Gül, Ayşe
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Name Variants
Ayşe Gül
Gul, Ayse
Gul, Ayse
Job Title
Arş. Gör.
Email Address
ayse.gul@agu.edu.tr
Main Affiliation
02.03. İnşaat Mühendisliği
02. Mühendislik Fakültesi
01. Abdullah Gül University
02. Mühendislik Fakültesi
01. Abdullah Gül University
Status
Current Staff
Website
ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
Sustainable Development Goals
13
CLIMATE ACTION
4
Research Products
17
PARTNERSHIPS FOR THE GOALS
0
Research Products
8
DECENT WORK AND ECONOMIC GROWTH
1
Research Products
9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
1
Research Products
12
RESPONSIBLE CONSUMPTION AND PRODUCTION
1
Research Products
16
PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
11
SUSTAINABLE CITIES AND COMMUNITIES
1
Research Products
1
NO POVERTY
0
Research Products
6
CLEAN WATER AND SANITATION
3
Research Products
10
REDUCED INEQUALITIES
0
Research Products
14
LIFE BELOW WATER
2
Research Products
15
LIFE ON LAND
0
Research Products
5
GENDER EQUALITY
0
Research Products
4
QUALITY EDUCATION
0
Research Products
7
AFFORDABLE AND CLEAN ENERGY
0
Research Products
3
GOOD HEALTH AND WELL-BEING
0
Research Products
2
ZERO HUNGER
0
Research Products
Documents
6
Citations
52
h-index
3
This researcher does not have a WoS ID.
Scholarly Output
8
Articles
8
Views / Downloads
26/22
Supervised MSc Theses
0
Supervised PhD Theses
0
WoS Citation Count
25
Scopus Citation Count
51
WoS h-index
3
Scopus h-index
3
Patents
0
Projects
4
WoS Citations per Publication
3.13
Scopus Citations per Publication
6.38
Open Access Source
3
Supervised Theses
0
| Journal | Count |
|---|---|
| Journal of Applied Polymer Science | 2 |
| Environmental Quality Management | 1 |
| European Journal of Sustainable Development Research | 1 |
| Bitlis Eren Üniversitesi Fen Bilimleri Dergisi | 1 |
| International Journal of Greenhouse Gas Control | 1 |
Current Page: 1 / 2
Scopus Quartile Distribution
Competency Cloud
8 results
Scholarly Output Search Results
Now showing 1 - 8 of 8
Article Citation - WoS: 9Ni-Zn Metal-Organic Framework Based Membranes for Rejection of Pb (II) Ions(Elsevier, 2022) Senol-Arslan, Dilek; Gul, Ayse; Uzal, Nigmet; Yavuz, EmreThe 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, SEM-EDX 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.Article Citation - Scopus: 30Effect of Temperature and Gas Flow Rate on CO2 Capture(Modestum, 2022) Gul, Ayse; Tezcan Un, UmranIn this study, the removal of carbon dioxide (CO2) that has a huge contribution to global warming from gas emissions was performed using absorption method. Effect of operational parameters such as temperature and gas flow rate on the absorption capacity (g CO2/kg solvent and mol CO2/mol MEA) was investigated in a bubble column reactor with a semi-batch operation. The monoethanolamine (MEA) was used as a solvent and absorption capacity was determined at different gas flow rates (2.5 and 5 L/min) and temperatures (25-35-45oC). Because of the study, absorption capacities of 74.71 g CO2 / kg MEA and 0.51 mol CO2/mol MEA were obtained at 5 L / min gas flow rate, 25oC and 20% solvent concentration. The absorption capacity increases as the temperature decreases and as the flow rate increases. Because of the study, it can be concluded that the capture of CO2 into the MEA solution at bubble column can be successfully achieved with high absorption capacity. © 2025 Elsevier B.V., All rights reserved.Article Citation - WoS: 3Citation - Scopus: 3Optimization of Carbon Dioxide Absorption in a Continuous Bubble Column Reactor Using Response Surface Methodology(Wiley, 2023) Gul, Ayse; Derakhshandeh, Masoud; Un, Umran TezcanCarbon dioxide absorption using amine based solvents is a well-known approach for carbon dioxide removal. Especially with the increasing concerns about greenhouse gas emissions, there is a need for an optimization approach capable of multifactor calibration and prediction of interactions. Since conventional methods based on empirical relations are not efficiently applicable, this study investigates use of Response Surface Methodology as a strong optimization tool. A bubble column reactor was used and the effect of solvent concentration (10.0, 20.0 and 30.0 vol%), flow rate (4.0, 5.0 and 6.0 L min-1), diffuser pore size (0.5, 1.0 and 1.5 mm) and temperature (20.0, 25.0 and 30.0 degrees C) on the absorption capacity and also overall mass transfer coefficient was evaluated. The optimization results for maintaining maximum capacity and overall mass transfer coefficient revealed that different optimization targets led to different tuned operational factors. Overall mass transfer coefficient decreased to 34.7 min-1 when the maximum capacity was the desired target. High reaction rate along with the highest absorption capacity was set as desirable two factor target in this application. As a result, a third scenario was designed to maximize both mass transfer coefficient and absorption capacity simultaneously. The optimized condition was achieved when a gas flow rate of 5.9 L min-1, MEA solution of 29.6 vol%, diffuser pore size of 0.5 mm and temperature of 20.6 