Journal
RSC ADVANCES
Volume 4, Issue 37, Pages 19183-19195Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra00754a
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Funding
- Council of Scientific and Industrial Research (CSIR) India
- STRAIT [CSC 0201]
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This work reports the degradation of biorefractory aqueous ortho-phenylenediamine (OPD) by hydrogen peroxide and iron(III) oxide doped nanoporous activated carbon (Fe-NPAC). The Fe-NPAC was prepared by a hydrothermal method. The catalyst was characterized using BET surface area and porosity analyzers, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The effect of pH, (1-10); catalyst dosage, (Fe-NPAC, 0.1 g, 0.2 g, 0.3 g); H2O2 concentration, (1.76 mmol, 3.52 mmol, 5.29 mmol, 7.05 mmol and 8.82 mmol) and OPD concentration on the catalytic activity was evaluated. The catalytic oxidation of OPD by H2O2-Fe-NPAC(400) was confirmed using UV-Visible and emission spectroscopy. The chemical oxygen demand (COD) was reduced by 96% within 180 min in the presence of Fe-NPAC(400), which is about 20-fold higher than the control (without Fe-NPAC(400)). Moreover, Fe-NPAC400 was demonstrated to have excellent stability and reusability characteristics.
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