Photodegradation of ibuprofen under UV-Vis irradiation: mechanism and toxicity of photolysis products. 2015

Fu Hua Li, and Kun Yao, and Wen Ying Lv, and Guo Guang Liu, and Ping Chen, and Hao Ping Huang, and Ya Pu Kang
School of Environmental Science and Engineering, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, People's Republic of China.

The photodegradation of ibuprofen (IBP) in aqueous media was studied in this paper. The degradation mechanism, the reaction kinetics and toxicity of the photolysis products of IBP under UV-Vis irradiation were investigated by dissolved oxygen experiments, quenching experiments of reactive oxygen species (ROS), and toxicity evaluation utilizing Vibrio fischeri. The results demonstrated that the IBP degradation process could be fitted by the pseudo first-order kinetics model. The degradation of IBP by UV-Vis irradiation included direct photolysis and self-sensitization via ROS. The presence of dissolved oxygen inhibited the photodegradation of IBP, which indicated that direct photolysis was more rapid than the self-sensitization. The contribution rates of ·OH and (1)O2 were 21.8 % and 38.6 % in self-sensitization, respectively. Ibuprofen generated a number of intermediate products that were more toxic than the base compound during photodegradation.

UI MeSH Term Description Entries
D007052 Ibuprofen A non-steroidal anti-inflammatory agent with analgesic, antipyretic, and anti-inflammatory properties Advil,Benzeneacetic Acid, alpha-methyl-4-(2-methylpropyl)- trimethylsilyl ester,Brufen,Ibumetin,Ibuprofen, (+-)-Isomer,Ibuprofen, (R)-Isomer,Ibuprofen, (S)-Isomer,Ibuprofen, Aluminum Salt,Ibuprofen, Calcium Salt,Ibuprofen, Copper (2+) Salt,Ibuprofen, Magnesium Salt,Ibuprofen, Potassium Salt,Ibuprofen, Sodium Salt,Ibuprofen, Zinc Salt,Ibuprofen-Zinc,Motrin,Nuprin,Rufen,Salprofen,Trauma-Dolgit Gel,alpha-Methyl-4-(2-methylpropyl)benzeneacetic Acid,Ibuprofen Zinc,Trauma Dolgit Gel
D007700 Kinetics The rate dynamics in chemical or physical systems.
D010100 Oxygen An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration. Dioxygen,Oxygen-16,Oxygen 16
D010782 Photolysis Chemical bond cleavage reactions resulting from absorption of radiant energy. Photodegradation
D014466 Ultraviolet Rays That portion of the electromagnetic spectrum immediately below the visible range and extending into the x-ray frequencies. The longer wavelengths (near-UV or biotic or vital rays) are necessary for the endogenous synthesis of vitamin D and are also called antirachitic rays; the shorter, ionizing wavelengths (far-UV or abiotic or extravital rays) are viricidal, bactericidal, mutagenic, and carcinogenic and are used as disinfectants. Actinic Rays,Black Light, Ultraviolet,UV Light,UV Radiation,Ultra-Violet Rays,Ultraviolet Light,Ultraviolet Radiation,Actinic Ray,Light, UV,Light, Ultraviolet,Radiation, UV,Radiation, Ultraviolet,Ray, Actinic,Ray, Ultra-Violet,Ray, Ultraviolet,Ultra Violet Rays,Ultra-Violet Ray,Ultraviolet Black Light,Ultraviolet Black Lights,Ultraviolet Radiations,Ultraviolet Ray
D014874 Water Pollutants, Chemical Chemical compounds which pollute the water of rivers, streams, lakes, the sea, reservoirs, or other bodies of water. Chemical Water Pollutants,Landfill Leachate,Leachate, Landfill,Pollutants, Chemical Water
D017382 Reactive Oxygen Species Molecules or ions formed by the incomplete one-electron reduction of oxygen. These reactive oxygen intermediates include SINGLET OXYGEN; SUPEROXIDES; PEROXIDES; HYDROXYL RADICAL; and HYPOCHLOROUS ACID. They contribute to the microbicidal activity of PHAGOCYTES, regulation of SIGNAL TRANSDUCTION and GENE EXPRESSION, and the oxidative damage to NUCLEIC ACIDS; PROTEINS; and LIPIDS. Active Oxygen Species,Oxygen Radical,Oxygen Radicals,Pro-Oxidant,Reactive Oxygen Intermediates,Active Oxygen,Oxygen Species, Reactive,Pro-Oxidants,Oxygen, Active,Pro Oxidant,Pro Oxidants,Radical, Oxygen
D048908 Aliivibrio fischeri A species of gram-negative bacteria in the genus ALIIVIBRIO, which exhibits LUMINESCENCE. A. fischeri is found in a symbiotic relationship with the SQUID Euprymna scolopes. Achromobacter fischeri,Bacillus fischeri,Bacillus phosphorescens indigenus,Einheimischer Leuchtbacillus,Microspira fischeri,Microspira marina,Photobacterium fischeri,Vibrio fischeri,Vibrio noctiluca
D055668 Photochemical Processes Chemical reactions effected by light. Processes, Photochemical
D018675 Toxicity Tests An array of tests used to determine the toxicity of a substance to living systems. These include tests on clinical drugs, foods, and environmental pollutants. Tests, Toxicity,Test, Toxicity,Toxicity Test

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