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    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.
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    Influence of the Electrocatalytic Anode Nature on Dye Destruction
    (Wiley-V C H Verlag Gmbh, 2023) Dimoglo, Anatoli; Utlu, Birkan; Ozturk, Dilara; Gokmen-Erdogan, Kubra
    In order to extract a highly concentrated dye from textile industry wastewater, an electrocatalytic oxidation method based on Ru/Ir/Ti, RuO2/IrO2/TiO2 electrodes and high-density graphite was used. Optimization of the oxidation process was controlled by varying such parameters as current density, pH, concentration of supporting electrolyte (NaCl), wastewater treatment time. The maximum dye removal from wastewater is achieved at pH 7.1, current density 70 mA cm-2, NaCl concentration 3 g/L, and treatment time 15 minutes. Among the investigated electrodes, the Ru/Ir/Ti anode and titanium-based oxides of these metals proved to be the most effective. The percentage of color removal for all anodes increases with increasing current density and duration of solution treatment. For a graphite electrode, at a current density of 70 mA cm-2 and a treatment time of 10 minutes, a maximum dye removal of 90 % is achieved. The percentage of color removal for Ru/Ir/Ti and RuO2/IrO2/TiO2 electrodes is higher than for graphite and amounted to 98 % and 92 %, respectively. The results of the electronic structure of the dye made it possible to shed light on the nature of the electronic spectra and the possible mechanism of the electrocatalytic act. Consideration of the dependence of color removal, COD and TOC on such parameters as current density, water treatment time in the reactor showed that the efficiency of the wastewater treatment process increases in the series: graphite