Alacabey, İhsan
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Alacabey, Ihsan
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Doçent
Email Address
ihsanalacabey@hotmail.com
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Department of Medical Services and Techniques / Tıbbi Hizmetler ve Teknikleri Bölümü
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Sustainable Development Goals
17
PARTNERSHIPS FOR THE GOALS
0
Research Products
2
ZERO HUNGER
0
Research Products
5
GENDER EQUALITY
0
Research Products
6
CLEAN WATER AND SANITATION
3
Research Products
13
CLIMATE ACTION
0
Research Products
10
REDUCED INEQUALITIES
0
Research Products
16
PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
8
DECENT WORK AND ECONOMIC GROWTH
0
Research Products
15
LIFE ON LAND
0
Research Products
3
GOOD HEALTH AND WELL-BEING
2
Research Products
9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
0
Research Products
14
LIFE BELOW WATER
1
Research Products
4
QUALITY EDUCATION
0
Research Products
1
NO POVERTY
0
Research Products
7
AFFORDABLE AND CLEAN ENERGY
0
Research Products
11
SUSTAINABLE CITIES AND COMMUNITIES
2
Research Products
12
RESPONSIBLE CONSUMPTION AND PRODUCTION
0
Research Products
Documents
14
Citations
469
h-index
9
Documents
13
Citations
422
Scholarly Output
16
Articles
14
Views / Downloads
75/1273
Supervised MSc Theses
1
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0
WoS Citation Count
208
Scopus Citation Count
231
WoS h-index
8
Scopus h-index
8
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0
Projects
1
WoS Citations per Publication
13.00
Scopus Citations per Publication
14.44
Open Access Source
11
Supervised Theses
1
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| Journal | Count |
|---|---|
| Molecules | 2 |
| Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi | 1 |
| Environmental Research, Engineering and Management | 1 |
| Environmental Science and Pollution Research | 1 |
| Frontiers in Chemistry | 1 |
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16 results
Scholarly Output Search Results
Now showing 1 - 10 of 16
Article Cryogel-Immobilized Catalase as a Biocatalyst with Enhanced Stability Against Microplastics(MDPI, 2025) Erol, Kadir; Alkan, Mehmet Huseyin; Alacabey, IhsanCatalase is a pivotal antioxidant enzyme that decomposes hydrogen peroxide and reduces oxidative stress. However, its low thermal and operational stability limits applications in challenging environments, particularly those contaminated with emerging pollutants such as polystyrene-based microplastics (PS-MPs). In this study, cryogels composed of Poly(2-hydroxyethyl methacrylate-co-allyl glycidyl ether) [Poly(HEMA-co-AGE)] were synthesized and evaluated as immobilization matrices to enhance catalase stability. Cryogels containing varying AGE concentrations were characterized using FT-IR, SEM, TEM, TGA, and BET analyses. The formulation with 250 mu L AGE exhibited optimal physicochemical properties, including improved water retention, increased surface area, and high immobilization capacity (356.3 mg center dot g(-1)). Immobilized catalase maintained superior activity under PS-MP-induced stress across a range of concentrations (0-1.0 mg center dot mL(-1)), temperatures (4-60 degrees C), and exposure times (up to 5 h). Kinetic modeling revealed a significant improvement in substrate affinity, with Km decreasing from 54.9 to 17.1 mM, while Vmax decreased moderately. Long-term stability tests showed that immobilized catalase retained similar to 80% activity after 70 days at 4 degrees C and 55% after 15 reuse cycles. Desorption studies confirmed the reusability of the cryogel system. These findings suggest that Poly(HEMA-co-AGE) cryogels provide a robust and reusable platform for catalase stabilization, offering potential for applications such as wastewater treatment and biosensing in microplastic-contaminated systems.Moving Image Determination of Hair and Serum Metal Levels in Petrol Station Workers(2019) Kömüroğlu, Ahmet Ufuk; Alacabey, İhsan; Atasoy, Nurhayat; Üçler, RıfkıThe