title: Application of solar AOPs and ozonation for elimination of micropollutants in municipal wastewater treatment plant effluents.
abstract: Conventional municipal wastewater treatment plants are not able to entirely degrade some organic pollutants that end up in the environment. Within this group of contaminants, Emerging Contaminants are mostly unregulated compounds that may be candidates for future regulation. In this work, different advanced technologies: solar heterogeneous photocatalysis with TiO(2), solar photo-Fenton and ozonation, are studied as tertiary treatments for the remediation of micropollutants present in real municipal wastewater treatment plants effluents at pilot plant scale. Contaminants elimination was followed by Liquid Chromatography/Quadrupole ion trap Mass Spectrometry analysis after a pre-concentration 100:1 by automatic solid phase extraction. 66 target micropollutants were identified and quantified. 16 of those contaminants at initial concentrations over 1000 ng L(-1), made up over 88% of the initial total effluent pollutant load. The order of micropollutants elimination efficiency under the experimental conditions evaluated was solar photo-Fenton > ozonation > solar heterogeneous photocatalysis with TiO(2). Toxicity analyses by Vibrio fischeri and respirometric tests showed no significant changes in the effluent toxicity after the three tertiary treatments application. Solar photo-Fenton and ozonation treatments were also compared from an economical point of view.
authors: Plataforma Solar de Almería - CIEMAT, Solar Treatment of Wastewater Group, Carretera de Senés Km 4, 04200 Tabernas, Almería, Spain.
authors: L
authors: L
authors: Prieto-Rodríguez
authors: I
authors: I
authors: Oller
authors: N
authors: N
authors: Klamerth
authors: A
authors: A
authors: Agüera
authors: E M
authors: EM
authors: Rodríguez
authors: S
authors: S
authors: Malato
mesh_terms: D048908:Aliivibrio fischeri / Q000187:drug effects; D002853:Chromatography, Liquid / Q000379:methods; D006861:Hydrogen Peroxide / Q000737:chemistry; D013058:Mass Spectrometry / Q000379:methods; D010126:Ozone / Q000737:chemistry*; D010777:Photochemistry / Q000295:instrumentation / Q000379:methods*; D013472:Sunlight; D014025:Titanium / Q000737:chemistry; D018675:Toxicity Tests; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry* / Q000633:toxicity
chemical_list: D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D010126:Ozone; D006861:Hydrogen Peroxide; D014025:Titanium