In situ generation of hydroxyl radical by cobalt oxide supported porous carbon enhance removal of refractory organics in tannery dyeing wastewater

Journal of Colloid and Interface Science
S KarthikeyanG Sekaran

Abstract

In this study, cobalt oxide doped nanoporous activated carbon (Co-NPAC) was synthesized and used as a heterogeneous catalyst for the Fenton oxidation of organic dye chemicals used in tannery process. The nanoporous activated carbon (NPAC) was prepared from rice husk by precarbonization followed by chemical activation at elevated temperature (600 °C). The cobalt oxide was impregnated onto NPAC and characterized for UV-visible, Fluorescence spectroscopy, FT-IR, HR-TEM, XRD, BET surface area and XPS analyses. The hydroxyl radical generation potential of Co-NPAC from hydrogen peroxide decomposition was identified (λ(exi), 320 nm; λ(emi), 450 nm) by Excitation Emission Spectra (EES) analysis. The conditions for the degradation of tannery dyeing wastewater such as, Co-NPAC dose, concentration of H2O2, and temperature were optimized in heterogeneous Fenton oxidation process and the maximum percentage of COD removal was found to be 77%. The treatment of dyes in wastewater was confirmed through UV-Visible spectra, EES and FT-IR spectra analyses.

References

Oct 1, 2014·Physical Chemistry Chemical Physics : PCCP·V L ChandrabossS Senthilvelan

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Citations

Jul 28, 2016·The Science of the Total Environment·Parmila DeviAjay K Dalai
Jul 8, 2019·Environmental Science and Pollution Research International·Changqing Zhao, Wuyong Chen
May 10, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Xiaoyan LiWang Yuan
Apr 4, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Suguna PerumalYong Rok Lee
Jun 11, 2021·Journal of Environmental Management·Éverton HansenMariliz Gutterres
Jun 26, 2020·Inorganic Chemistry·Basudev Baral, Kulamani Parida

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