Solar photocatalytic mineralization of commercial pesticides: acrinathrin

• Published in: Chemosphere (Oxford) Vol. 40; no. 4; pp. 403 - 409
• Main Authors: Malato, S, Blanco, J, Fernández-Alba, A.R, Agüera, A
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.02.2000; Elsevier
• Subjects: Acrinathrin; Agronomy. Soil science and plant productions; Applied sciences; Biological and medical sciences; Biological and physicochemical phenomena; Catalysis; Chromatography, High Pressure Liquid - methods; Earth sciences; Earth, ocean, space; Engineering and environment geology. Geothermics; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; Gas Chromatography-Mass Spectrometry - methods; Insecticides - chemistry; Insecticides - radiation effects; mineralization; Natural water pollution; Photocatalysis; Photolysis; Pilot Projects; Pollution; Pollution, environment geology; Pyrethrins - chemistry; Pyrethrins - radiation effects; pyrethroid insecticides; Soil and water pollution; Soil science; Solar energy; solar radiation; Sunlight; Titanium; titanium dioxide; Ultraviolet Rays; Water; Water treatment and pollution; Spain; Acrinathrin; Photolysis; Photocatalysis; Solar energy; Chemical analysis; Insecticide; Pesticides; Pyrethroids; Peroxodisulfates; Heterogeneous catalysis; Decontamination; Mineralization; Qualitative analysis; Water pollution; Solar radiation; Titanium oxide; Degradation product; Comparative study; Quantitative analysis; Photochemical degradation
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/S0045-6535(99)00267-2

A comparative study of the degradation of commerical acrinathrin spiked in water using TiO 2 photocatalysis and photolysis under sunlight was performed. Samples were analysed by liquid chromatography-diode array detector (HPLC–DAD) and gas chromatography-ion trap-mass spectrometric detector (GC–ITMS). Additional total organic carbon (TOC) analyses were carried out to evaluate the mineralisation rates. One photoproduct, 2-phenoxy benzaldehyde, was unequivocally identified and evaluated by GC–ITMS during the processes. Although acrinathrin is almost destroyed when exposed to irradiation for more than 400 h, photocatalysis with TiO 2 noticeably reduced degradation to a few hours. In this case, with the additional presence of peroxydisulphate, in less than 2 h acrinathrin is completely destroyed. Mineralisation of acrinathrin, without catalyst, was only around 50% after 400 h of irradiation.