Browsing by Author "Şenol Arslan, Dilek"

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Fabrication of Gd2O3/PSF Membranes via Aqueous Phase Inversion Method
(HİTİT ÜNİVERSİTESİ, 2022) Gül, Ayşe; Şenol Arslan, Dilek; Uzal, Nigmet; 0000-0001-9639-2843; 0000-0002-2305-6408; 0000-0002-0912-3459; AGÜ, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümü; Gül, Ayşe; Şenol Arslan, Dilek; Uzal, Nigmet
The purpose of this study was to look into the effect of Gadolinium oxide (Gd2O3) concentration (0.5%, 1%, and 2%) on the performance of newly developed Gd2 O3 /PSF membranes A common phase inversion method was used to create the membranes. Pure water flux and bovine serum albumin (BSA) permeation tests were used to evaluate membrane performance. FTIR and contact angle measurements were used to characterize the membranes that were manufactured. The greatest percentage of BSA rejection was 53%. In this work, the optimum membrane (2% wt Gd2O3/17% wt PSF) successfully demonstrated 53% rejection with filtrate flux for about 8.7 L/m2.h at a pressure of 10 bar.
Ni-Zn metal-organic framework based membranes for rejection of Pb (II) ions
(ELSEVIERRADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS, 2022) Senol-Arslan, Dilek; Gul, Ayse; Uzal, Nigmet; Yavuz, Emre; AGÜ, Mühendislik Fakültesi, Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü; Şenol Arslan, Dilek; Gül, Ayşe; Uzal, Niğmet
The present paper describes a sustainable and affordable supply of clean, and safe water approach to investigate Ni-Zn MOF embedded membrane for rejection of Pb (II) ions in aqueous solution. Ni-Zn MOF powder was prepared by solvo-thermal method, and then the Ni-Zn MOF embedded membranes with various concentrations (0.025 wt%, 0.05 wt% and 0.1 wt%). The membranes were fabricated by a common phase inversion method. Phase solutions of Pb(II) prepared with PVP at different concentrations in aqueous solutions. Water filtration and Pb (II) rejection tests were operated on a batch scale. The prepared Ni-Zn MOF powder characterized by FTIR, SEM-EDX analyses and zeta potential measurements. Ni-Zn MOF membranes were characterized by FTIR, SEMEDX analysis, contact angle, and water permeability measurements. The effects of important parameters on adsorption including concentration and pH were investigated. The obtained results indicated that the maximum rejection of Pb(II) was 98% for a feed solution containing 80 mg Pb/L at pH 8 and assistance with 2 % PVP for 0.05 wt% Ni-Zn MOF membrane. Additionally, it was detected that blend membranes revealed better Pb(II) rejection than pure PSF membrane.
Performance Comparison of Waste Cooking Oil on Coal Slime Flotation with Sunflower Oil and Gas Oil
(Hittite Journal of Science and Engineering, 2023) Şenol Arslan, Dilek; Hacıfazlıoğlu, Hasan; 0000-0001-9639-2843; AGÜ, Mühendislik Fakültesi, Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü; Şenol Arslan, Dilek
This study explores the potential use of waste cooking sunflower oil (WSO) as an eco-friendly collector for coal slime flotation. WSO and coal slime are both wastes and are hazardous to human health and the environment, if not disposed of properly. In this study, co-disposal of the two wastes was investigated; a gas oil (petroleum derived oil) and crude sunflower oil (CSO) were used for collector efficiency comparisons. This study also presents a green, low-cost and environmentally friendly alternative. Kinetic flotation tests were carried out to study the flotation selectivity, flammability and combustible recovery. Contact angle measurements were performed with 3 different oils (CSO, WSO and gas oil) by sessile drop technique to determine the hydrophobicity and surface properties of coal. Fourier-transform infrared (FTIR) spectroscopy was utilized to analyze the chemical composition of both waste oil and coal samples. Keywords: Sunflower oil, waste cooking oil, gas oil, coal slime, flotation
Türkiye’de farklı yörelerde bulunan kolemanit minerallerinin fiziksel, kimyasal ve termal özelliklerinin tayini
(GÜMÜŞHANE ÜNİVERSİTESİ, 2021) Şenol Arslan, Dilek; 0000-0001-9639-2843; AGÜ, Mühendislik Fakültesi, Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü; Şenol Arslan, Dilek
Bu çalışmada, Türkiye bor rezevlerinin yaklaşık %76’sını oluşturan bilimsel ve teknolojik gelişmeler sonucu elde edilen uygulamalarda sıklıkla kullanılan, önemli bir bor minerali olan kolemanit kullanılmıştır. Bu kapsamda, ilk önce kolemanit minerali hakkında detaylı bir literatür taraması yapılmıştır. Türkiye’de toplam dört yörede bulunan kolemanit (Kestelek, Emet (Hisarcık, Espey), Bigadiç yöreleri) numunelerinin yapısal ve karakteristik özellikleri (X-Ray Difraksiyon), ICP- MS (İndüktif Eşleşmiş Plazma, ICP ve Kütle Spektrometresi, MS), TG-DTA (Termogravimetrik ve Diferanasiyel termal analiz), FT-IR (Kızılötesi (IR) absorbsiyon spektroskopisi) analizleri ile belirlenmiştir. Elde edilen sonuçlar doğrultusunda saf kolemanit kristallerinin minerolojik, kimyasal ve termal özellikleri tespit edilip, numuneler arasındaki benzerlik ve farklılıkların ortaya konulması amaçlanmıştır.