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Bulunan: 32 Adet 0.000 sn
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Filtreler
Filtreler
Bulunan: 32 Adet 0.000 sn
Araştırmacılar : Mehmet KOBYA ✕
Koleksiyon [1]
Araştırmacılar [5]
BM Sürdürülebilir Kalkınma [7]
Fakültesi / Enstitütü [1]
Yayın Türü [3]
Yayımlanma Yılı [5]
Dil [2]
Kaynak [22]
Veri Tabanları [12]
İndex Türü [4]
İndex Türü 2 [1]
Yayıncı [10]
Bölümü [1]
Ulusal/Uluslararası [1]
Konu Başlıkları [35]
Prof. Dr. Mehmet KOBYAMühendislik Fakültesi
Erişime Açık

Ultrasound-assisted photocatalytic decomposition of rifadin with biochar and CNT-based NiCr layered double hydroxides

Mehmet KOBYA

Modification of layered double hydroxides (LDHs) is known to be beneficial for boosting the consistent formation of reactive oxygen species (ROSs) and enhancing the photocatalytic process. Herein, a facile synthesis method for preparing carbon nanotube (CNT) and biochar (BC)-based NiCr LDH (NC) nanocomposites as a sonophotocatalyst for the efficient degradation of rifadin (RA) was provided. The formation of thin nanosheet structures of NC along with porous and nanotube structures of BC and CNT was well approved by scanning electron microscope (SEM) and high-resolution transmission electron mic ...Daha fazlası

Makale 2023 Mühendislik Fakültesi Surfaces and Interfaces36 54 Görüntülenme
Erişime Açık

A techno-economical assessment of treatment by coagulation-flocculation with aluminum and iron-bases coagulants of landfill leachate membrane concentrates

Mehmet KOBYA

Landfill leachate treatment involved with the membrane bioreactor (MBR) combined with membrane treatment via nanofiltration (NF) and/or reverse osmosis (RO) is widely used in Turkey. This treatment produces landfill leachate membrane concentrates (LLMCs) with an undesirably high concentration of contaminants. In the study, two different nanofiltration concentrates of leachate were coagulated. Coagulant dosages from 0.10 to 5.0 g of Me3/L (Me3: Al3 or Fe3), and the pH values ranged from 4.0 to 8.0 and 3.0-9.0 for Al-based and Fe-based coagulants, respectively. The most efficient pH values were ...Daha fazlası

Makale 2023 Mühendislik Fakültesi Chemosphere314 75 Görüntülenme
Erişime Açık

Perfluorooctanoic acid (PFOA) removal from real landfill leachate wastewater and simulated soil leachate by electrochemical oxidation process

Mehmet KOBYA

Poly and perfluoroalkyl compounds (PFASs) are a group of chemicals that are widely used and are difficult to purify. Within this group, perfluorooctanoic acid (PFOA), known for its highly polar and strong carbon-fluorine bonds, is a frequently encountered species in surface water, drinking water, and groundwater. In this study, we investigated the efficiency of electrooxidation (EO) in PFOA removal, optimization of EO parameters, and groundwater simulation in a realistic scenario. The EO optimization experiments were performed with a boron-doped diamond (BDD) anode for different values of pH, ...Daha fazlası

Makale 2022 Mühendislik Fakültesi Environmental Technology & Innovation28 46 Görüntülenme
Erişime Açık

Arsenic Removal by Electrocoagulation

Mehmet KOBYA

Because of the toxic impacts on human health, the arsenic (As) limit value in drinking water was decreased from 50 to 10 μg l −1 by the relevant authorities (WHO 1993; US EPA 2001). In this case, the problem of As pollution in natural water resources used for drinking water has grown even more and turned into a global crisis. According to reports in many parts of the world, over about 230 million people appear to be affected by high arsenic concentrations in groundwater. In this case, it turned out that there was a great need for cost-effective and environmentally friendly technologies from dr ...Daha fazlası

Kitap Bölümü 2022 Mühendislik Fakültesi Arsenic in Plants: Uptake, Consequences and Remediation Techniques 13 Görüntülenme
Erişime Açık

Synergistic effect of Fe and Co metals for the enhanced activation of hydrogen peroxide in the heterogeneous electro-Fenton process by Co-doped ZnFe layered double hydroxide

Mehmet KOBYA

Heterogeneous electro-Fenton (EF) is a powerful technology for the removal of emerging organic pollutants from wastewater. However, the development of catalysts with high activity towards the production of •OH by decomposing H2O2 remains a challenge. Herein, Co-doped ZnFe LDH as a heterogeneous catalyst with 2D plate-like morphology was produced by a co-precipitation method. Co-doping increased the pore volume of ZnFe LDH from 0.188 cm3/g to 0.2711 cm3/g and pore diameter from 5.305 nm and 9.39 nm. EF process consisted of a hydrothermally activated graphite felt cathode and a platinum plate an ...Daha fazlası

Makale 2022 Mühendislik Fakültesi Journal of Environmental Chemical Engineering10 ( 6 ) 68 Görüntülenme
Erişime Açık

Identifying Geogenic and Anthropogenic Aluminum Pollution on Different Spatial Distributions and Removal of Natural Waters and Soil in Canakkale, Turkey

Mehmet KOBYA

The Çanakkale–Kirazlı region (Turkey) is enriched with minerals, especially aluminum (Al), which dangerously get transported into aquatic media due to several mining and geological activities in recent years. In this study, Al and other potentially toxic metals (PTMs) including B, Ba, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Si, and Zn, in both water and soil samples, were measured for quality determination. Selected metals were also analyzed by the enrichment factor (EF), the geoaccumulation index (Igeo), the contamination factor (CF), and the pollution load index (PLI) to evaluate both water and soil ...Daha fazlası