aim of this study is to determine some metals in hair and serum samples of petrol station workers. A total of 50 petrol station workers (exposure group) and 50 office workers (control group) were included in the study. Li, Ni, V, Tl, Ti and Sr levels in hair samples and Sr, Ti and V levels in serum samples were measured using the ICP-OES instrument. Li, Ni, V, Tl, Ti and Sr levels in hair samples were found to be significantly higher in the exposure group than in the control group. Ti level in serum samples was found to be significantly higher in the exposure group than in the control group. However, Sr and V levels in serum samples did not differ significantly between the two groups. These results show that petrol station workers are exposed to these toxic metals. For this reason, it may be recommended that petrol station workers should undergo regular biomonitoring and healthcare screening.Article Citation - WoS: 24Citation - Scopus: 25Investigation of the effectiveness of waste nut shell–based hydrochars in water treatment: a model study for the adsorption of methylene blue(SpringerLink, 2022) Teğin, İbrahim; Demirel, Mehmet Ferit; Alacabey, İhsan; Yabalak, ErdalThousands of tons of walnut and pistachio green outer shells emerge as waste sources. Recycling such wastes in environmental applications is of great importance. In this study, the efciency of waste walnut and pistachio shell–based hydrochars in removing methylene blue (MB), which represents hazardous chemicals, from the water was investigated. Outer green pistachio shell–based hydrochar (PH) and outer green walnut shell–based hydrochar (WH) were characterized by FT-IR, SEM, EDX, TG–DTA, and BET analyses. The adsorption of MB was carried out at diferent concentrations and temperatures using WH and PH, and the adsorption parameters of Langmuir and Freundlich were investigated. The R2 values of PH were calculated as 0.9963, 0.9974, and 0.9950 and of WH adsorbent were calculated as 0.9759, 0.9939, and 0.9981 for the MB adsorption at 298 K, 313 K, and 323 K, respectively. The separation factor (RL) values for WH and PH were calculated as 0.1650≥RL≥0.103, 0.1108≥RL≥0.0177, respectively. Both adsorbents ft the Langmuir model. The ΔH° values of the WH and PH adsorbents were found to be 37.0940 and 22.2493, respectively. Positive ΔH° values indicated that the adsorption was endothermic. The negative ΔG° values of both adsorbents indicated a spontaneous adsorption process. It was shown that waste nut shell–based hydrochars can be used efectively in water treatment.Article Citation - WoS: 7Citation - Scopus: 7Efficient Removal of Ciprofloxacin From Water Using High-Surface Activated Carbon Derived From Rice Husks: Adsorption Isotherms, Kinetics, and Thermodynamic Evaluation(MDPI, 2025) Demirdag, Esra; Demirel, Mehmet Ferit; Benek, Veysel; Dogru, Elif; Onal, Yunus; Alkan, Mehmet Huseyin; Alacabey, IhsanActivated carbon is widely recognized as an effective material for removing pollutants, especially pharmaceutical residues, from water. In this study, high-surface-area activated carbon derived from rice husks (RHAC) was synthesized via KOH activation and used for the adsorption of ciprofloxacin, a widely used fluoroquinolone antibiotic. Its adsorption behavior was systematically investigated through batch experiments varying the pH, adsorbent dosage, contact time, initial concentration, and temperature. The RHAC exhibited a high surface area of 1539.7 m(2)/g and achieved a maximum adsorption capacity of 398.4 mgg(-1). The Freundlich isotherm best describes its adsorption equilibrium, suggesting multilayer adsorption on a heterogeneous surface. Kinetic modeling revealed that the adsorption process followed a pseudo second-order model (R-2 = 0.9981), indicating chemisorption as the rate-limiting mechanism. Thermodynamic parameters (Delta H degrees = 6.61 kJ/mol, Delta G degrees < 0) confirmed that the process was endothermic and spontaneous. These findings demonstrate that RHAC is a highly efficient, low-cost, and sustainable