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Browsing by Author "Yildirim, A."

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    Book Part
    Applications of Biodegradable Green Composites
    (Springer Nature, 2021) Yildirim, A.; Acay, H.
    Materials called biodegradable green composites consisting of matrices and reinforcers made entirely from natural resources are macro-, micro-, or nano-sized materials that can fulfill desired mechanical and thermal properties as well as being light. Producing natural polymers with good mechanical properties and thermal stability has attracted the attention of many researchers. The use of this material through a variety of mixtures and composites has become more and more popular as raw materials are limited and there is more concern about greener material that is environmentally friendly. Therefore, materials made from renewable sources such as biocompatible/biodegradable polymers can dominate the future by replacing the petroleum raw material. However, more efforts are needed to achieve better properties of the renewable polymer blend and composites and also to address the deficiencies of this new material. To do this, a basic understanding of renewable material types, structures, properties, and potential applications as needed. The study covers the application areas of biodegradable green composites. The stated application areas can be literature support for the rapid development of biodegradable composites at the request of researchers, manufacturers, and consumers for environmentally friendly products. © 2021, Springer Nature Singapore Pte Ltd.
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    Article
    Methylene Blue and Malachite Green Dyes Adsorption Onto Russula Delica/Bentonite
    (Elsevier Ltd, 2025) Yildirim, A.; Acay, H.
    In the current research Russula delica mushroom/bentonite clay (RDBNC) as a low-cost bionanosorbent was investigated for adsorption of methylene blue (MB) and malachite green (MG) dye from contaminated water. The bionanosorbent was characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), Scanning electron microscopy (FESEM), Thermal Gravimetric Analysis (TGA), and Zeta-potential techniques. Adsorption experiments of RDBNC for MB, MG dyes following Freundlich isotherm and pseudo second order kinetic models. To determine their effects on the adsorption efficiency, the adsorption parameters were investigated including dye concentration, contact time, temperature, and dosage of the bionanosorbent. The adsorption process can operate through three primary mechanisms: the π–π interaction, the hydrogen bonding, and electrostatic interactions between the surface of RDBNC and MB, MG dyes. Desorption results revealed that MB and MG dyes were effectively desorbed during the fourth cycle without a notable loss in adsorption capacity. The thermodynamics parameters including ΔH, ΔS, and ΔG, were determined, and the adsorption process was favorable, spontaneous, and exothermic for MB and MG. The results showed that RDBNC, which showed effective inhibition at low concentrations, especially against E. coli, can be used as a low-cost bionanosorbent synthesised for the first time to remove industrial dyes. © 2024 The Authors