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UN Sustainable Development : Clean water and sani ... ✕
Collection [3]
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UN Sustainable Development [11]
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Subject Headings [35]
Clean water and sanitationEnsure access to water and sanitation for all and sustainable water management
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Evaluation of wheat (Triticum aestivum L.) lines for drought tolerance in Kyrgyzstan

Venera İSAYEVA

The study was carried out to explore drought stress indices in F4 hybrid generations of Triticum aestivum L. to select drought stress tolerant lines for rainfed areas of Kyrgyzstan. Wheat is the main food crop in Kyrgyzstan. There are about 0.3 million ha allotted for wheat, more than half of these sown areas (0.2 million ha) are in rainfed farming zones, where the amount of precipitation rarely exceeds 300-400 mm per year. The study was conducted in 2019 at the experimental field of Agricultural Faculty of Kyrgyz-Turkish Manas University. Eighteen hybrid lines of spring wheat and two released ...More

Article 2023 Ziraat Fakültesi Emirates Journal of Food and Agriculture35 ( 5 ) 32 Views
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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 ...More

Article 2023 Mühendislik Fakültesi Ultrasonics Sonochemistry98 43 Views
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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 ...More

Article 2023 Mühendislik Fakültesi Theoretical Foundations of Chemical Engineering57 ( 2 ) 74 Views
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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 ...More

Article 2023 Mühendislik Fakültesi Journal of Water Process Engineering56 11 Views
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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 ...More

Article 2023 Mühendislik Fakültesi Journal of the Professional Association for Cactus Development ( 25 ) 15 Views
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The efficiency of cationic-based hydrogels in heavy metal removal from wastewater

Bakıt BORKOYEV | Kalıypa SALİYEVA

The present study draws attention to arsenic (V) (As(V)), chromium (III) (Cr(III)), and chromium (VI) (Cr(VI)) heavy metal pollutants, which have negative effects on aquatic ecosystems and indirectly pose a serious threat to the health of living things in the environment. Homopolymer and copolymer hydrogels were synthesized by the UV polymerization technique using 2-acrylamido-2-methyl-1-propansulfonic acid sodium salt (AMPS) and 3-acrlylamidopropil-trimethyl ammonium chloride monomers, and a crosslinker aimed to improve the swelling properties and metal sorption of the prepared hydrogels. The ...More

Article 2023 Mühendislik Fakültesi Polymer Bulletin81 ( 8 ) 31 Views
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Electrochemical Sulfur Removal at Controlled and Uncontrolled pHs with an Iron Anode

Nurzat ŞAYKİYEVA | Mustafa DOLAZ | Zarlık MAYMEKOV | Mehmet KOBYA

In this study, sulfide removal was carried out in the Electrocoagulation process under controlled and uncontrolled pH conditions. Under optimum conditions, electrocoagulation took place in less than 40 minutes at uncontrolled pH and less than 30 minutes at controlled pH to reduce the sulfite concentration of the effluent below 0.5 mg/L. The reaction rate constant and iron-sulfide molar ratio for sulfide removal were 14.09 x 10(-2) min(-1) and 0.97 mol/mol, respectively; under uncontrolled pH conditions, they were 22.88 x 10(-2) and 0.97 mol/mol at controlled pH. The mg sulfide removed per g Fe ...More

Article 2023 Mühendislik Fakültesi Theoretical Foundations of Chemical Engineering57 ( 6 ) 6 Views
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Mining- Associated environmental problems in the Kyrgyz Republic = Геоэкологические проблемы, связанные с деятельностью горнодобывающих предприятий Кыргызской Республики

Kanatbek KOCOBAYEV | Nurzat TOTUBAYEVA

Рассмотрены актуальные геоэкологические проблемы, связанные с деятельностью горнодобывающих предприятий Кыргызской Республики. Авторами сделан вывод, что почти все горнодобывающие предприятия оказывают опасное экологическое воздействие на окружающую среду. Необходимо уделять пристальное внимание не только хвостохранилищам, но и отвалам пустых пород, так как они могут иметь громадные объемы и служить опасными источниками химического загрязнения вод в течение длительного времени после закрытия предприятий. - Ключевые слова: Кыргызская Республика, горнодобывающие предприятия, геоэкологические пр ...More

Article 2016 Mühendislik Fakültesi Горный журнал / Gornyi Zhurnal ( 8 ) 39 Views
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Kavak brown coal basin: Integrated development prospects and environmental problems = Кавакский буроугольный бассейн: перспективы комплексного использования минерального сырья и экологические проблемы освоения

Kanatbek KOCOBAYEV

Рассмотрены возможности комплексного освоения месторождений Кавакского буроугольного бассейна Кыргызской Республики. Проанализированы экологические нагрузки на окружающую природную среду при возможном строительстве ТЭС на углях Кавакского бассейна мощностью 1200 мВт и увеличении объема добычи угля до 4 млн т в год и более. - Ключевые слова: Кавакский буроугольный бассейн, водоугольное топливо, подземная газификация, высокоскоростной низкотемпературный пиролиз, разработка углей, загрязнение окружающей среды, выбросы тепловой электрической станции = Recommendations on complex and rational devel ...More

Article 2016 Mühendislik Fakültesi Горный журнал / Gornyi Zhurnal ( 8 ) 30 Views
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How does arsenic speciation (arsenite and arsenate) in groundwater affect the performance of an aerated electrocoagulation reactor and human health risk?

Mehmet KOBYA

Arsenic (As) occurrence in water resources has become one of the most critical environmental problems worldwide. The detrimental health impacts on humans have been reported due to the consumption of As-contaminated groundwater resources. Consumption of As-containing water over the long term can cause arsenicosis and chronic effects on human health due to its toxicity. Several treatment processes are available for As removals such as coagulation, ion exchange, adsorption, and membrane technologies but they have various major drawbacks. In the present work, therefore, an aerated electrocoagulati ...More

Article 2021 Mühendislik Fakültesi Science of The Total Environment808 50 Views
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Multitemporal meteorological drought forecasting using Bat-ELM

Hasan YILMAZ

The advancement of the machine learning (ML) models has demonstrated notable progress in geosciences. They can identify the underlying process or causality of natural hazards. This article introduces the development and verification procedures of a new hybrid ML model, namely Bat-ELM for predictive drought modelling. The multi-temporal standardized precipitation evapotranspiration index (SPEI-3 and SPEI-6) is computed as the meteorological drought index at two study regions (Beypazari and Nallihan), located in Ankara province, Turkey. The proposed hybrid model is obtained by integrating the Ba ...More

Article 2022 Ziraat Fakültesi Acta Geophysica70 ( 2 ) 50 Views
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The Impact of Road Salts on Groundwater and Estimation of the Chlorine Ions by Hydrogen Index

Canarbek İZAKOV | Kubat KEMELOV | Nurzat ŞAYKİYEVA | Zarlık MAYMEKOV

In this study, the influence of road salts on groundwater was investigated. The use of anti-ice reagents in winter requires certain precautions since the main chemical composition of the salts is chlorides. At the same time, the widely used sodium chloride does not form ion pairs in water, which means that it has a high migration ability and a weak sorption potential. In addition, the concentration of chloride salts in the components of the environment is so high (10-140 ppm). Therefore, the rapid assessment of the concentration of technogenic chlorine ion in water by pH is an urgent task. The ...More

Article 2022 Mühendislik Fakültesi Polish Journal of Environmental Studies31 ( 2 ) 118 Views
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