adsorbent for removing ciprofloxacin from aqueous environments.Article Citation - WoS: 34Citation - Scopus: 38Magnetic diatomite for pesticide removal from aqueous solution via hydrophobic interactions(Springer Link, 2019) Erol, Kadir; Yıldız, Emrecan; Alacabey, İhsan; Karabörk, Muharrem; Uzun, LokmanPesticides are highly hazardous chemicals for the environment and human health and their use in agriculture is constantly increasing. Although 1,1,1-trichloro-2,2-bis(4-chlorophenyl) ethane 4,4′-DDT was banned at developed countries, it is still one of the most dangerous of chemical due to accumulation in the environment. It is known that the toxicity of DDT affects some enzyme systems biochemically. The main motivation of this study is to develop an effective adsorbate for the removal DDT, which was chosen as a model hydrophobic pesticide, out of aqueous systems. For this purpose, the bare diatomite particles were magnetically modified and a hydrophobic ligand attached to enhance its adsorptive and physio-chemical features. Under optimal conditions, a high adsorption capacity, around 120 mg/g with the hydrophobic and magnetic diatomite particles, modification of the diatomite particles reduced average pores diameter whereas surface area and total pore volume increased (around 15-folds). After five consecutive adsorption–desorption cycles, no significant decrease in adsorption capability was observed. The adsorption isotherms (Langmuir, Freundlich, and Flory–Huggins) applied to the data indicated that the adsorption process occurred via monolayer adsorption in an entropy-driven manner. The kinetic data also revealed the quick adsorption process without any diffusion limitationsArticle Citation - WoS: 10Citation - Scopus: 11Endosulfan Elimination Using Amine-Modified Magnetic Diatomite as an Adsorbent(Frontiers in Chemistry, 2022) Alacabey, İhsanPesticides are among the most dangerous developing toxins since they are very hazardous to the environment and threaten human health. In this study, researchers successfully manufactured surface-modified magnetic diatomite (m-DE-APTES) and used them as a sorbent to extract endosulfan from an aqueous solution. There is no other study like it in the scholarly literature, and the results are astounding. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), electron spin resonance (ESR), and surface area measurements were used to analyze magnetic diatomite particles with surface modification. According to the analysis results, magnetic diatomite has a wide surface area and a porous structure. Furthermore, m-DE-APTES has a higher endosulfan adsorption capacity (97.2 mg g-1) than raw diatomite (DE) (16.6 mg g-1). Adsorption statistics agree with Langmuir adsorption isotherm (R 2 = 0.9905), and the adsorption occurred spontaneously at -2.576 kj mol-1 in terms of ΔGo. Finally, m-DE-APTES are a viable alternative adsorbent for removing pesticides from aqueous solutions.Article Preconcentration and Determination of Cu(ii) and Cd(ii) Ions From Wastewaters by Using Hazelnut Shell Biosorbent Immobilized on Amberlite Xad-4 Resin(2023) Alacabey, İhsan; Erol, Kadir; Teğin, İbrahim; Akdeniz, Selma; Acar, OrhanHazelnut shell biosorbent immobilized on Amberlite XAD-4 polymer resin as solid phase extraction method was developed and used for preconcentration of Cu(II) and Cd(II) ions from aqueous solutions. Concentrations of analytes in solutions were determined by Flame Atomic Absorption Spectrometry after extraction with column technique. Functional groups of nutshell biosorbent immobilized on resin were characterized by Fourier transform infrared spectrometry. Optimized critical parameters for preconcentration of Cu2+ and Cd2+ ions from sample solutions with nutshell immobilized on the resin were the pH value of solution, type of eluent solutions, the flow rate of sample solution, quantities of nutshell biosorbent, Amberlite XAD-4 resin, and enrichment factors, respectively. Detection limits of Cu2+ and Cd2+ ions found were 0.29 μg L-1 and 0.25 μg L-1, respectively. The