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Combination of Black‐Light Photo‐catalysis and Ozonation for Emerging Contaminants Degradation in Secondary Effluents
Author(s) -
Encinas Á.,
Rivas F. J.,
Beltrán F. J.,
Oropesa A.
Publication year - 2013
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201200311
Subject(s) - effluent , mineralization (soil science) , chemistry , degradation (telecommunications) , ozone , photocatalysis , aqueous solution , catalysis , environmental chemistry , total organic carbon , nuclear chemistry , chemical engineering , environmental engineering , organic chemistry , environmental science , telecommunications , computer science , nitrogen , engineering
A water solution of emerging contaminants (ECs) was treated by advanced oxidation systems. Ozone‐based processes led to the highest ECs degradation rates. Regardless of the nature of the aqueous matrix, no differences in EC removal were obtained when O 3 was added. Mineralization occurred to some extent when activated carbon (AC) or O 3 were present. O 3 , UVA/TiO 2 /O 2 , and UVA/TiO 2 /O 3 processes were applied in runs carried out with low ECs concentration. Single ozonation and photocatalytic ozonation led to the complete ECs degradation in less than 5 min. When a secondary effluent was used, the efficiency of the technologies decreased. With the exception of caffeine, a detrimental effect of other organic/inorganic compounds present in secondary effluents was observed.