Person: GÖÇENOĞLU SARIKAYA, ASLI
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GÖÇENOĞLU SARIKAYA
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ASLI
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Publication Adsorptive removal of textile dye direct blue 9 from aqueous solution by nano-sized polymers: Kinetic and thermodynamic studies(Hard, 2020-01-01) Sarıkaya, Aslı Göçenoğlu; GÖÇENOĞLU SARIKAYA, ASLI; Bursa Uludağ Üniversitesi/Fen-Edebiyat Fakültesi; 0000-0002-7161-7003; AAC-6901-2020In this study, polymeric nanoparticles were used as an adsorbent to remove the textile dye Direct Blue 9 (DB9) from an aqueous solution. Adsorption capacity of the polymeric nanoparticles were determined in various conditions such as pH, temperature, and dye concentration. Kinetic parameters were also calculated. Optimum initial pH, temperature and equilibrium time were determined as 6.0, 318 K and 90 minutes, respectively. The maximum adsorption capacity of adsorbent and percentage removal of DB9 were detected as 15.49 mg/g and 98.15%, respectively. To clarify the nature of the adsorption process isotherm, thermodynamic and kinetic studies were also performed. The adsorption process obeys the Langmuir isotherm model and pseudo-second order model.Publication Biosorption of sirius blue azo-dye by agaricus campestris biomass: Batch and continuous column studies(Elsevier, 2021-11-10) Sarıkaya, Aslı Göçenoğlu; Kopar, Emre Erden; GÖÇENOĞLU SARIKAYA, ASLI; Bursa Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Bölümü; 0000-0002-7161-7003; AAC-6901-2020In this study, biosorption of azo-dye Sirius Blue K-CFN (SB) was investigated from aqueous solution by using Agaricus campestris biomass as a biosorbent. Operating batch system conditions like pH, temperature, initial SB concentration and biosorbent dosage were studied. Optimum initial pH was determined as pH 3.0. The percentage of biosorption was determined as 97.32% for 80 mg/L SB at 45 degrees C. The maximum biosorption capacity was increased with increasing initial SB concentration and temperature. The experimental results were represented by the Freundlich isotherm model. The negative values of Delta G degrees indicated that the biosorption process of SB onto A. campestris biomass is spontaneous. Continuous column studies were also performed to show the efficiency of fungal biomass as a biosorbent for SB. In column system, the effect of flow rate (3-7 mL/min), packing heights (3-7 cm) and dye concentration (20-80 mg/L) were studied. Since A. campestris can be effectually used as a biosorbent for the SB azo-dye biosorption.Publication Biosorption of hexavalent chromium metal ions by lentinula edodes biomass: Kinetic, isothermal, and thermodynamic parameters(Slovensko Kemijsko Drustvo, 2021-01-01) Sarıkaya, Aslı Göçenoğlu; GÖÇENOĞLU SARIKAYA, ASLI; Bursa Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Bölümü; 0000-0002-7161-7003; AAC-6901-2020Lentinula edodes was investigated as a biosorbent for hexavalent chromium biosorption in this study. To examine the optimum conditions of biosorption, the pH of the hexavalent chromium solution, biosorbent dosage, temperature, contact time, and initial hexavalent chromium concentration were identified. Further, to clarify the biosorption mechanism process, the isothermal, kinetic, and thermodynamic parameters were determined. The functional groups and surface morphology of the biosorbent were identified using Fourier transform infrared spectrometry and scanning electron microscopy in the absence and presence of hexavalent chromium, respectively. Based on the results, the maximum biosorption capacity was determined as 194.57 mg g(-1) under acidic conditions at 45 degrees C. From the kinetics studies, the biosorption process was observed to follow the Freundlich isotherm and pseudo-second-order kinetic models well. Thus, L. edodes as a biosorbent has potential usage for wastewater treatment owing to its effective biosorption capacity.Publication Adsorption of cinnabarinic acid from culture fluid with magnetic microbeads(Wiley, 2016-02-01) Sarıkaya, Aslı Göçenoğlu; Osman, Bilgen; Kara, Ali; Pazarlıoğlu, Nurdan; Besirli, Necati; GÖÇENOĞLU SARIKAYA, ASLI; OSMAN, BİLGEN; KARA, ALİ; Besirli, Necati; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Bölümü,; 0000-0002-7161-7003; 0000-0001-8406-149X; 0000-0003-2457-6314; AAC-6901-2020; ABF-4791-2020; JXW-6168-2024; AAG-6271-2019In this study, antimicrobial pigment cinnabarinic acid (CA) was produced from Pycnoporus cinnabarinus in laboratory-scale batch cultures. Magnetic poly(ethylene glycol dimethacrylate-N-methacryloyl-l-tryptophan methyl ester) [m-poly(EGDMA-MATrp)] beads (average diameter = 53-103 mu m) were synthesized by copolymerizing of N-methacryloyl-l-tryptophan methyl ester (MATrp) with ethylene glycol dimethacrylate (EGDMA) in the presence of magnetite (Fe3O4) and used for the adsorption of CA. The m-poly(EGDMA-MATrp) beads were characterized by N-2 adsorption/desorption isotherms (Brunauer Emmet Teller), X-ray photoelecron spectroscopy, scanning electron microscopy, infrared spectroscopy, thermal gravimetric analysis, electron spin resonance and swelling studies. The efficiency of m-poly(EGDMA-MATrp) beads for separation of CA from culture fluid was evaluated. The effects of pH, initial concentration, contact time and temperature on adsorption were analyzed. The maximum CA adsorption capacity of the m-poly(EGDMA-MATrp) beads was 272.9mgg(-1) at pH7.0, 25 degrees C. All the isotherm data can be fitted with the Langmuir, Freundlich and Dubinin-Radushkevich isotherm models. The adsorption process obeyed pseudo-second-order kinetic model. Thermodynamic parameters H = 5.056kJmol(-1), S = 52.44JK(-1)mol(-1) and G = -9.424kJmol-(1) to -11.27kJmol-(1) with the rise in temperature from 4 to 40 degrees C indicated that the adsorption process was endothermic and spontaneous.