Yazarlar
- Duran, Celal(26)
- Ozdes, Duygu(21)
- Baltaci, Cemalettin(10)
- Gundogdu, Ali(10)
- Gül, Abdulkadir(9)
- Çullu, Mustafa(8)
- Aksüt, Yavuz Selim(7)
- Baltacı, Cemalettin(7)
- Barut, Abdulkadir(7)
- Bozbeyoglu, Pinar(7)
- Erol, Ismail(7)
- Ozeken, Sengul Tugba(7)
- Peker, Iskender(7)
- Eker, Hasan(6)
- Külekçi, Gökhan(6)
- Altuner, Elif Esra(5)
- Ar, Ilker Murat(5)
- Güzel, Melih(5)
- Karahan, Selim(5)
- Karpuz, Ömer(5)
- Kıranşan, Murat(5)
- Odabaş, Halil İbrahim(5)
- Seferoğlu, Mehmet Tevfik(5)
- Uysal, Turan(5)
- Demir Şahin, Demet(4)
- Imamoglu, Mustafa(4)
- Karpuz, Omer(4)
- Top, Yener(4)
- Akar, Bülent(3)
- Akpinar, Muhammet Vefa(3)
- Akpınar, Özlem(3)
- Avci, Ibrahim(3)
- Aydoğmuş, Ercan(3)
- Bozbeyoğlu, Pınar(3)
- Cakir, Mehmet Ali(3)
- Camoglu, Aslihan Yilmaz(3)
- Cavusoglu, Ibrahim(3)
- Daulay, Amru(3)
- Ercikdi, Bayram(3)
- Komut, Osman(3)
Yayınlar
- MakaleAçık Erişim2026Valorization of Moss biomass as a natural porous Matrix for shape-stable phase change material (PCM) composites
Can, Ahmet; Ganguly, Sauradipta; Gencel, Osman; Sarı, Ahmet; Erata, Hüseyin
Phase change materials (PCMs) are used to improve energy efficiency, particularly in building heat storage and passive thermal management applications. In this study, moss biomass ( Calliergonella cuspidata (Hedw.) Loeske) (Ca) was evaluated as a natural porous matrix, and a novel non leachable composite phase change material (PCM) was developed based on n-octadecane (n-OD). The moss biomass was impregnated with 60% n-OD by direct mixing method, and its structural stability was enhanced by the addition of Sodium silicate (SS) at 10% and 30% (by wt%) respectively. The morphological, chemical, and thermal properties of the composites were characterized by SEM, EDS, FTIR, DSC, TGA, XRD, and thermal conductivity analyses. SEM-EDS results showed that the moss biomass (Ca) had high porosity, with the addition of SS resulting in a more compact and homogeneous structure. FTIR analyses exhibited the formation of Si–O–Si bands, indicating successful integration of SS into the matrix. According to DSC analysis, the Ca/n-OD(60%) composite had a melting temperature of 26.1 °C and a melting enthalpy of 153.7 J/g whereas for the SS-added variants, these values were measured as 148.3 J/g (10%) and 144.2 J/g (30%), respectively. The enthalpy losses of only 2–3 J/g after 700 heating-cooling cycles indicated high thermal stability. TGA and XRD analyses showed that the addition of SS increased the thermal resistance of the composites, creating an amorphous network structure. The results indicate that moss-based Ca/n-OD/SS composites, with their compact, leak-free structure, high heat storage capacity, and excellent cyclic stability, hold promise as eco‑friendly materials for subsequent applications in: thermal energy storage for buildings, solar energy systems, and the thermal management of electronic components.
- Derleme MakaleYalnız künye2026Red mud as a source of scandium: A review
Kumaş, Cavit; Prasetia, Hendra; Astuti, Widi; Sumardi, Slamet; Mufakhir, Fika Rofiek; Fasya, Muhammad Rizki Firdaus
The residue produced during the extraction of aluminum from bauxite ore via the Bayer process is known as red mud (RM), with 0.5–2.5 t of RM generated for each ton of alumina produced. Due to its highly alkaline nature (pH = 10.0–12.5), RM poses significant environmental threats and requires large storage areas. To address this environmental concern and develop sustainable way to utilize RM, extensive research has been conducted in fields such as soil remediation, metal recovery, steel production, catalytic reactions, cheap adsorbents for pollutant removal, ceramics, brick production, and pigment and slag additives for paint production. While early studies on metal recovery from RM focused on the recovery of metals such as Fe and Al, recent years have seen an increase in research on Sc recovery from RM, as RM is now recognized as an important source for Sc. This review examines in detail methods such as direct acid leaching, bioleaching, acid baking, and water leaching used for Sc recovery from RM. Additionally, data on the recovery of not only Sc but also other metals from RM are presented.
