Scopus İndeksli Yayınlar Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12573/395
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Article Citation - Scopus: 2Eco-Friendly Fabrication of Cellulose-Derived Polyvinylidene Fluoride Membranes From Wastepaper for Efficient Fe(II) Removal From Mine Wastewater(Wiley, 2025-08-15) Gul, Ayse; Senol-Arslan, DilekThis study investigates the feasibility of utilizing cellulose membranes derived from wastepaper to remove Fe(II) ions from mine wastewater. In this context, the recycled material cellulose was employed in the membrane synthesis process to produce an environmentally friendly membrane that efficiently removes Fe(II) ions. Furthermore, the study proposes a cost-effective and sustainable solution for removing heavy metals, with comprehensive analysis and experimentation on the potential application of cellulose membranes in the treatment of mine wastewater. The membranes were fabricated from polyvinylidene fluoride (C2H2F2)n (PVDF) and cellulose nanoparticles (CNs) produced from wastepaper by a common phase inversion method. Water filtration and Fe(II) rejection tests were operated on a batch scale. The fabricated CNs were characterized by Fourier transform infrared (FTIR) and SEM-energy-dispersive X-ray (EDX) analyses. Water permeability, contact angle, SEM-EDX analysis and FTIR were used to analyze PVDF/CN membranes. The water flux for PVDF and PVDF + CN membranes increased from 164.5 to 2241 L m-2 h-1 on the addition of CNs from 1% to 3%. The experimental results demonstrate the best cellulose membrane containing 11% PVDF + 2% CN effectively removed approximately 58% of Fe(II). The findings of this research emphasize the importance of environmentally friendly approaches in addressing clean water challenges and highlight the reuse potential of waste materials for innovative applications. Consequently, this study provides an alternative to the development of sustainable and cost-effective solutions for wastewater treatment in accordance with the principles of circular economy and environmental sustainability. (c) 2025 Society of Chemical Industry.Article Citation - WoS: 10Citation - Scopus: 13Carbon Dioxide Absorption Using Monoethanolamine, Piperazine and N-Metil Solvents Under Counter Current Regime in Packed Column Reactor(Elsevier Sci Ltd, 2024-01) Gul, Ayse; Baris, Mesut; Un, Umran TezcanIn this research the carbon dioxide absorption using Monoethanolamine (MEA), Piperazine (PZ) and N-Metil-2-pirolidon (NMP) solvents and their different blends (MEA/NMP, PZ/NMP, MEA/PZ) in packed column reactor filled with Raschig rings was investigated and compared for efficient carbon dioxide absorption. The process was followed in a countercurrent regime under a liquid flow rate of 200 mL/min, gas flow rate of 2.5 L/min, and CO2 concentration of 50,000 ppm. Carbon dioxide removal efficiency (%), absorption capacity (mol CO2/mol solvent), overall mass transfer coefficient (1/min) and absorption rate (mol/l.s) were monitored. The highest obtained values for carbon dioxide removal efficiency, absorption capacity and overall mass transfer coefficient were 57.5%, 0.148 mol CO2/mol solvent and 2.178 min-1 respectivelly when 0.03 M MEA/0.07 M PZ in a hybrid system was used. It was concluded that PZ blends with MEA were successful absorbent as the organic physical solvent whereas NMP didn't show improving effect in blends with MEA on the absorption efficiency.