Journal
BIORESOURCE TECHNOLOGY
Volume 249, Issue -, Pages 368-376Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.10.030
Keywords
Catalyst; Fe-impregnated sugarcane biochar; Fenton-like reaction; Orange G; Pyrolysis; Heterogeneous Fenton oxidation
Funding
- Louisiana Agricultural Experiment Station Hatch Project, Louisiana State University, Baton Rouge, LA, United States [LAB94152]
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This study was conducted to evaluate the catalytic activity of Fe-impregnated sugarcane biochar (FSB) for removing azo dye Orange G (OG) from solution under various Fenton-like oxidation conditions. The optimum molar Fe concentration for impregnation to achieve maximum catalytic activity of FSB in Fenton-like reaction with acceptable effluent Fe release was 0.25M (163.4 Fe mg/g in FSB). High removal efficiency of 99.7% was achieved within 2 h of reaction at optimum conditions of 0.075 g/L H2O2, 0.5 g/L FSB for 0.1 g/L OG at initial pH 5.5 under 25 degrees C. For every 10 degrees C increase, the time for maximum OG degradation efficiency decreased by 0.5 h. The OG removal by FSB exhibited a slow induction reaction followed by fast OG decomposition. FSB can be used successively for at least 4 runs with > 89.3% OG removal. The FSB was more economical, efficient, and recyclable than other conventional Fenton oxidation catalysts.
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