- MakaleAçık Erişim2026Green Synthesis and Bioactivities of Silver Nanoparticles Derived from Mercurialis annua L. Extract
Salad, Aisha Mohamud; Akar, Zeynep
Biogenic synthesis using plant materials provides a sustainable alternative to classical nanoparticle fabrication, minimizing chemical hazards and decreasing energy input. In this study, silver nanoparticles (AgNPs) were prepared using an aqueous extract of Mercurialis annua and characterized. Physicochemical properties of the AgNPs were confirmed using ultraviolet–visible spectroscopy (UV–Vis), Fourier transform infrared (FTIR) analysis, X-ray diffraction (XRD), and transmission electron microscopy coupled with energy-dispersive X-ray (TEM–EDX), which collectively indicated crystalline, spherical silver nanoparticles stabilized by extract-derived functional groups. Subsequently, the biological activities of both the nanoparticles and the extract were comparatively evaluated using antioxidant tests, including cupric ion reducing antioxidant capacity (CUPRAC), ferric reducing antioxidant power (FRAP), 2,2-diphenyl-1-picrylhydrazyl (DPPH), total phenolic content (TPC), and total flavonoid content (TFC), as well as enzyme inhibition tests targeting α-glucosidase and carbonic anhydrase. Liquid chromatography-mass spectrometry profiling identified 31 phenolic constituents in the extract, with ferulic, caffeic, salicylic, and 4-hydroxybenzoic acids detected in high abundance. Overall, the biosynthesized AgNPs demonstrated higher antioxidant performance and stronger inhibitory effects on both enzymes compared with the crude extract. These results indicate that M. annua-based AgNPs hold considerable promise sustainable and effective bioactive agents for future biomedical and biotechnological applications.
- MakaleYalnız künye2026Valorization of tea industry waste into boric acid–activated carbon for phenol removal from aqueous solutions
Duran, Celal; Ozdes, Duygu; Ozdemir, Olcay; Onal, Yunus; Gundogdu, Ali
The tea industry generates substantial quantities of solid waste with limited high-value industrial applications. In this study, tea industry waste was converted into boric acid-activated carbon (BA–TAC) through a simple one-step chemical activation process and evaluated as an adsorbent for phenol removal from aqueous solutions. BA–TAC exhibited a mixed micro–mesoporous structure with a BET surface area of 592.59 m2 g−1. The adsorption performance was investigated as a function of solution pH, contact time, and initial phenol concentration. Adsorption kinetics were evaluated using pseudo-first order, pseudo-second order, Elovich, Avrami, and intraparticle diffusion models, whereas equilibrium data were analyzed using Langmuir, Freundlich, and Sips isotherms. Linear, pseudo-linear, and non-linear regression approaches were comparatively evaluated, demonstrating the limitations of conventional linearization and the superiority of direct non-linear regression. Moreover, the so-called linearized forms of multi-parameter models such as Sips are not truly linear because iterative parameter estimation remains necessary. The maximum experimental phenol adsorption capacity reached 101.80 mg g−1 despite the moderate BET surface area of BA–TAC. The experimentally determined natural pH and pHpzc values, together with the limited desorption efficiency, indicated that adsorption was governed predominantly by surface chemical interactions rather than electrostatic attraction alone. XPS analysis confirmed the incorporation of boron-containing surface functionalities, highlighting their contribution to phenol adsorption. Overall, this study demonstrates the successful valorization of tea industry waste into a functional boron-modified activated carbon while providing methodological guidance for reliable adsorption kinetics and equilibrium modeling, thereby supporting sustainable waste valorization.
