Use of Fenton oxidation to improve the biodegradability of a pharmaceutical wastewater

Tekin, Huseyin
Ataberk, Selale S.
Balta, Tolga H.
Ceribasi, I. Haluk
Sanin, Faika Dilek
Dilek, Filiz Bengü
Yetiş, Ülkü
The applicability of Fenton's oxidation to improve the biodegradability of a pharmaceutical wastewater to be treated biologically was investigated. The wastewater was originated from a factory producing a variety of pharmaceutical chemicals. Treatability studies were conducted under laboratory conditions with all chemicals (having COD varying from 900 to 7000 mg/L) produced in the factory in order to determine the operational conditions to utilize in the full-scale treatment plant. Optimum pH was determined as 3.5 and 7.0 for the first (oxidation) and second stage (coagulation) of the Fenton process, respectively. For all chemicals, COD removal efficiency was highest when the molar ratio of H2O2/Fe2+ was 150-250. At H2O2/Fe2+ ratio of 155, 0.3 M H2O2 and 0.002 M Fe2+, provided 45-65% COD removal.


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The effectiveness of the Fenton's reagent (H2O2/Fe2+) in the treatment of carpet dyeing wastewater was investigated under different operational conditions, namely, H2O2 and FeSO4 concentrations, initial pH and temperature. Up to 95% COD removal efficiency was attained using 5.5 g/l FeSO4 and 385 g/l H2O2 at a pH of 3, temperature of 50 degrees C. The H2O2/Fe2+ ratio (g/g) was found to be between 95 and 290 for maximum CO removal. It was noteworthy that, keeping H2O2/Fe2+ ratio constant within the range of 9...
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An Al2O3 sample obtained from Seydisehir Eti Aluminyum A.S was treated and characterized for its potential use as a catalyst support. Atomic absorption spectroscopy and flame photometry characterization revealed the presence of 95.52% Al2O3 , 4.44% Na2O, and 0.043% Fe2O3 in the original sample. Both gamma-Al2O3 and alpha-Al2O3 phases were identified in the crystalline structure by X-ray diffraction analysis. However, alpha-Al2O3 was found to be the phase in abundance. The BET surface area of the original sa...
Citation Formats
H. Tekin et al., “Use of Fenton oxidation to improve the biodegradability of a pharmaceutical wastewater,” JOURNAL OF HAZARDOUS MATERIALS, pp. 258–265, 2006, Accessed: 00, 2020. [Online]. Available: