title: Performance evaluation of different solar advanced oxidation processes applied to the treatment of a real textile dyeing wastewater.
abstract: The performance of different solar-driven advanced oxidation processes (AOPs), such as TiO2/UV, TiO2/H2O2/UV, and Fe(2+)/H2O2/UV-visible in the treatment of a real textile effluent using a pilot plant with compound parabolic collectors (CPCs), was investigated. The influence of the main photo-Fenton reaction variables such as iron concentration (20-100 mg Fe(2+) L(-1)), pH (2.4-4.5), temperature (10-50 °C), and irradiance (22-68 WUV m(-2)) was evaluated in a lab-scale prototype using artificial solar radiation. The real textile wastewater presented a beige color, with a maximum absorbance peak at 641 nm, alkaline pH (8.1), moderate organic content (dissolved organic carbon (DOC) = 129 mg C L(-1) and chemical oxygen demand (COD) = 496 mg O2 L(-1)), and high conductivity mainly associated to the high concentration of chloride (1.1 g Cl(-) L(-1)), sulfate (0.4 g SO 4 (2 -) L(- 1)), and sodium (1.2 g Na(+) L(-1)) ions. Although all the processes tested contributed to complete decolorization and effective mineralization, the most efficient process was the solar photo-Fenton with an optimum catalyst concentration of 60 mg Fe(2+) L(-1), leading to 70 % mineralization (DOCfinal = 41 mg C L(-1); CODfinal < 150 mg O2 L(-1)) at pH 3.6, requiring a UV energy dose of 3.5 kJUV L(-1) (t 30 W = 22.4 min; [Formula: see text]; [Formula: see text]) and consuming 18.5 mM of H2O2.
authors.affiliation: Postgraduate Program of Chemical Engineering, Maringá State University, Av. Colombo 5790, Maringá, PR, 87020-900, Brazil, diegomanenti@hotmail.com.
authors.forename: Diego R
authors.initials: DR
authors.lastname: Manenti
authors.forename: Petrick A
authors.initials: PA
authors.lastname: Soares
authors.forename: Tânia F C V
authors.initials: TF
authors.lastname: Silva
authors.forename: Aparecido N
authors.initials: AN
authors.lastname: Módenes
authors.forename: Fernando R
authors.initials: FR
authors.lastname: Espinoza-Quiñones
authors.forename: Rosângela
authors.initials: R
authors.lastname: Bergamasco
authors.forename: Rui A R
authors.initials: RA
authors.lastname: Boaventura
authors.forename: Vítor J P
authors.initials: VJ
authors.lastname: Vilar
mesh_terms: D057919:Biological Oxygen Demand Analysis; D002712:Chlorides; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste / Q000032:analysis; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D010782:Photolysis; D010865:Pilot Projects; D013472:Sunlight; D013696:Temperature; D013784:Textiles; D014025:Titanium / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
chemical_list: D002712:Chlorides; D006861:Hydrogen Peroxide; D007220:Industrial Waste; D007501:Iron; D014025:Titanium; D062065:Wastewater; D014874:Water Pollutants, Chemical; C045076:Fenton's reagent; C009495:titanium dioxide
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