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Найденный: 26 Экземпляр 0.001 sn
Год публикации : 2021 ✕Кафедра : Çevre Mühendisliği B ... ✕
Коллекция [1]
Ученые [10]
Устойчивое развитие ООН [8]
Факультет / Институт [1]
Вид публикации [3]
Год публикации [1]
Язык [2]
Источник [18]
Базы данных [13]
Вид индекса [5]
Вид индекса 2 [1]
Издатель [11]
Кафедра [1]
Национальный/Международный [2]
Тематический рубрикатор [35]
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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 ...Более

Статья 2021 Mühendislik Fakültesi Science of The Total Environment808 50 Просмотры
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Environmental pollution size of the Bishkek Solid Waste Landfill and treatment of generated leachate wastewater

Nurzat ŞAYKİYEVA

The disposal of municipal solid wastes (MSW) is one of the important issues today. The MSW is generally disposed of in a landfill. The disintegration of wastes in landfill generates the wastewater known as leachate and it became one of the budding environmental impacts. The landfill leachate seeps into natural ponds next to the Bishkek (Kyrgyzstan) landfill. The MSWs are dumped with an irregular landfill in Bishkek, and it has been observed that this situation creates many environmental pollution problems (air pollution due to the combustion of wastes and generated biogas, due to leakage of le ...Более

Статья 2021 Mühendislik Fakültesi MANAS Journal of Engineering (MJEN)9 ( 2 ) 103 Просмотры
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Study on antimony cake as a technogenic raw material for the production of antimony oxides

Zarlık MAYMEKOV

In the process of hydrometallurgical and pyrometallurgical production of antimony at the Kadamzhai antimony plant of the Kyrgyz Republic, large-tonnage waste was generated: tailing sand, matte, slag, off-balance ore, cakes, furnace fragments, and electrolytes in salt warehouses. The waste cake is poorly studied; accordingly, the elemental and phase compositions of antimony cake have not been established. In this regard, it was noted that antimony in the cake occurs in the form of calcium antimonate and antimony hydroxide. The content of antimony in the mine tailings cakes is from 3.53 to 4.4%, ...Более

Статья 2021 Mühendislik Fakültesi MANAS Journal of Engineering (MJEN)9 ( 2 ) 89 Просмотры
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Optimisation of preparation of hazelnut shell activated carbon for adsorption of Cr (III)

Mehmet KOBYA

The aim of this study was the optimisation of the activated carbon (C) production process by dehydration-carbonisation using concentrated sulfuric acid (H2SO4) from hazelnut shells found locally and readily available agricultural waste and the adsorption of chromium (III) (Cr3) on the activated carbon produced by this method. An adsorption experiment was carried out at conditions of 25 degrees C and initial concentration of 30 mg chromium (III)/l. The optimum process conditions for ensuring maximum adsorption capacity were investigated by means of statistically designed experiments and steepes ...Более

Статья 2021 Mühendislik Fakültesi Journal of Environmental Engineering and Science17 ( 2 ) 49 Просмотры
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Graphene-based ZnCr layered double hydroxide nanocomposites as bactericidal agents with high sonophotocatalytic performances for degradation of rifampicin

Mehmet KOBYA

Herein, ZnCr layered double hydroxide (ZnCr LDH), and its nanocomposites with GO and rGO were synthesized using the co-precipitation method. The samples were characterized using XRD, FT-IR, SEM, TEM, BET, and XPS techniques. The sonophotocatalytic activity of the ZnCr LDH, ZnCr LDH/GO, and ZnCr LDH/rGO was investigated via the degradation of rifampicin (RIF) in the ultrasonic bath under visible light irradiation. The synergy index of more than 1 determined for ZnCr LDH/rGO indicated the positive interaction of sonocatalysis and photocatalysis resulted by hybridizing the LDH nanosheets with rGO ...Более

Статья 2021 Mühendislik Fakültesi Chemosphere286 ( 2 ) 95 Просмотры
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Arsenic removal from groundwater using an aerated electrocoagulation reactor with 3D Al electrodes in the presence of anions

