Yazar "Akyol, Abdurrahman" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    The degradation of 1,4 acetaminophen by electrocatalytic oxidation process and investigation the by-products of the system
    (Elsevier, 2023) Ozturk, Dilara; Akyol, Abdurrahman; Kara, Serdar; Dimoglo, Anatoli
    The study was aimed at using Ti/IrO2-RuO2 electrocatalytic electrodes for the purpose of removing 1,4 -acetamin-ophen from a solution. The electrooxidation process's efficiency was studied by controlling various parameters such as pH (3-11), current density (100-1000 A.m-2), electrolyte type (NaCl, Na2SO4, KCl), and conductivity (1.5-10 mS.cm-1). Additionally, H2O2 addition (100-1000 mu L), and acetaminophen concentration (25-100 ppm) were also studied. In addition, it was found that when the initial concentrations were increased from 25 ppm to 100 ppm, there was a corresponding increase in the removal efficiencies, which ranged from 27% to 36% at a current density of 350 A.m-2 and a conductivity of 3.5 mS.cm-1 for a period of 90 min. The removal efficiency increased from 30% to 42% when 0.5 mL of 30% H2O2 was added to the initial concentration of 50 ppm. The presence of chlorine ions in a solution has been demonstrated to result in the formation of oxidation products. This result has enabled researchers to investigate the toxic and disinfecting properties of the solution. The LC-MS spectra analysis revealed the formation of intermediate degradation products. The identification of these me-tabolites enabled the suggestion of their structure and degradation mechanism.
  • Küçük Resim
    Öğe
    Laundry wastewater treatment by peroxi-coagulation
    (Desalination Publ, 2020) Nayir, Tulin Yilmaz; Dinc, Ozge; Kara, Serdar; Akyol, Abdurrahman; Dimoglo, Anatoli
    Peroxi-coagulation (PC) process was developed with iron anodes and carbon-polytetrafluoroethylene cathodes for the treatment of laundry wastewater (LWW). The effect of operating conditions as pH, current density and temperature were investigated by response surface modeling. Whereas temperature change did not affect the reaction, pH change dominated it especially between pH 5-7 causing an effective coagulation process. The model was devoted to maximizing the removal of chemical oxygen demand (COD), methylene blue substances (MBAS) and total phosphorus (TP) and to minimizing total residual iron (TFe) concentration in the treated wastewater. Complete TP removal and high removal efficiencies in terms of COD and MBAS were provided at optimal operation conditions (pH 7, current density 45 mA/cm(2) and temperature: 25 degrees C). During the PC process H2O2 and S2O82- production was observed. According to the results, H2O2 concentration was stable during the process after a certain increment; however, persulfate production reached maximum value when surfactant (namely: linear alkylbenzene sulfonate) concentration was almost minimum in the bulk. In the PC process, both the oxidation with possibly formed radicals (i.e. (OH)-O-center dot and SO4-center dot) and the coagulation with iron precipitation are responsible for the LWW treatment.