Makale 2023 Mühendislik Fakültesi ACS Omega8 ( 9 ) 39 Görüntülenme
Erişime Açık

Tuned CuCr layered double hydroxide/carbon-based nanocomposites inducing sonophotocatalytic degradation of dimethyl phthalate

Mehmet KOBYA

This study is the first to explore the possibility of utilizing CuCr LDH decorated on reduced graphene oxide (rGO) and graphene oxide (GO) as sonophotocatalysts for the degradation of dimethyl phthalate (DMP). CuCr LDH and its nanocomposites were successfully fabricated and characterized. Scanning electron microscopy (SEM) along with high-resolution transmission electron microscope (HRTEM) both evidenced the formation of randomly oriented nanosheet structures of CuCr LDH coupled with thin and folded sheets of GO and rGO. The impact of diverse processes on the degradation efficiency of DMP in t ...Daha fazlası

Makale 2023 Mühendislik Fakültesi Ultrasonics Sonochemistry95 67 Görüntülenme
Erişime Açık

Концентрационное распределение молекул и частиц в модельной системе: Fe–NaCl–Na2S–H2SO4–H2O при различных температурах процесса электрокоагуляции

Zarlık MAYMEKOV | Canarbek İZAKOV | Nurzat ŞAYKİYEVA | Mustafa DOLAZ | Mehmet KOBYA

В практических условиях одним из возможных решений проблемы очистки сероводородсодержащих промышленных сточных вод является электрохимическое окисление сульфидов. С учетом этих обстоятельств, в работе рассмотрена модельная система Fe–NaCl–Na2S–H2SO4–H2O, собрана экспериментальная установка и изучен процесс электрокоагуляции в широких пределах изменения температуры (288–308 К) водного раствора сероводорода. Выявлены оптимальные соотношения исходных компонентов в системе. Определены экспериментальные и расчетные водородные показатели раствора (pH). Осуществлено термодинамическое моделирование си ...Daha fazlası

Makale 2023 Mühendislik Fakültesi Теоретические основы химической технологии57 ( 2 ) 108 Görüntülenme
Erişime Açık

Carbonaceous CoCr LDH nanocomposite as a light-responsive sonocatalyst for treatment of a plasticizer-containing water

Mehmet KOBYA

The carbonous-based nanocomposites of CoCr layered double hydroxide (LDH) with graphene oxide (GO) and reduced graphene oxide (rGO) were prepared. The successful synthesis of the CoCr LDH in hydrotalcite crystalline structure was deduced from the pattern obtained from X-ray diffraction, and the chemical composition of its surface was checked by X-ray photoelectron spectroscopy. The prosperous decorating of LDH on the sheets of rGO and GO was authenticated by the energy dispersive X-ray spectroscopy analysis and micrographs of scanning electron and transmission electron microscopy. The photo-as ...Daha fazlası

Makale 2023 Mühendislik Fakültesi Ultrasonics Sonochemistry98 43 Görüntülenme
Erişime Açık

Concentration Distribution of Molecules and Other Species in the Model System Fe-NaCl-Na2S-H2SO4-H2O at Various Temperatures of the Electrocoagulation Process

Zarlık MAYMEKOV | Canarbek İZAKOV | Nurzat ŞAYKİYEVA | Mustafa DOLAZ | Mehmet KOBYA

Under practical conditions, one of the possible solutions to the problem of treatment of hydrogen-sulfide-containing industrial wastewater is the electrochemical oxidation of sulfides. In this work, the model system Fe-NaCl-Na2S-H2SO4-H2O is considered, an experimental setup is constructed, and the electrocoagulation process is studied in a wide (288-308 K) range of temperatures of an aqueous solution of hydrogen sulfide. The optimal ratios between the initial components in the system are determined. The experimental and calculated pH of the solution are found. The system is thermodynamically ...Daha fazlası

Makale 2023 Mühendislik Fakültesi Theoretical Foundations of Chemical Engineering57 ( 2 ) 74 Görüntülenme
Erişime Açık

Electrochemical oxidation of perfluorooctanesulfonate (PFOS) from simulated soil leachate and landfill leachate concentrate

Mehmet KOBYA

The near-widespread presence of poly- and perfluoroalkyl substances (PFASs) in humans has generated concerns regarding the potential negative impact of these chemicals on human health, as some PFASs are exceedingly persistent and bioaccumulative. Among the perfluorinated PFASs, which exhibit high polarity and strong carbon–fluorine bonds, perfluorooctanesulfonate (PFOS) is one of the frequently encountered species. In this study, the efficiency of electrooxidation (EO) and its application in groundwater simulation were first evaluated as a realistic approach to PFOS removal. After optimizing E ...Daha fazlası

Makale 2023 Mühendislik Fakültesi Journal of Water Process Engineering56 11 Görüntülenme
Erişime Açık

Treatment of wastewaters from food Aromsa and ingredients production by electrocoagulation (EC) treatment aided by mucilage of Opuntia ficus-indica

Mehmet KOBYA

The electrocoagulation (EC) treatment process was aided by the cladode mucilage of Opuntia ficus-indica (OFI) to improve chemical oxygen demand (COD) removal efficiency () of wastewater from a plant producing flavoring and food additives. The studied variables included initial pH, current density, types of electrodes (Fe and Al), mucilage concentration, and charge loading. The EC treatment using Al electrodes, assisted by an optimum concentration of 200 mg L-1 OFI mucilage, a current density of 60 A/m2, and an initial pH equal to 3, improved the COD removal efficiency (69.77) at an EC treatmen ...Daha fazlası

Makale 2023 Mühendislik Fakültesi Journal of the Professional Association for Cactus Development ( 25 ) 15 Görüntülenme
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