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Article

Kinetics and Mechanistic Studies of Photochemical and Oxidative Stability of Galaxolide

Faculty of Chemistry, University of Bialystok, 15-245 Bialystok, Poland
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Author to whom correspondence should be addressed.
Academic Editor: Sergi Garcia-Segura
Water 2021, 13(13), 1813; https://doi.org/10.3390/w13131813
Received: 26 May 2021 / Revised: 22 June 2021 / Accepted: 28 June 2021 / Published: 30 June 2021
(This article belongs to the Special Issue New Aspects of Occurrence and Removal of Emerging Pollutants)
Studies on kinetics of galaxolide (HHCB) degradation under influence of UV, simulated sunlight and some advanced oxidation processes (H2O2, UV/H2O2, and Vis/H2O2) were conducted. Galaxolide appeared to be a photolabile compound. The first-order kinetics model was assumed for all studied processes. It was observed that basic pH favored HHCB degradation. The influence of natural matrices (river water and artificial sweat) on direct photolysis of HHCB was examined. It was stated that the process of the photodegradation proceeded slower at the presence of each matrix. HHCB lactone was identified using the GC-MS technique. The recorded chromatograms showed that apart from the lactone, other degradation products were formed that we could not identify. In order to deeper understand the HHCB degradation process, DFT calculations were performed. The results pointed out that OH radicals play a key role in HHCB decomposition, which mainly proceeds via H abstractions as well as OH additions. It follows from the calculations that the visible light is sufficient to initiate the advanced oxidation processes (AOPs) under the oxidative conditions, whereas UV irradiation is needed to start decay with no oxidative agents. View Full-Text
Keywords: galaxolide (HHCB); photodegradation processes; advanced oxidation processes; DFT study galaxolide (HHCB); photodegradation processes; advanced oxidation processes; DFT study
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MDPI and ACS Style

Sokol, A.; Ratkiewicz, A.; Tomaszewska, I.; Karpinska, J. Kinetics and Mechanistic Studies of Photochemical and Oxidative Stability of Galaxolide. Water 2021, 13, 1813. https://doi.org/10.3390/w13131813

AMA Style

Sokol A, Ratkiewicz A, Tomaszewska I, Karpinska J. Kinetics and Mechanistic Studies of Photochemical and Oxidative Stability of Galaxolide. Water. 2021; 13(13):1813. https://doi.org/10.3390/w13131813

Chicago/Turabian Style

Sokol, Aneta, Artur Ratkiewicz, Iwona Tomaszewska, and Joanna Karpinska. 2021. "Kinetics and Mechanistic Studies of Photochemical and Oxidative Stability of Galaxolide" Water 13, no. 13: 1813. https://doi.org/10.3390/w13131813

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