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박종환,Jim J. Wang,Negar Tafti,Ronald D. Delaune 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.71 No.-
A new heterogeneous Fenton catalyst, Fe-impregnated biochar catalyst (Fe-BC) was synthesized andevaluated in detail for its catalytic activity with sulfate radical under various conditions. The optimumconditions for the removal of Eriochrome Black T (EBT) by Fe-BC were determined as 0.27 g/L K2S2O8 (PS)and 0.5 g/L Fe-BC for 0.1 g/L EBT, and which resulted 85–88% removal efficiency within 2 h. The effectiveoxidation of EBT was observed over a pH range of 2–4 and temperature of 25–45 C and maintained EBTremoval efficiency of 77.6–92.7%. Under optimum conditions, the catalytic activity was faster in the orderof PS > PS + HP > H2O2 (HP) >>Fe-BC (without oxidants). The catalytic activity of Fe-BC for EBT can beidentified in two stages, which occur rapidly within 30 min (1st stage) and followed by slow oxidationuntil 120 min (2nd stage). Catalytic activity by sulfate radical was also dominantly influenced by otherpollutant such as iodide, phosphate and humic acid. Overall, the sulfate radical generated from Fe-BC/PSwas found more economical with strong oxidation efficiency for use in Fenton-like reaction for treatingorganic pollutants compared with conventional Fenton reaction with H2O2.