Baghdad Science Journal | Current Issue

Volume 15 - Issue 2

(18 Articles)

(P) ISSN:2078-8665

(E) ISSN:2411-7986

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2018 > Issue 2 > Volume 15

Degradation of Dazomet by Thermal Fenton and Photo-Fenton Processes under UV and Sun lights at Different Temperatures

Eman A. Mohammed | Souad A. Mousa

Abstract:

In this research, the degradation of Dazomet has been studied by using thermal Fenton process and photo-Fenton processes under UV and lights sun. The optimum values of amounts of the Fenton reagents have been determined (0.07g FeSO4 .7H2O, 3.5µl H2O2) at 25 °C and at pH 7 where the degradation percentages of Dazomet were recorded high. It has been found that solar photo Fenton process was more effective in degradation of Dazomet than photo-Fenton under UV-light and thermal Fenton processes, the percentage of degradation of Dazomet by photo-Fenton under sun light are 88% and 100% at 249 nm and 281 nm respectively, while the percentages of degradation for photo-Fenton under UV-light are 87%, 96% and for thermal Fenton are 70% and 66.8% at 249 nm and 281 nm respectively. In this research the effect of temperature on all the reactions has been studied in the range 25°C-45°C, it has been noticed that the reaction rate constant (k) has increased with increasing temperature, and the best percentage degradation of Dazomet was at 45°C in all processes, so, the thermodynamic functions ΔG*, ΔH*, ΔS* have been calculated.

Keywords:

Fenton processes, Dazomet degradation, photocatalysts, Photodegradation of Pesticides..

Published Date:03/06/2018 | Total Downloads:(12) | Doi:( http://dx.doi.org/10.21123/bsj.2018.15.2.0158 )