Solar photocatalytic mineralization of commercial pesticides: acrinathrin.
A comparative study of the degradation of commercial acrinathrin spiked in water using TiO2 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 TiO2 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.
Malato
S
S
PSA (Plataforma Solar de Almería), Spain. SIXTO.MALATO@PSA.ES
Blanco
J
J
Fernández-Alba
A R
AR
Agüera
A
A
D002384:Catalysis; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D007306:Insecticides / Q000737:chemistry* / Q000528:radiation effects; D010782:Photolysis; D010865:Pilot Projects; D011722:Pyrethrins / Q000737:chemistry* / Q000528:radiation effects; D013472:Sunlight; D014025:Titanium; D014466:Ultraviolet Rays; D014867:Water; D005466:Fluorocarbons
D007306:Insecticides; D011722:Pyrethrins; D014025:Titanium; D014867:Water; C009495:titanium dioxide; C119568:acrinathrin; D005466:Fluorocarbons