کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5748062 | 1618927 | 2017 | 7 صفحه PDF | دانلود رایگان |
- A significant synergistic effect was observed for solar-enhanced S2O82â/Fe2+ system.
- Solar/S2O82â/Fe2+ treatment resulted in 100% ATZ removal and 20% TOC reduction.
- ATZ toxicity was reduced to non-toxic levels.
- In situ generated SO4-
- and
- ÐÐ radicals were the major reactive species.
The oxidation of s-triazines (using atrazine (ATZ) as a model compound) by a solar-enhanced Fenton-like process involving persulfate and ferrous ion was studied. A flow-through tubular photoreactor was employed for the experiments. The solar-enhanced oxidative system involving ferrous ion and persulfate (Solar/S2O82â/Fe2+) showed the highest ATZ degradation efficiency when compared with other treatments (unactivated S2O82â, Solar - sunlight only, S2O82â/Fe2+, Solar/S2O82â). Complete degradation of ATZ and 20% reduction in total organic carbon (TOC) content were observed after 30Â min of the treatment. The in situ generated
- ÐÐ and SO4-
- radicals were shown to be involved in ATZ oxidation using the radical scavengers methanol and tert-butyl alcohol. Furthermore, iron compounds were shown to act not only as catalysts but also as photo-sensitizers, as the introduction of ferrous ion into the reaction mixture led to an increased absorbance of the solution and expansion of the absorption spectrum into the longer wavelength spectral region.
Journal: Ecotoxicology and Environmental Safety - Volume 137, March 2017, Pages 35-41