- MakaleAçık Erişim2026Do environmental taxes improve environmental sustainability beyond net-zero emissions? Evidence from ecological footprint subcomponents in the EU
Recepoğlu, Mürşit; Cay Cakir, Sümeyra; Cakir, Mehmet Ali; Artan, Seyfettin; Hayaloğlu, Pınar; Keşap, Doğan
Environmental degradation has manifested in various forms, including air and water pollution. Therefore, the impacts of environmental policies should be evaluated across all dimensions of environmental degradation. The European Union has targeted to stop CO2 emissions by 2050. Accordingly, the literature has predominantly focused on the relationship between environmental taxation and CO₂ emissions. Even if the net-zero emissions target is achieved, this does not necessarily ensure the elimination of overall environmental degradation. This study investigates the impact of environmental taxation on environmental degradation in the European Union over the period 1995–2021 using the Driscoll-Kraay (1998) estimator. The study focuses on the impact of environmental tax on ecological footprint and its subcomponents. The findings show that the ecological footprint and its subcomponents, except for built-up land and forest product footprints, can be mitigated by current environmental tax policies. However, in order to achieve net-zero environmental degradation, the European Union must reduce pressures arising from built-up land and forest product footprints. In addition to the Driscoll-Kraay (1998) estimator, the Feasible Generalized Least Squares (FGLS) estimator is employed as a robustness check, and the results remain broadly consistent across both methods. Moreover, Dumitrescu and Hurlin (2012) causality test states that strong and bidirectional causal relationships between environmental tax and ecological footprint components. This overall result confirms the existence of a green dividend within the double dividend hypothesis. It is suggested that renewable energy plants should be constructed in areas where built-up land and forest products footprint are not affected. For example, floating solar panels do not use land and also protect water bodies from evaporation.
- MakaleAçık Erişim2026Hydrometallurgical Extraction of Aluminum and Rare-Earth Elements (REEs) from REE-Bearing Bauxite Ores: Recent Advances
Uysal, Turan; Supriyatna, Yayat Iman
Rare-earth elements (REEs) are geologically widespread, but their mining and especially processing are concentrated in a small number of countries; as demand grows, some specific REEs may face supply shortages in the near future. Consequently, owing to their economic potential even at low concentrations, ability to provide alternative supply opportunities, and process development potential, various countries are conducting studies on REE production from secondary geological sources such as high-silica bauxite ore. This study provides a detailed examination of aluminum (Al) and REE recovery from bauxite ore, emphasizing sustainable utilization of these resources. In this context, the study presents the technological evaluation potential of these deposits in the context of modern demands, the acquisition process, and an analysis of the main technical difficulties in this process. Furthermore, the application of both mechanical and thermal activation methods in conjunction may prove more economically viable and environmentally sustainable by reducing the temperature requirements of fossil fuel-consuming heat treatment. The development of sustainable Al and REE recovery technology from bauxite ore is of significant importance, not only in terms of mitigating supply risk but also as an alternative source for REE production.
- MakaleAçık Erişim2026Solvent extraction of rare earth elements and α-alumina production from pregnant leaching solution obtained from Turkish bauxite-related ore
Erust, Ceren; Uysal, Turan
The use of bauxite-related shales as a secondary source for the extraction of rare earth elements (REEs) is very important to meet the raw material supply, which is the keystone of advanced technology applications. This study presents the investigation into the recovery of REEs from Kızıldağ shale ore and the potential utilization of its leach residue as a silica source. Mineralogical analysis revealed that the ore predominantly consists of paragonite, muscovite, quartz, pyrophyllite, and calcite. Calcined ore was subjected to acid leaching, and the resulting pregnant solution was purified using solvent extraction to separate from aluminum the ∑REEs with a content of 1887.35 ppm. Optimal solvent extraction conditions 1.5 M D2EHPA, 50% O/A ratio, pH 1.5, and 15-minute mixing time achieved 95% total REE extraction, with efficiency in the order Pr > La > Nd > Ce > Dy > Y > Sc. To purify Al from the Fe- and K-rich solution post-SX, electrolysis was performed, resulting in 97.16% precipitation efficiency of Al as Al(OH)3 at pH 5. The precipitate was subsequently roasted at 1100°C to produce α-alumina with 75.2% Al2O3 content. These findings confirm the technical feasibility of recovering REEs and producing coarse-purity alumina from Kızıldağ shale ore.
