Investigation on the Removal of COD from Colored Aqueous Solutions with O3, H2O2, HCO3−, and PAC

Autor:	Cafer Çelik, Ensar Oguz, Bulent Keskinler
Rok vydání:	2015
Předmět:	Powdered activated carbon treatment Environmental Engineering Ozone Aqueous solution Inorganic chemistry Chemical oxygen demand chemistry.chemical_compound Taguchi methods chemistry Environmental Chemistry Fourier transform infrared spectroscopy Hydrogen peroxide Spectroscopy Nuclear chemistry
Zdroj:	Ozone: Science & Engineering. 37:62-70
ISSN:	1547-6545 0191-9512
DOI:	10.1080/01919512.2014.911076
Popis:	In this study, chemical oxygen demand (COD) was removed using different processes containing O3, H2O2, HCO3−, and powder activated carbon (PAC) from the synthetic dye solutions. The effects of the experimental parameters such as temperature, ozone dose, dye concentration, pH, and time on the removal of COD were investigated. The Taguchi method was applied to determine the optimum conditions. An orthogonal array L18 (21 * 37) experimental design plan was selected to define the optimum conditions. In addition, the mechanism of the COD removal was explained on the basis of the results of Fourier transform infrared (FTIR) spectroscopy. To gain information about COD removal mechanism at various pHs, electrophoretic mobilities of particles were measured. The chosen experimental parameters and their ranges are: (0–39 mM); temperature (18–70 °C); ozone dose (164–492 mg/min); dye concentration (200–600 ppm); PAC (0–1.5 g); H2O2 (0–0.056 mM); pH (3–12); and time (10–30 min). Under these optimum conditions, it was f...
Databáze:	OpenAIRE
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