engleski

Analysis and modelling of photodegradation of neonicotinoid insecticides under the influence of UVA-LED radiation

In this work, the photocatalytic degradation of the neonicotinoid insecticide acetamiprid was investigated using a UVA-LED radiation source and TiO2 nanoparticles in a batch slurry system. All experiments were performed with the same initial acetamiprid concentration, amount of TiO2, and solution pH. The influences of three parameters such as mixing rate, radiation intensity and hydrogen peroxide concentration were studied using response surface methodology. An experimental design was prepared using the software package Design-Expert. The obtained experimental results were tested with the kinetic model for the pseudo- first order reaction and showed a good fit. The ANOVA analysis was used to obtain a linear model for predicting the system behavior and to identify significant parameters. The experimental results showed that the radiation intensity had the greatest influence on the efficiency of the photocatalytic degradation of acetamiprid. The acetamiprid conversions increase with increasing radiation intensity and hydrogen peroxide concentration and with decreasing mixing rate.

heterogeneous photocatalysis ; acetamiprid ; TiO2 ; DOE ; UVA-LED module

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