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Simultaneous ozonation of 90 organic micropollutants including illicit drugs and their metabolites in different water matrices.

Zoumpouli, Garyfalia A.; Siqueira Souza, Fernanda; Petrie, Bruce; Féris, Liliana Amaral; Kasprzyk-Hordern, Barbara; Wenk, Jannis

Authors

Garyfalia A. Zoumpouli

Fernanda Siqueira Souza

Bruce Petrie

Liliana Amaral Féris

Barbara Kasprzyk-Hordern

Jannis Wenk j.h.wenk@bath.ac.uk



Abstract

The ozonation of 90 chemically diverse organic micropollutants (OMPs) including four classes of illicit drugs and their metabolites was studied in pure buffered water, tap water and wastewater effluent at three specific ozone doses and three pH levels. The second order rate constants for the reaction of 40 OMPs with ozone were known and span across 8 orders of magnitude, from below 1 M−1 s−1 to above 107 M−1 s−1. 47 of the tested OMPs were removed to at least 90% at the highest specific ozone dose of 0.3 mM O3 per mM C at pH 7. However, most illicit drugs, including cocainics, amphetamines and ecstasy-group compounds, were ozone-resistant due to their lack of ozone-reactive functional groups. Exceptions included some opioids and the cocaine biomarker anhydroecgonine methylester which contain olefinic bonds and/or activated benzene rings. Different removal trends at different pH for OMPs were due to the combined effect of target compound speciation and ozone stability, leading to elimination of less than 70% for all OMPs at pH 11. In both tap water and wastewater effluent scavenging by matrix components led to lower ozone exposure compared to pure buffered water and consequently lower removal of OMPs. This multi-compound ozonation study utilised liquid chromatography-mass spectrometry to provide a large dataset on the removal of environmentally relevant OMPs, including those of interest for drinking water regulations. Besides including pharmaceutically active compounds that have not been studied with ozone before (e.g. gliclazide, anhydroecgonine methylester, quetiapine, 6-monoacetylmorphine), this study simultaneously shows ozonation data for a wide range of illicit drugs.

Journal Article Type Article
Journal Environmental science: water research and technology
Electronic ISSN 2053-1419
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Institution Citation ZOUMPOULI, G.A., SIQUEIRA SOUZA, F., PETRIE, B., FÉRIS, L.A., KASPRZYK-HORDERN, B. and WENK, J. [2020]. Simultaneous ozonation of 90 organic micropollutants including illicit drugs and their metabolites in different water matrices. Environmental science: water research and technology [online], Advanced Article. Available from: https://doi.org/10.1039/d0ew00260g
DOI https://doi.org/10.1039/d0ew00260g
Keywords Ozonation; Micorpollutants; Illicit drugs
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