Yazar "Koyuncu, Filiz" seçeneğine göre listele

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    Reducing formaldehyde emissions and enhancing performance of particleboards through the incorporation of activated carbon produced from Scots pine wood residues
    (Wiley, 2025) Ergun, Mehmet Emin; Koyuncu, Filiz; Istek, Abdullah; Ozlusoylu, Ismail
    Wood-based composite boards present a problem due to formaldehyde emissions from engineered particleboard, which pose health and environmental risks. This study explored the production of activated carbon (AC) from Scots pine (Pinus sylvestris) wood residues using phosphoric acid (H3PO4) as a chemical activator. The process of using waste biomass as raw material for AC production improves waste management and contributes to the circular economy by creating a high-value product from forestry industry byproducts. Activated carbon with a Brunauer-Emmett-Teller (BET) surface area of 1066.46 m2g-1 and a porous structure that enhances adsorption capacity was incorporated into urea-formaldehyde (UF) resin at varying levels (0.0%, 0.5%, 1.0%, and 1.5% by dry weight of the adhesive) for particleboard production. These boards were evaluated for their formaldehyde emissions, physical properties, and mechanical properties. Results showed that adding AC reduced formaldehyde emissions significantly, by up to 50%. The particleboards prepared using the modified resin also demonstrated improved physical and mechanical properties, with a 10% increase in density contributing to enhanced strength and durability. Overall, this approach shows the potential to reduce formaldehyde emissions and improve the sustainability of particleboard production, improving both environmental and human health outcomes.
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    Öğe
    Utilization of orange peel waste for activated carbon production and its application in particleboard for formaldehyde emission reduction
    (Wiley, 2025) Ergun, Mehmet Emin; Koyuncu, Filiz; Istek, Abdullah; Ozlusoylu, Ismail; Bulbul, Saban; Kilic-Pekgozlu, Ayben
    Activated carbon (AC) is valued for its large surface area, porosity, and chemical adsorption properties, making it suitable for a wide range of industrial applications. Its most common sources are coconut shells, wood, and coal - all of which are costly or harmful to the environment. It is thus important to finding sustainable feedstock, such as agricultural waste. Inexpensive materials like waste orange peel have been used in the production of AC. This study explores the synthesis of AC from orange peel waste through phosphoric acid (H3PO4) activation for potential applications in reducing volatile organic compounds such as formaldehyde emissions in particleboard production. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), nitrogen adsorption/desorption isotherms, and Fourier transform infrared (FTIR) spectroscopy were used to examine AC. The Brunauer-Emmett-Teller (BET) surface area of AC was 497 m2g(-)(1). The addition of AC to urea-formaldehyde (UF) adhesive enhanced cross-linking and condensation reactions, improving the mechanical and physical properties of particleboards without compromising integrity. The effects of AC on formaldehyde emissions were assessed at 0 and 3 months. Compared to the control group, particleboards with AC showed a 28.98% reduction in free formaldehyde emissions at 0 months and a 45.25% reduction at 3 months. Activated carbon derived from orange peels can thus improve particleboard properties while reducing formaldehyde emissions in an environmentally sustainable way.
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    Öğe
    Valorization of orange peel waste: activated carbon production and its role in enhancing particleboard performance
    (Springer, 2025) Ergun, Mehmet Emin; Koyuncu, Filiz; Istek, Abdullah; Ozlusoylu, Ismail
    The valorization of agricultural waste has gained increasing attention in recent years, with orange peel waste emerging as a promising precursor for activated carbon (AC) production. This study investigates the production of AC from orange peel waste using zinc chloride (ZnCl2) as a chemical activator and evaluates its impact on the physical, mechanical, and environmental properties of three-layer particleboards. AC was incorporated into the urea-formaldehyde (UF) adhesive at 0.5-1.5% by weight and applied to both surface and core chips, ensuring its distribution across all three layers of the particleboard. The AC exhibited a specific surface area of 572.14 m(2)/g and a total pore volume of 0.280 cm(3)/g, demonstrating its high porosity and adsorption capabilities. Mechanical test results of particleboard indicate that the inclusion of 1.5% AC increased MOR by 26% (from 10.02 N/mm(2) to 12.65 N/mm(2)) and MOE by 52% (from 1083.83 N/mm(2) to 1645.33 N/mm(2)), while IB rose from 0.41 N/mm(2) to 0.53 N/mm(2). Additionally, formaldehyde emissions of particleboard decreased significantly from 11.25 mg/100 g (control) to 8.01 mg/100 g at production (0th month) and further to 3.20 mg/100 g after 12 months. Based on TS EN 312 (2012) classification, the AC-modified panels at 1.0-1.5% met the requirements of P2 boards for general-purpose use in dry conditions, while also complying with the E1 formaldehyde emission standard. The orange peel waste-derived AC can serve as an effective additive in composite materials, simultaneously improving mechanical performance and meeting international environmental and safety standards.