- MakaleAçık Erişim2026The mediating role of attitudes in the effect of human and environment-centered value orientation on green cosmetic product purchasing behavior: comparison of different countries
Baltacı, Duygu Çinar; Durmaz, Yakup; Baltacı, Furkan
The growing concern for environmental issues has reached a critical level, demanding immediate attention. With the widespread integration of cosmetic products into daily routines, the escalating environmental impact cannot be ignored. Consumers are increasingly scrutinizing the environmental footprint of their purchases and the practices of manufacturing companies. To maintain their competitive edge, businesses must proactively understand and address the evolving needs and expectations of their consumers. This study aims to reveal the relationships between consumers’ environmental values, attitudes toward green products, and green cosmetics purchasing behaviors to guide decision-makers in the cosmetics industry. In addition, the study also evaluated the impact of consumers’ cultural backgrounds on their attitudes toward green products and their purchasing behaviors in the green cosmetics sector. We conducted a comprehensive online survey by collecting primary data from 883 respondents from 10 countries in Asia and Europe. Our analysis used partial least squares (PLS) with SMART PLS to comprehensively examine the interrelationships between variables. An ecocentric orientation positively influences attitudes and purchasing behavior toward green cosmetic products, while an anthropocentric orientation has a negative effect. Additionally, consumers’ attitudes mediate the impact of environmental attitudes on purchasing behavior and counteract the negative effect of anthropocentric attitudes. Cultural differences significantly impact consumers’ attitudes and purchasing behavior for green cosmetics. The study’s findings offer valuable insights for cosmetic companies dealing with growing demand for cosmetic products and environmental awareness. The empirical support for existing literature is significant, and the study’s structural model enriches the green cosmetics literature. It’s essential to consider both consumers and producers for sustainable green cosmetic production, ensuring profitability and encouragement for producers.
- Kitap BölümüYalnız künye2026Sustainability and Environmental Management in Aviation: The Role of Green Approaches
Yalvaç, Güler
The aviation sector holds a strategic position due to its contributions to global economic growth and transport infrastructure, but it is also the subject of intense debate in the context of sustainability due to its environmental impact. This study was conducted to examine the role of green approaches and environmental management in aviation management. Strategies for reducing carbon emissions, energy efficiency, waste management and renewable energy use are particularly emphasised. The study highlights that the adoption of sustainable practices by airlines and airport management is critical not only for environmental benefits but also for corporate reputation, competitive advantage and customer satisfaction. The feasibility of implementing green approaches as a strategic management model in aviation is discussed, and an exemplary model is proposed. At the same time, the necessity of an environmentally friendly transformation in the sector is emphasised.
- MakaleAçık Erişim2026Process Intensification Sonocatalytic Degradation of Malachite Green Wastewater over Hydrothermally Engineered M-ZLT@Co3O4 Nanocatalyst: Structure–Activity Relationships, Radical-Mediated Mechanism and Degradation Pathways
Kıranşan, Murat
This study reports the sonocatalytic degradation of malachite green (MG) in media using synthesized Co3O4 nanoparticles and a CTAB-modified zeolite supported Co3O4 hybrid nanocatalyst (M-ZLT@Co3O4). The catalysts were characterized by XRD, FT-IR, SEM-EDX, TEM, XRF, N2 adsorption–desorption, BET, and BJH analyses, verifying crystalline Co3O4 formation, successful immobilization on the modified zeolite support, porous architecture, morphology and elemental distribution. Under optimized conditions of 1 g L−1 catalyst dosage, 20 mg L−1 MG concentration, natural pH, and 300 W L−1 ultrasonic power, M-ZLT@Co3O4 achieved 99.31% ± 0.45% degradation within 120 min. Decreasing the MG concentration to 5 mg L−1 increased the efficiency to 99.96% ± 0.64%, confirming high activity at low pollutant loading. The degradation followed pseudo-first-order kinetics, with kapp values of 0.0042–0.0595 min−1 depending on catalyst dosage, 0.0046–0.0667 min−1 for initial MG concentration, and 0.0117–0.0620 min−1 under pH conditions. Water matrix inhibition followed distilled water (99.31%) > tap water (96.08%) > river water (88.84%) > lake water (86.90%), whereas higher ultrasonic power increased degradation from 91.98% at 200 W L−1 to 99.90% at 500 W L−1. Dye degradation followed MG (99.31%) > CR (95.78%) > BY2 (92.15%) > MV (90.24%) > AO7 (85.62%) > RB19 (82.49%). Comparative tests demonstrated performance for US/M-ZLT@Co3O4 (99.31%) compared with US/Co3O4 nanoparticles (78.48%), US/ZLT (72.86%), and US/MG alone (35.71%). The best activity was obtained at 0.8–2 g L−1 catalyst dosage and 5–20 mg L−1 MG concentration, while reusability tests showed a decrease from 99.31% to 78.82% after six cycles, indicating promising stability.
