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Efficient degradation of phenol using natural clay as heterogeneous Fenton-like catalyst
Abstract:
A natural containing Fe-clay (NRC) was used for the Fenton-like oxidation of phenol. This new catalyst was very efficient in phenol elimination in aqueous medium under mild experimental conditions (20 °C, atmospheric pressure and low concentration of hydrogen peroxide). The influence of different parameters like calcination's temperature, particle size, initial phenol and H2O2 concentrations were examined considering both phenol conversion and total organic carbon (TOC) removal. NRC was characterized by several complementary methods including chemical analysis, X-ray diffraction (XRD), Mössbauer spectroscopy, thermogravimetry-differential thermal analysis (TG-DTA), temperature programmed reduction (TPR) and BET. The experimental results showed that 100 % phenol conversion and 70 % TOC removal can be achieved using sieved and calcined NRC (d < 50 μm/450 °C). Catalytic activity of NRC was mainly attributed to the amount of iron oxide species (12.15 wt.%) present naturally in the clay.
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