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Title: Direct photolysis of benzoylecgonine under UV irradiation at 254nm in a continuous flow microcapillary array photoreactor
Authors: Russo, Danilo
Spasiano, Danilo
Vaccaro, Marianna
Andreozzi, Roberto
Li Puma, Gianluca
Reis, Nuno M.
Marotta, Raffaele
Keywords: Microcapillary film
Photoreactor
Photolysis
Caffeine
Benzoylecgonine
Cocaine metabolite
Water reuse
Issue Date: 2015
Publisher: © Elsevier
Citation: RUSSO, D. ...et al., 2015. Direct photolysis of benzoylecgonine under UV irradiation at 254nm in a continuous flow microcapillary array photoreactor. Chemical Engineering Journal, 283, pp. 243-250.
Abstract: Benzoylecgonine (BE) is the major metabolite of cocaine and a contaminant of emerging concern often detected in sewage treatment plant (STP) effluents and surface waters. In this study, an innovative microcapillary film (MCF) array photoreactor made of fluoropolymer material was used to determine the direct photolysis quantum yield of benzoylecgonine at 254 nm. The quantum yield of BE was found to be (6.22 ± 0.19) × 10-3 mol ein-1. The proposed methodology was validated by estimating the quantum yield of caffeine (7.48 10-4 ± 0.64) × 10-4 mol ein-1, which was found in agreement with results published in literature. The MCF uses a very small sample volume (in the order of 330μl per meter length of material) and allows extremely rapid photolysis with a short contact time ranging from a fraction of seconds to a few minutes. This new microfluidics approach presented in this study is particularly useful for determining the photochemical behavior of highly priced pharmaceuticals, illicit drugs, metabolites and uncommon or regulated substances.
Description: This paper was accepted for publication in the journal Chemical Engineering Journal and the definitive published version is available at: http://dx.doi.org/10.1016/j.cej.2015.07.061
Version: Accepted for publication
DOI: 10.1016/j.cej.2015.07.061
URI: https://dspace.lboro.ac.uk/2134/19040
Publisher Link: http://dx.doi.org/10.1016/j.cej.2015.07.061
ISSN: 1873-3212
Appears in Collections:Published Articles (Chemical Engineering)

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