Fotokatalitička degradacija karbamatnih insekticida - efekti različitih parametara

Abstract

Proučavana je fotokatalitička degradacija model jedinjenja karbamatnog insekticida karbofurana u vodi, u prisustvu polihromatske svetlosti i katalizatora ZnO i TiO2. Ispitivan je uticaj reakcionih parametara, kao što su vreme reakcije i početna koncentracija karbofurana, na fotokatalitičku degradaciju. Ustanovljeno je da je reakcija bila pseudo-prvog reda i primenom optimalnih uslova skoro potpuno uklanjanje 88,4 mg L-1 karbofurana dogodilo se u toku 2 sata. Reakcije su praćene primenom UV spektroskopije i tečne hromatografije visokih performansi (HPLC). Naknadno, upoređena je fotokatalitička efikasnost katalizatora ZnO i TiO2 primenom identičnih reakcionih uslova.

Photocatalytic degradation of a model compound of the carbamate insecticide carbofuran in water was studied using polychromatic light and ZnO and TiO2 catalysts. The influence of operational parameters, such as reaction time and initial carbofuran concentration, on photocatalytic degradation was studied. A pseudo-first-order kinetic model was established and an almost complete removal of 88.4 mg L-1 of carbofuran occurred within 2 h under optimized conditions. The reactions were examined by UV spectroscopy and high performance liquid chromatography (HPLC). In addition, the photocatalytic efficiencies of ZnO and TiO2 were compared under the same reaction conditions.