Mehmet KOBYA

Co-occurrence of arsenic and anions in groundwater causes a severe health problems and combine effects of these pollutants significantly affect performance of treatment process. Thus, this study has been conducted to examine the combine effects of anions on arsenic removal using aerated electrocoagulation (EC) reactor with 3D Al electrodes in groundwater. A 3-level, six factors Box-Behnken experimental design (BBD) was applied to investigate the individual and combine effect of anions and operating time: phosphate (x(1): 1-10 mg L-1), silica (x(2): 20-80 mg L-1), bicarbonate (x(3): 130-670 mg ...Более

Статья 2021 Mühendislik Fakültesi Chemosphere263 86 Просмотры
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A review on treatment of membrane concentrates generated from landfill leachate treatment processes

Mehmet KOBYA

Landfill leachate (LL) is highly toxic wastewater and comprises various pollutants such as organic compounds, biological organisms, xenobiotics, heavy metals, inorganic salts, and ammonia. The integration of conventional methods with membrane processes has become indispensable due to the enforcement of stricter regulations for the LL discharge. The integrated membrane technologies achieve a pollutant removal efficiency of higher than 95?ith a large volume of treated leachate and a low capital cost investment. However, the drawback of these processes is the production of a membrane concentrate ...Более

Обзор 2021 Mühendislik Fakültesi Separation and Purification Technology259 107 Просмотры
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Toxicity of Zn-Fe Layered Double Hydroxide to Different Organisms in the Aquatic Environment

Mehmet KOBYA

The application of layered double hydroxide (LDH) nanomaterials as catalysts has attracted great interest due to their unique structural features. It also triggered the need to study their fate and behavior in the aquatic environment. In the present study, Zn-Fe nanolayered double hydroxides (Zn-Fe LDHs) were synthesized using a co-precipitation method and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and nitrogen adsorption-desorption analyses. The toxicity of the home-made Zn-Fe LDHs catalyst was examined by emp ...Более

Статья 2021 Mühendislik Fakültesi Molecules26 ( 2 ) 65 Просмотры
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Synthesis and Characterization of Hydroxypropyl Acorn Starch (HPAS) From Oak Acorn

Mustafa DOLAZ

The utilization of forest auxiliary products and their conversion into products with higher added value is important for the use of renewable resources. For this purpose, acorns belonging to the Q. coccifera species were collected in November, which is their ripening period, and dried and ground in the laboratory. Then, acorn starch (AS) was isolated from the sieved acorn flour. For 5 g of this isolated AS, hydroxypropyl acorn starch (HPAS) with the highest molar substitution (MS = 0.319) was synthesized by optimizing at 45 degrees C for 5 h with 30 g of propylene oxide and 1.88 g of NaOH. The ...Более

Статья 2021 Mühendislik Fakültesi Journal of Polymers and the Environment29 ( 7 ) 126 Просмотры
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Valorization of Chicken Feather Waste: Fabrication of Keratin-Chitosan Biofilms

Mustafa DOLAZ

According to scientists, keratin is one of the most abundant fibrous materials in nature after cellulose and chitin in the world. Several nature fibrous materials have a wide range of application starting from biomedical application to the construction sector, and especially the textile sector. The uses of natural fibers in these sectors are economical for increasing their specific properties, such as antibacterial properties, flexibility, tensile strength, shear strength, toughness, etc. This paper presented a new type of keratin-chitosan biofilms with the separation of keratin from waste chi ...Более

Статья 2021 Mühendislik Fakültesi ChemistrySelect6 ( 9 ) 66 Просмотры
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Toxicity evaluation of bulk and nanosheet MoS2 catalysts using battery bioassays

Mehmet KOBYA

Herein, the main aim is to study the influence of the materials

Статья 2021 Mühendislik Fakültesi Chemosphere268 102 Просмотры
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Антропогенные прогнозируемые геоопасности и геориски в современных условиях Казахстана и Средней Азии

Kanatbek KOCOBAYEV

Исследовано влияние подземного стока на формирование и распространение геоопасных явлений в горных, предгорных и равнинных районах постсоветской территории Центральной Азии. Особое внимание уделено формированию геоопасных и чрезвычайных явлений, связанных с антропогенным воздействием. На основании исследования известных чрезвычайных явлений в Центральной Азии подготовлены классификационные схемы и таблицы, позволяющие оценивать произошедшие и прогнозировать возможные будущие явления. Серьезное внимание уделено наиболее опасным человеческим вмешательствам - неконтролируемому отбору нефти и газа ...Более

Статья 2021 Mühendislik Fakültesi Геология и охрана недр78 ( 1 ) 98 Просмотры
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