Elimination of drugs of abuse and their toxicity from natural waters by photo-Fenton treatment

This paper investigates the elimination of drugs of abuse from six different chemical classes and their metabolites in natural fluvial waters (nearby the output of a sewage system). Mineralization of these substances and toxicological characterization before and after treatment by a heterogeneous ph...

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Bibliographic Details
Published in:	The Science of the total environment Vol. 520; pp. 198 - 205
Main Authors:	Catalá, M., Domínguez-Morueco, N., Migens, A., Molina, R., Martínez, F., Valcárcel, Y., Mastroianni, N., López de Alda, M., Barceló, D., Segura, Y.
Format:	Journal Article
Language:	English
Published:	Netherlands Elsevier B.V 01-07-2015
Subjects:	Bioassay Catalysts Chemical analysis Drinking water Drugs Ferns Hydrogen peroxide Hydrogen Peroxide - chemistry Illicit substances Iron - chemistry Oxidation Oxidation-Reduction Pharmaceuticals Photo-Fenton Photochemical Processes Spores Street Drugs - analysis Street Drugs - toxicity Surface water Toxicity Waste Disposal, Fluid - methods Water Pollutants, Chemical - analysis Water Pollutants, Chemical - toxicity Water Purification - methods OH-THC Drinking water BE LODet ALP RW Photo-Fenton LSD OXO EDDP STP THC MDMA SRM Illicit substances THC-COOH MA DAs LSD DIAZ AOP CE Bioassay ALCs TOC 6ACM CO LOR MOR HER Surface water SPE-LC–MS/MS EPH PET Pharmaceuticals
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Summary:	This paper investigates the elimination of drugs of abuse from six different chemical classes and their metabolites in natural fluvial waters (nearby the output of a sewage system). Mineralization of these substances and toxicological characterization before and after treatment by a heterogeneous photo-Fenton system has been evaluated. This advanced oxidation technology was able to significantly reduce the concentration of the drugs of abuse in all the tested conditions (different hydrogen peroxide and catalyst loadings). However, toxicological analyses measured as inhibition of fern spore mitochondrial activity, showed only a complete elimination of acute and chronic toxicity when a higher solid catalyst loading was used (0.6g/L). A lower catalyst loading of 0.2g/L was not enough for toxicity elimination. These results evidence the need for combining toxicological tests and chemical analyses in order to establish the effectiveness of the water treatment technologies based on advanced oxidation processes. •Photo-Fenton reactions eliminate drugs of abuse in natural fluvial water.•High chemical degradation does not ensure toxicity elimination.•Catalyst loading is critical for an efficient toxicity elimination.•Toxicology testing is mandatory in decontamination assessment.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0048-9697 1879-1026
DOI:	10.1016/j.scitotenv.2015.03.042