- MakaleYalnız künye2026Starch-Based Microcapsules of Grape Pomace Phenolics: Physicochemical Characterization and Stability in Static In Vitro Digestion
Berktaş, Serap; İncegül, Yasemin; Çam, Mustafa
To protect phenolics of grape pomace, microencapsulation process was carried out with HI-CAP 100, Capsul TA, maltodextrin and potato starch. Encapsulation efficiencies of microcapsules were determined between 69–97%. TPC, TFC, and TAC values of starch-based microcapsules were in the ranges of 36–74 mg GAE/g, 14–28 mg CE/g, and 0.37–0.84 mg C3GE/g, respectively. Maltodextrin, with a value of 74.04 mg GAE/g, was determined to be the best coating material to retain grape pomace phenolics. Similar results were also seen in TFC (28.40 mg CE/g) and ABTS (128.2 mg TE/g) values. While water solubility values were found between 73–92% in microcapsules, grape pomace had 21.81%. The effects of coating materials on the release and bioaccessibility value of grape pomace phenolics encapsulated with different starch types in vitro digestion of oral, gastric and small intestine were investigated. Potato starch-coated microcapsules displayed the least TPC loss in gastric digestion and higher phenolics release in small intestine digestion. The microcapsule with the highest bioaccessibility in oral, gastric, and small intestine phases was Capsul TA, with values of 121%, 205%, and 120%, respectively. Additionally, potato starch-based microencapsulation of phenolics may provide alternative benefits like the slow and balanced release of phenolics in the digestive tract. Microcapsules with maltodextrin, Capsul TA and HI-CAP as coating material had amorphous structures, while potato starch resulted in crystalline structure in the microcapsules. Grape pomace phenolic starch-based microcapsules can be evaluated in the food and pharmaceutical industry depending on the intended use.
- MakaleAçık Erişim2026Valorization of pomegranate peel waste through pyrolysis-liquid-assisted ultrasound extraction: antioxidant, antibacterial and targeted phytochemical characterization
Gül, Abdulkadir; Aydoğmuş, Ercan; Özgen, İnanç; Yılmaz, Fırat; Deniz, Sermin; Arslanoğlu, Hasan
Background: Pomegranate (Punica granatum L.) peel is a phenolic-rich processing by-product, but its valorization commonly relies on conventional solvents. This study examined an integrated approach in which pomegranate peel pyrolysis liquid (PP-PL) was repurposed as the extraction medium for ultrasound-assisted extraction (UAE) of the same biomass. The methodological originality lies specifically in using biomass-derived PP-PL in UAE. Results: PP-PL-assisted extract (PP-E) and an aqueous control extract (AQ-E), prepared from the same peel batch under identical UAE conditions, were compared. The apparent gravimetric recovery of PP-E was 202.5 g kg−1. PP-E showed approximately two-fold higher total phenolic and flavonoid contents than AQ-E. In vitro agar well diffusion screening revealed the largest inhibition zone for PP-E against Staphylococcus aureus at 80 g L−1 (22.65 ± 1.50 mm), whereas AQ-E produced no detectable inhibition zones against the tested strains at the same concentration. PP-E achieved DPPH (2,2-diphenyl-1-picrylhydrazyl) and ABTS+ (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)) radical-scavenging values of 92.42 ± 0.25% and 97.00 ± 0.17%, respectively, and showed pronounced total antioxidant capacity and iron(III) ion (Fe3+)- and copper(II) ion (Cu2+)-reducing capacities. Targeted liquid chromatography–tandem mass spectrometry (LC–MS/MS) using authentic standards quantified six phenolics, with ellagic acid as the predominant analyte (2015.10 mg kg−1 extract). Conclusion: Integration of pomegranate peel pyrolysis with PP-PL-assisted UAE generated an extract exhibiting in vitro antioxidant properties and antibacterial potential in agar well diffusion screening, providing an alternative route for pomegranate peel valorization. This strategy supports the further development of biomass-derived extraction media for recovering value-added compounds from agro-industrial residues.
