Browsing by Author "Değermenci, G.D."

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    TRDizin
    ELECTROCHEMICAL HYDROGEN PEROXIDE GENERATION AND REMOVAL OF MOXIFLOXACIN BY ELECTRO-FENTON PROCESS
    (2024) Değermenci, G.D.; Değermenci, N.
    In this study, the removal of moxifloxacin, an antibiotic of the fluoroquinolone group, from aqueous solutions was investigated using the electro-Fenton process. As the efficiency of the electro-Fenton process is highly dependent on the amount of H2O2 produced during process, the formation of H2O2 under acidic conditions was also investigated. In this context, the effects of applied current, cathode type and O2 flow rate on H2O2 production were investigated using boron-doped diamond anode. The highest H2O2 production was achieved using the boron-doped diamond anode and the graphite felt cathode. In addition, the optimum conditions for the applied current and oxygen flow rate for H2O2 production were determined to be 0.25 A and 0.1 L min−1, respectively. The effects of applied current and Fe2+ concentration in the electro-Fenton process on the removal of moxifloxacin were investigated. It was found that the moxifloxacin removal rate increased with increasing applied current. The highest H2O2 accumulation was observed at 0.25 A applied current, and moxifloxacin removal also reached 93.6% after 60 min. The moxifloxacin removal rate reached the highest value at Fe2+ concentration of 0.01 mM. This study provides promising results for the efficient treatment of moxifloxacin-containing wastewater by the electro-Fenton process without the addition of H2O2 using boron-doped diamond anode anode and graphite felt cathode.
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    Pubmed
    Environmental effects of acid mine drainage and rehabilitation options at closed mine site: a case study
    (2024) Konanç, M.U.; Değermenci, G.D.
    Irregular waste storage at closed mine sites poses severe environmental problems. This study evaluates the concentrations and effects of trace elements released into the environment by mining activity by analyzing soil, water, and sediment samples taken from a copper mining site. According to the data, acidic mine drainage was the main cause of the high concentrations of trace elements in the soil and sediments, including arsenic (As), cadmium (Cd), lead (Pb), and copper (Cu). The concentrations of As, Cd, Pb, and Cu in soil and sediments were 2734-times, 1189-times, 157-times and 32 times higher, respectively, in comparison to the background values of averaged concentrations of these elements in the upper crust. Geological and statistical studies indicate that the primary constituents of these pollutants are chalcopyrite and pyrite derivatives present in the primary rock structure. Using water analysis data from 2011 to 2020, the release of essential trace element into water was investigated to monitor the environmental effects of acidic mine drainage (AMD) from the closed Kuvarshan copper mine in the Artvin region of Turkey. This study demonstrates that trace elements concentrations may change according to local and seasonal factors and highlights the importance of conducting routine environmental monitoring studies.