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.


Importance of H2O2/Fe2+ ratio in Fenton's treatment of a carpet dyeing wastewater
Gulkaya, Ipek; Surucu, Gulerman A.; Dilek, Filiz Bengü (2006-08-25)
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...
Removal of Pesticides from Wastewater by Membrane Proces
Ateş, Nuray; Uzal, Niğmet; Yetiş, Ülkü; Dilek, Filiz Bengü (2021-06-23)
Purpose: The aim of this study was to investigate the removal performances of four pesticides (tributyl phosphate, flutriafol, dicofol and irgarol) by RO membranes. Methods: Three different RO membranes (BW30-LE, SW30-XLE and GE-AD) were used to reject pesticides in two transmembrane pressures of 10 and 20 bar in bench-scale membrane filtration cell. Tributyl phosphate and flutriafol were detected by GC/MS and dicofol and irgarol were monitored by HLPC instruments. Results: While the highest removal of trib...
Preparation and characterization of cyclodextrin nanosponges for organic toxic molecule removal
VARAN, CEM; Anceschi, Anastasia; Sevli, Serhat; Bruni, Natascia; Giraudo, Leonardo; BİLGİÇ, ELİF; KORKUSUZ, PETEK; Iskit, Alper B.; Trotta, Francesco; BİLENSOY, EREM (Elsevier BV, 2020-07-01)
Cyclodextrin-based nanosponges (CD-NS) are considered as safe and biocompatible systems for removing toxic molecules from the body. Rapid removal of toxic molecules that are formed in the body from certain food constituents, is relevant especially for patients affected by chronic kidney disease. Within the scope of this study, innovative cyclodextrin polymers were synthesized to form nanosponges able to remove indole, before it could form the toxic indoxyl sulfate in the body. Furthermore, in vivo studies w...
Use of Seydisehir alumina as a support for Co oxidation catalysts
Mbaraka, I; Üner, Deniz (2003-05-01)
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...
Effects of aromatic diboronic acid on thermal charateristics of polybenzoxazines based on phenol and aniline
Telli, Aysegul Hisar; Hacaloğlu, Jale (2018-11-01)
In this work, polybenzoxazines based on phenol and aniline were prepared by curing as-synthesized and purified monomers in the presence of aromatic diboronic acid, BDBA. Condensation reactions between BOH groups of diboronic acid and phenolic OH groups of benzoxazine took place during curing only when unreacted phenol, or low mass oligomers were present in the medium. Generation of fragments involving B-O-C groups and significant improvement in thermal characteristics were detected upon curing the as-synthe...
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: