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, ...Более

Effects of botanical gardens on student environmental perception

Hasan YILMAZ

This paper examines the role of the classroom environment in promoting student well-being and, more specif-ically, a sense of responsibility towards nature in the city. The study analyzed how indoor vs outdoor educational environments affect students' perception of events and phenomena focusing on emotional, behavioral and cognitive processes. It was conducted in the Kayakyolu Secondary School, Erzurum, Turkey with 282 students ranging in age from 11 to 14 in grades 5-8. They participated in reading a story in two distinct environments: an enclosed indoor classroom and an outdoor botanical gar ...Более

AMINO ACID COMPOSITION AND SOME PHYSICOCHEMICAL PARAMETERS OF MULTI-FLORAL HONEY FROM MOUNTAINOUS REGIONS OF KYRGYZSTAN = Kırgızistan'ın Dağlık Bölgelerinden Elde Edilen Polifloralı (Çok Çiçekli) Balın Amino Asit Bileşimi ve Bazı Fizikokimyasal Parametreleri

Ayçürök MACİTOVA

Mountain animal food products are at the center of attention due to their intrinsic value and, as such, mountain beekeeping products deserve attention and effort for their valorisation. The work aimed at investigating the quality traits of mountain honey samples from Kyrgyzstan, giving particular emphasis on the amino acid profiles and their possible relationship with the other chemical-physical characteristics. The moisture content, acidity, pH, and diastase activity of honey samples were within the limits established by normative documents. The honey samples showed a higher diastase activity ...Более

World Nomad Games As An Emerging Large-Scale Event and Its Role for Tourism Development in Kyrgyzstan

Azamat MAKSUDUNOV | Kıyalbek DIYKANOV

The World Nomad Games (WNG) is a new emerging large-scale event in the world, where ethnic sports can be exhibited. It was started in 2014 and until today WNG has been organized three times (2014, 2016, and 2018) in Kyrgyz Republic. Actually, these kinds of events have economic and noneconomic impacts on the destinations. In this chapter, the WNG role for tourism development in Kyrgyz Republic will be investigated. Kyrgyz Republic as a tourism destination was opened in 1991 after the collapse of the USSR. Today, tourism is identified among the priority sectors in the country. However, our coun ...Более

Technological intelligence for circular supply chain: a co-citation analysis approach

Serhat BURMAOĞLU

Purpose The COVID-19 pandemic has disrupted the supply chains, and this brought researchers and practitioners to think about more on circular supply chains (CSC). The CSC concept has been discussed in the literature more than a decade. This study aims to find out the theoretical roots of CSC by analyzing scholarly articles in literature. Design/methodology/approach This paper uses document cocitation analysis for reaching this aim. After retrieving data from Web of Science database, this paper explores data set by considering used references of these publications and clusters them based on the ...Более

Selective separation of gallium from various ions by polymer inclusion membranes based on CTA/PVC blend using TOPO as carrier

Osman TUTKUN | Kurmancan KAPAROVA

Selective transport of gallium from HCl media containing other ions such as Zn, Co, and Ni, by polymer inclusion membranes (PIM), based on CTA/PVC blend using trioctylphosphine oxide (TOPO) as carrier and 2-nitrophenylpentyl ether (2-NPPE) as plasticizer is studied. The effect of various parameters such as the HCl concenration in the feed, HCl concenration in the stripping phase, carrier (TOPO) concentration, 2-NPPE concentration, the cellulose triacetate (CTA)/poly(vinyl chloride) (PVC) as the polymer-blend was experimentally studied and the optimum conditions were determined. It was possible ...Более

Future research avenues at the nexus of circular economy and digitalization

Serhat BURMAOĞLU

Purpose The authors posit that one of the key enablers of the circular economy will be the digital transformation - in other words, digitalization. In this study, the authors examine and visualize the interaction of the circular economy and digitalization by using scientific publications. They explore possible synergies and future research avenues at this junction. Design/methodology/approach The authors first apply bibliometrics to explore and visualize the relationships between the circular economy and digitalization in the academic literature. Following the clustering of topics, they define ...Более

Synthesis and characterization of carboxymethyl cellulose (CMC) from different waste sources containing cellulose and investigation of its use in the construction industry

Mustafa DOLAZ

This study aimed at the recovery of cellulose from abundantly available wastes and its sustainable application. Firstly, in the cleaning process, cellulose-containing wastes, such as air particle vacuum powder (APVD), towel clippings (TC), and cottonseed delintation residues (CD), were thoroughly washed, separately, with tap water to remove some organic and inorganic impurities. The cotton slurry was purified by 17.5 NaOH at 90 degrees C for about 4 hours, then filtered and washed with tap water. Afterwards, the resulting pulp was bleached by NaOH and H2O2 , and washed with distilled water unt ...Более

Investigation on properties of cement mortar with bottom ash and perlite

Kasım BAYNAL

Perlite and some recycled materials are preferably used to provide thermal insulation and lightness in mortar. Cement is often used as a binder in such a composite, although it makes the composite heavier and impairs its insulation properties. In this study, recycled bottom ash (BA) and expanded perlite (EP) as the aggregate, and cement as the binder and the optimum solution were investigated by using Taguchi Method. Depending on the specimens prepared using orthogonal array L9, the values of compressive strength, flexural strength, flowability, dry unit weight, water absorption, capillarity c ...Более

Fuzzy Applications in Custom Clothing Design Technology Based on Intelligent 3D Simulation Technology

This article integrates intelligent 3D simulation technology with an online customized clothing system to increase the impact of customized clothing design. The user uses a 3D scanner to scan his own body and acquire 3D body data, which include information of the head, chest, upper limbs, lower limbs, hands, and feet. Furthermore, this work enhances intelligent tracking and recognition technology, enhances the impact of human body parameter collection, and combines the enhanced algorithm to create a personalised clothing design system based on intelligent 3D simulation technology. Through expe ...Более

LABORATORY SCALE PRODUCTION OF HYDROXYPROPYLMETHYLCELLULOSE (HPMC) IN A GAS-TIGHT REACTOR UNDER PRESSURE AND ITS APPLICATION IN CEMENT PASTE

Mustafa DOLAZ

Unfortunately, cellulose, which is the most abundant of natural polysaccharides in the world, and is found in high amounts in cotton and the waste/by-products of textile factories, cannot be recycled sufficiently. As an attempt to find a solution to this problem, in this study, a by-product of the towel production process, called towel clippings (TC), was used as a source of cellulose for obtaining HPMC. HPMC was synthesized for the first time from the reaction of cellulose, propylene oxide (PO) and chloromethane (CM) under pressure in a gas-tight laboratory scale reactor and then evaluated as ...Более

О возможностях использования мяса яка как перспективного профилактического продукта при дефиците йода и железа

Nurudin KIDIRALİYEV

Йод является важнейшим незаменимым микронутриентом. К районам с природным дефицитом йода в воде и почве относится практически вся территория Кыргызстана. Дефицит йода проявляется широким спектром различных патологических состояний. Наиболее неблагоприятные последствия от недостатка йода возникают на ранних этапах развития организма. Из-за снижения метаболической активности йододефициту часто сопутствует железодефицитная анемия - болезнь, связанная с недостаточностью железа в крови. В этом случае анемия обычно носит невыраженный характер и, как правило, проявляется уже в зрелой стадии гипотирео ...Более