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Sustainable Development Goals
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PHOTO-DECOLORIZATION AND ECOTOXICOLOGICAL EFFECTS OF SOLAR COMPOUND PARABOLIC COLLECTOR PILOT PLANT AND ARTIFICIAL LIGHT PHOTOCATALYSIS OF INDIGO CARMINE DYE
C.I. Food Blue 1
Real wastewater
Daphnia similis
Pseudokirchneriella subcapitata
Titanium dioxide
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Abstract
The aim of this study was to analyze the photocatalytic degradation of C.I. Food Blue 1 under artificial and
solar irradiation using titanium dioxide and to evaluate the ecotoxicity of the photodegradation products
in organisms of two different food chain levels. Three different artificial-light and geometric photoreactors
were evaluated for the ideal amount of catalyst and UV-light time irradiation. The optimized
experiments were performed in a solar compound parabolic collector pilot plant with different water
matrices (distilled water, freshwater, synthetic and real MWWTP) at Plataforma Solar de Almería. Photodegradation
of the indigo dye was followed by UVeVis spectroscopy, high performance liquid chromatography,
total organic carbon and ion chromatography. Solar pilot plant photocatalysis was efficient
for different water matrices but the photodegradation was found to be somewhat slower for the more
complex matrixes. Ecotoxicological evaluation with Daphnia similis and Pseudokirchneriella subcapitata
showed that photodegradation products were more toxic than untreated indigo carmine and that titanium
residues affected the two tested species.
Keywords
Solar pilot plantC.I. Food Blue 1
Real wastewater
Daphnia similis
Pseudokirchneriella subcapitata
Titanium dioxide
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