- MakaleAçık Erişim2026Carbon footprint assessment and reduction strategies of a university campus in Turkey
Türle, İbrahim; Celen, Pınar
As key institutions and significant energy consumers, universities have a critical responsibility to lead efforts in energy efficiency and renewable energy use to reduce their environmental impact. In this regard, the Gümüşhane University carbon probe has produced the first study that makes it possible to identify the sources of greenhouse gas emissions and provides the opportunity to track, measure, and suggest reduction strategies in the years to come. The carbon footprint of Gümüşhane University from 2017 to 2023 has been calculated and examined in this paper. The IPCC and DEFRA conversion factors served as the foundation for the computations. The results showed that the university's use of natural gas and electricity was responsible for almost all of its carbon emissions. According to the IPCC and DEFRA, the 2017 emissions were 4999.93 and 4667 tCO2e, respectively. Following a move to online instruction in 2020, emissions decreased to 3894 tCO2e under DEFRA and 4365.44 tCO2e under IPCC. However, as campus life resumed its pre-pandemic pace in 2022 and 2023, emissions rose again, surpassing 5252.04 tonnes of CO₂e by 2023 using the IPCC method and 4042 tonnes of CO₂e using the DEFRA method. These results suggest that universities need to focus on their energy consumption patterns in order to reduce their carbon emissions, for example by placing greater emphasis on renewable energy sources, energy efficiency, and balanced consumption. The outcomes of this research will act as a guideline not only for Gümüşhane University to help it reach its sustainability goals, but also for other university administrations when formulating effective carbon reduction strategies, and for institutions seeking to measure or benchmark their environmental performance.
- MakaleYalnız künye2026Analysis of microstructural properties and durability characteristics of geopolymer mortars with mining waste
Aksüt, Yavuz Selim; Kaya, Yusuf; Sünnetçi, Kadir
The growing environmental concerns over resource depletion and carbon emissions from cement production have accelerated the search for sustainable alternatives to conventional concrete. In this context, geopolymers have emerged as promising binders, particularly through the utilization of aluminosilicate-rich industrial wastes to reduce environmental impact and support waste recycling. This study examines the mechanical and durability properties of geopolymer mortars produced by partially replacing ground granulated blast furnace slag (GGBFS) with mining waste (MW) at ratios of 0%, 10%, 20%, and 30%. The mixtures were activated using 10 M sodium hydroxide and sodium silicate under standard water curing conditions. Mechanical strength, ultrasonic pulse velocity (UPV), freeze–thaw resistance, and sulfate durability were evaluated. The optimum performance was obtained with 20% MW, which achieved a 30.4% increase in flexural strength and 18% in compressive strength at 7 days. This mixture also showed the lowest mass (10.69%) and strength loss (18.36%) after 50 freeze–thaw cycles. Scanning electron microscopy analysis confirmed enhanced gel formation and microstructural densification. The findings demonstrate that controlled use of MW not only improves durability but also promotes sustainable binder development in geopolymer technology.
- MakaleAçık Erişim2026Greenwashing in Wood Substitute Products: The Case of PVC Window Frames
Top, Yener
Wood is a renewable material, and advancements in machinery have made it possible to produce wood-based products in large quantities. This has led to environmental problems, which in turn have increased consumers’ environmental concern. This concern has caused consumers to prefer environmental-friendly products. Alongside green products and green marketing, greenwashing practices, which are not actually green but exploit consumer sensitivity, have also become widespread. These deceptive claims confuse consumers and provide an unfair competitive advantage against genuinely environmentally friendly products. Polyvinyl chloride (PVC) windows, which can be used as a substitute for wood windows, were chosen as a research focus, and the greenwashing practices of enterprises manufacturing PVC window were investigated. The research was conducted using deductive content analysis. The corporate websites of the enterprises were examined in terms of greenwashing. Artificial intelligence was used, but identified greenwashing types were checked by the researcher. The study found that PVC window manufacturers most frequently resorted to greenwashing involving no proof, vagueness, and hidden trade-off approaches. Greenwashing types were also examined by topics, revealing that “general environmental benefits” is the most common type.
- MakaleYalnız künye2026Agricultural value-added, fertilizer and pesticide use, and environmental load capacity: evidence from BRICS-T countries
Akyol, Mehmet; Zuhal, Mustafa; Mete, Emrullah; Lorente, Daniel Balsalobre; Barut, Abdulkadir
The agricultural sector plays a vital role in ensuring food security and supporting sustainable economic growth. However, climate change and global warming pose significant challenges to the long-term viability of agricultural production, underscoring the need for sustainable agricultural practices. Adopting clean technologies and environmentally responsible policies is essential for balancing economic and agricultural sustainability while minimizing ecological harm. Supportive and protective agricultural inputs are widely used to enhance productivity, yet excessive, unregulated use can lead to environmental degradation. This deterioration negatively impacts ecosystems, reducing biodiversity and straining natural resources. The Load Capacity Factor (LCF) serves as a critical metric for assessing the environmental footprint of agricultural activities. This paper investigates the effects of agricultural value-added, pesticide use, and fertilizer application on LCF in BRICS-T countries. The findings indicate that these variables exhibit long-term cointegration, with varying short- and long-term impacts. To ensure the sustainability of agricultural production while safeguarding ecosystems, it is essential to integrate clean technologies, precision farming, and regenerative agricultural practices into policy frameworks. Sustainable agricultural systems and environmentally conscious policies are fundamental to securing resilient food production and long-term economic stability.
