Spain.
authors: Lucas
authors: L
authors: Santos-Juanes
authors: Department of Chemical Engineering, University of Almería, 04120, Almería, Spain.
authors: Francisco Gabriel
authors: FG
authors: Acién Fernández
authors: CIESOL, Joint Centre of the University of Almería-CIEMAT, 04120, Almería, Spain; Plataforma Solar de Almería (CIEMAT), 04200, Tabernas, Almería, Spain.
authors: Sixto
authors: S
authors: Malato
authors: Department of Chemical Engineering, University of Almería, 04120, Almería, Spain; CIESOL, Joint Centre of the University of Almería-CIEMAT, 04120, Almería, Spain. Electronic address: jsanchez@ual.es.
authors: José Antonio
authors: JA
authors: Sánchez Pérez
mesh_terms: D004785:Environmental Pollutants / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000032:analysis / Q000737:chemistry*; D000073943:Neonicotinoids; D010573:Pesticide Residues / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry; D013472:Sunlight; D013827:Thiabendazole / Q000737:chemistry; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods
chemical_list: D004785:Environmental Pollutants; C045076:Fenton's reagent; D000073943:Neonicotinoids; D010573:Pesticide Residues; D011725:Pyridines; C464485:acetamiprid; D006861:Hydrogen Peroxide; D007501:Iron; D013827:Thiabendazole
keywords: Acetamiprid; Micropollutant degradation; Photoreactor; Thiabendazol; Treatment capacity