degrees C was adjusted. At this condition, mass transfer coefficient reached a maximum of 38.4 min-1, with a forecasted achievable absorption capacity of 120.5 g CO2 per kg MEA.Article Citation - Scopus: 1Eco-Friendly Fabrication of Cellulose-Derived Polyvinylidene Fluoride Membranes From Wastepaper for Efficient Fe(II) Removal From Mine Wastewater(Wiley, 2025) 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 Carbon Dioxide Absorption Using Different Solvents (Mea, Naoh, Koh and Mg(Oh)2) in Bubble Column Reactor(2023) Gul, Ayse; Un, Umran TezcanThe aim of this research is to reduce emissions by capturing carbon dioxide in a solution using an absorption method. The absorption capacity, absorption rate, carbon dioxide removal efficiency, and overall mass transfer coefficient of MEA (Monoethanolamin) and alkaline solvents (NaOH, KOH, Mg(OH)2) were investigated using a bubble column gas absorption reactor with counter current flow. The effects of operational parameters such as solvent concentration (0.01, 0.05, and 0.25M) and solvent type were studied. As a result of the study, it was determined that Mg(OH)2 was less effective in capturing CO2 than KOH, NaOH, and MEA. For all solvent types, the total mass transfer coefficient, absorption rate, and CO2 removal efficiency were increased with the increase in the concentration of solvent. The solvent concentration is increased from 0.01 M to 0.25 M to obtain the highest KGa values for MEA, NaOH, and KOH, 3.75 1/min for MEA, 3.70 1/min for NaOH, and 3.93 1/min for KOH.The MEA, NaOH, and KOH absorption rates were maximum at 0.25 M solvent concentrations as 0.19x103 mol/Ls. The maximum CO2 removal efficiencies for MEA, NaOH, and KOH at 0.25 M solvent concentration are greater than 60%. The highest absorption capacity, 0.576 mol CO2/mol MEA, was obtained at a solvent concentration of 0.01M MEA.Article Citation - WoS: 6Citation - Scopus: 9Carbon Dioxide Absorption Using Monoethanolamine, Piperazine and N-Metil Solvents Under Counter Current Regime in Packed Column Reactor(Elsevier Sci Ltd, 2024) 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.Article Citation - WoS: 1Citation - Scopus: 2Enhancing Oil Rejection in PVDL and PSF Membranes: The Role of SiO2 NPS(Wiley, 2025) Senol-Arslan, Dilek; Gul, AyseOily water negatively affects both land and marine ecosystems. To combat this, membrane production can effectively treat oil waste and recycle over 90% of it. This study compares the influence of SiO2 nanoparticles on oil rejection in two types of membranes: polyvinylidene fluoride (PVDF) and polysulfone (PSF). The SiO2 NPs are characterized by FTIR, SEM analysis, and zeta potential measurements. SiO2 NPs embedded PSF and PVDF membranes were characterized by FTIR, SEM analysis, contact angle, water permeability, oil rejection measurements, and recycling experiments. The results of the experiments showed that oil rejection reached maximum values of 92.2% for 2 wt% PSF/SiO2, and 94.1% for 2 wt% PVDF/SiO2 membranes. The experimental results demonstrate that the incorporation of SiO2 nanoparticles enhances the oil rejection efficiency of two distinct membrane types, exhibiting notable performance disparities contingent on the selected membrane material. This methodology achieves a recycling rate of over 90% for oil waste, signifying a substantial advancement in environmental protection and sustainable development. Consequently, the membrane production technique is regarded as an efficacious approach for the management and recycling of oil waste.Article Citation - WoS: 6Citation - Scopus: 6The Different Impacts of g-C3N4 Nanosheets on PVDF and PSF Ultrafiltration Membranes for Remazol Black 5 Dye Rejection(Wiley, 2023) Senol-Arslan, Dilek; Gul, Ayse; Dizge, Nadir; Ocakoglu, Kasim; Uzal, NigmetMembranes combined with nanoparticles are an excellent combination capable of successfully removing various contaminants, such as dyes from wastewater while using very little energy and decreasing pollution. The present study reports an efficient approach for Remazol Black 5 (RB5) dye removal using composite graphitic carbon nitride nanosheets (g-C3N4), polysulfone (PSF), and polyvinylidene fluoride (PVDF) membranes. The membranes were prepared using the phase inversion method, with varying quantities of g-C3N4 nanosheets ranging from 0.1%, 0.2% to 0.3%. The prepared g-C3N4 nanosheets were characterized by FTIR, SEM analyses, and zeta potential measurements. FTIR and SEM studies, contact angle, water permeability, COD, and dye rejection measurements were used to characterize the g-C3N4 nanosheets embedded in PSF and PVDF membranes. After the addition of 0.3 wt% g-C3N4, the water flux of the 0.3 wt% g-C3N4 embedded PSF membrane was the highest, whereas the water flux of the 0.3 wt% g-C3N4 embedded PVDF membrane was the lowest. The ultrafiltration (UF) membrane's performance with g-C3N4 embedded showed an RB5 rejection rate of more than 80% and a COD removal efficiency of more than 45%. The results of the experimental filtration showed that RB5 rejection reached maximum values of 91.3% for 0.1 wt% g-C3N4/PSF, and 85.6% for 0.3 wt% g-C3N4/PVDF.