- MakaleAçık Erişim2025Sensory and physicochemical characteristics of mulberry leathers enriched with sesame, almond, sunflower seeds, coconut, and peanut
Küçük, Murat; Baltaci, Cemalettin; İlyasoğlu, Huri; Karpuz, Omer; Yilmaz, Firat; Kılınç, Kagan; Güler, Burak; Topkaya, Gamze
This study aimed to investigate the utilization of sesame, sunflower seed, almond, peanut, and coconut as condiments for the enrichment of mulberry leather, known locally as mulberry pestil. The investigation involved a comprehensive analysis encompassing proximate composition, mineral content, color, physicochemical, and sensory properties. The studied parameters of enriched samples were compared with those of the plain sample. Employing multivariate statistical techniques enabled the differentiation of the enriched leather samples. Consequently, the leather samples were categorized into three groups by the principal component analysis according to their physicochemical and chemical attributes. Strong positive correlations were observed among the studied parameters, as indicated by Spearman's rank correlation coefficients. The physicochemical and chemical properties of enriched samples exhibited substantial variability. The enriched products had abundant calcium, potassium, magnesium, iron, and zinc levels. These findings revealed that incorporating these condiments enhanced the nutritional values of leather samples, especially in terms of minerals. 100 g of the enriched mulberry leathers had 68.0-70.7 g of carbohydrate, 4.6-5.7 g of protein, 3.6-5.9 g of fat, and 336-359 kcal of energy value. The enriched products might be proposed to provide nutrients and energy in emergencies, especially for adolescents and people affected by disasters.
- Derleme MakaleAçık Erişim2025Hayvan yemlerine yeşil sentez metalik nanopartikül ilavelerinin etkileri
Kaya, Hacer
Hayvancılık işletmelerinde “mümkün olan en yüksek kalitede, en fazla ürünü, en kısa zamanda ve en ucuza üretme” amacına ulaşabilmeleri için yemde uygun mineral dengesini sağlayabilmek önemlidir. Mineraller, tüm çiftlik hayvanlarının optimum bir düzeyde büyüme ve gelişmeleri, hastalıklardan korunmaları, üremeleri ve üretmeyi sürdürebilmeleri için temel besinsel elemanlardır. Geçtiğimiz yıllarda fiziksel ve kimyasal yöntemlerle sentezlenen nano minerallerin çiftlik hayvanları üzerine etkilerini inceleyen çok sayıda çalışma yapılmıştır. Ancak bu yöntemlere alternatif olan “yeşil sentez” veya “biyosentez” adı verilen yöntemle üretilen nano minerallerin yem katkı maddesi olarak kullanımına yönelik çalışmalar da son zamanlarda dikkat çekmektedir. Yeşil sentez teknolojisi temiz, ucuz, tek adımlı ve basit, hızlı ve güvenilir olmasının yanısıra sağlık ve çevre dostu bir yöntemdir. Yeşil sentez yöntemi, bitki, bakteri, mantar, alg ve maya gibi biyolojik ajanlarda bulunan proteinler, enzimler, vitaminler, fenolik maddeler, organik asitler vb. metabolitlerin indirgeme fonksiyonu ile metal tuzları nanopartikül (NP) seviyesine dönüştürebilmesidir. En az bir boyutu 100 nm’den daha küçük olan parçacıklar NP’ler olarak adlandırılmaktadır. Nano mineraller/metal nanopartikül (MNP)’ler çok küçük boyut ve yüksek yüzey/hacim oranlarına sahip olmaları nedeniyle üstün mekanik, termal, optik ve manyetik özellikler kazanmış ve tarım, eczacılık, tıp, biyomedikal, biyoteknoloji, optik, enerji gibi farklı uygulama alanlarında yenilik için önemli bir araç haline gelmişlerdir. Bu derleme, gelişen küresel problemlere çözüm olarak, sürdürülebilir ve sıfır atık ilkelerini temel almış yeşil sentez metoduyla üretilen metal nanopartiküllerin hayvan yemlerinde kullanılma potansiyellerine ilişkin literatür verilerini özetlemektedir.
- MakaleAçık Erişim2025Production of Pure PVC, Graphene and Carbon Nanotube-Doped PVC Electrospun Nanofiber Membranes: A Highly Effective Method for Removing Acid Blue 74 Dye from Wastewater
Bozbeyoglu, Pinar; Ozkan, Vildan
Dyeing wastewater is produced by various industries, including textiles, cosmetics, tanning, and plastics. Annually, about 1.6 million tons of dyes are manufactured, with 10-15% released into the environment as wastewater. Organic dyes are particularly harmful pollutants, even at low concentrations. The adsorption technique has proven effective for removing these pollutants from water, significantly relying on the properties and efficiency of the adsorbent. Nanofibers are emerging as promising adsorbents for dye removal due to their unique properties and high efficiency. This research focuses on polymeric nanofibers to address global dye pollution, as they effectively eliminate various dyes and contaminants. However, their mechanical properties can be a limitation under harsh conditions. To enhance their strength and hydrophilicity, incorporating nanofillers like carbon nanotubes and graphene oxide has shown significant benefits. This study examines the impact of different nanofibers on the adsorption of Acid Blue 74 (AB74) dye. Pure, carbon nanotube-doped, and graphene-doped PVC nanofibers were produced via electrospinning. Their properties were analyzed using FTIR and SEM, while key parameters such as contact time, adsorbent dosage, dye concentration, and pH were assessed to understand the adsorption behavior. Additionally, dye adsorption isotherms and kinetics were investigated.
- Derleme MakaleAçık Erişim2025Hayvansal Gıda Üretiminde Su Ayak İzinin Değerlendirilmesi
Kaya, Hacer; Mazlum, Halit
Su, insan sağlığının, çevresel sürdürülebilirliğin, endüstriyel üretimin ve gıda güvenliğinin en temel unsurudur. Yerkürede kullanılabilir tatlı su kaynakları toplam su kütlesinin sadece % 2,5’ini oluşturmaktadır. Dünya nüfusundaki hızlı artış, küresel ısınma, endüstriyel üretimdeki ilerlemeler ve bilinçsiz kullanım etkileriyle sınırlı olan tatlı su kaynakları azalmaktadır. Bu anlamda su kaynaklarının verimli kullanılmasını sağlayan “su ayak izi” kavramı ön plana çıkmaktadır. Su ayak izi, genel anlamıyla bir ürünün üretiminden tüketimine kadarki tüm aşamalarda gerekli olan tatlı su miktarını ifade eder. Literatürdeki ilgili çalışmalarda, Dünya genelindeki tarımsal üretim içerisinde hayvansal ürünlerin üretimi su ayak izinin çok önemli bir kısmını (yaklaşık üçte birini) oluşturduğu bildirilmektedir. Bu çalışmalarda, et üretiminin su ayak izinin süt ve yumurta üretiminden fazla olduğu, et üretimi içerisinde de sığır etinin en yüksek paya sahip olduğu bildirilmiştir. Türkiye’de su ayak izinin sektörel dağılımında tarımsal faaliyetlerin % 89 ile ilk sırada yer alması hayvansal gıda üretiminde su yönetiminin doğru yapılmasının ülkemiz açısından önemini ortaya koymaktadır. Gelecekte, küresel nüfus artışıyla birlikte hayvansal gıda üretiminin artışı ve üretim sistemlerinin gelişmesi muhtemeldir. Bu durumun mevcut tatlı su kaynakları üzerinde ek bir baskı oluşturacağı öngörülmektedir. Bu nedenle hayvansal gıda üretiminin tüm aşamalarında gerekli olan su miktarının ürün bazında bilinmesi suyun doğru yönetimi ve verimli kullanımı açısından oldukça önemlidir. Ayrıca düşük su ayak izine sahip yemlerin kullanılması, meraya dayalı hayvancılığın teşvik edilmesi, gıda israfının önlenmesi ve üretim zincirindeki tüm paydaşların bilinçlendirilmesi hayvansal üretimde su ayak izini azaltan ilave önlemler olarak sıralanabilir. Bu çalışmada su kullanımının yüksek olduğu hayvansal gıda üretiminde su ayak izinin önemi küresel ölçekte ve Türkiye özelinde değerlendirilmiştir.