method proposed was applied for determinations of Cu2+ and Cd2+ ions in standard reference material (BCR-670 aquatic plant sample) for accuracy and applied to real water samples such as wastewater and Van lake water. At the 95% confidence level, relative standard deviations (RSDs) were found as 1.44% for Cd2+ and 1.21% for Cu2+ ions with three replicate measurements.Article Citation - WoS: 25Citation - Scopus: 32Antibiotic Removal from the Aquatic Environment with Activated Carbon Produced from Pumpkin Seeds(Molecules, 2022) Alacabey, İhsanAntibiotics are among the most critical environmental pollutant drug groups. Adsorption is one of the methods used to eliminate these pollutants. In this study, activated carbon was produced from pumpkin seed shells and subsequently modified with KOH. The adsorbent obtained through this procedure was used to remove ciprofloxacin from aqueous systems. Fourier Transform-Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), elemental, X-ray Photoelectron Spectroscopy (XPS), Brunauer–Emmett–Teller (BET) and Zeta analyses were used to characterize the adsorbent. The surface area, in particular, was found to be a very remarkable value of 2730 m2/g. The conditions of the adsorption experiments were optimized based on interaction time, adsorbent amount, pH and temperature. Over 99% success was achieved in removal operations carried out under the most optimal conditions, with an absorption capacity of 884.9 mg·g−1. In addition, the Langmuir isotherm was determined to be the most suitable model for the adsorption interactionArticle Van Gölü Doğal Sediment ve Modifiye Sediment Üzerine Krom (III) Adsorpsiyonu (İzoterm ve Termodinamik Analiz Çalışması)(Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi, 2020) Alacabey, İhsan; Kul, Ali Rıza; Ece, M. Şakir; Alkan, HüseyinSediment, nehirlerin, göllerin, koyların, haliçlerin ve okyanusların tabanında yer alan yeryüzü katmanıdır. Dünyanın en büyük soda gölü olması, eşine rastlanmayacak büyüklükte ve güzellikte dipten yükselen güncel karbonat sütunları içermesi ve su seviyesinde yaşanan değişimler, Van Gölü’nü dünyanın en ilginç göllerinden biri yapar. Bu çalışmada Van Gölünden alınan doğal sediment ve asitle (HNO3) aktive edilmiş sedimentlerin ağır metal (Cr3+) ile ilişkisi batch adsorpsiyon tekniği kullanılarak saptanmaya çalışılmıştır. Farklı konsantrasyonlardaki krom (Cr3+) iyonlarının ve pH’ın adsoprsiyon prosesi üzerine etkisi araştırılmıştır. Langmuir, Freundlich, Dubinin-Radushkevich (D-R) ve Temkin adsorpsiyon izotermleri hesaplanmıştır. Hem doğal sediment (DS) hem de asitle modifiye edilmiş sedimentin (MS) Langmuir adsorpsiyon izoterm modeline uyum sağladığı bulunmuştur. Bununla birlikte hem doğal adsorbent hem de asitle modifiye edilmiş adsorbentin termodinamik parametreleri hesaplanmış, ΔG° < 0 değerinin adsoprsiyon prosesinin kendiliğinden gerçekleştiğini göstermiştir. Doğal sedimentin yüzey alanı 7.512 m²/g, asit ile aktive edilmiş sedimentin yüzey alanı 79.456 m²/g tespit edilmiş olup aktivasyon işlemi ile çok yüksek bir yüzey alanı elde edilmiştir. Giles adsorpsiyon izoterm sistemine göre H tipi eğriye uyduğu görülmüştür.Article Citation - WoS: 12Citation - Scopus: 13Pumice Particle Interface: a Case Study for Immunoglobulin G Purification(Springer, 2021) Alacabey, Ihsan; Acet, Omur; Onal, Burcu; Dikici, Emrah; Karakoc, Veyis; Gurbuz, Fatma; Odabasi, MehmetCryogels with embedded natural adsorbent are new trend of chromatographic media for separation of biomolecules. In this report, experimental determination of immunoglobulin G (IgG) purification by Cu2+-attached pumice particles unified cryogel (Cu2+-PPUC) was performed. For this purpose, after preparation of Cu2+-attached pumice particles, they were unified with 2-hydroxyethyl methacrylate monomers to produce Cu2+-PPUC through polymerization of gel-forming precursors at subzero temperatures. IgG separation experiments were accomplished in a continuous column system. The highest binding capacity (596.8 mg/g) was obtained by working with 0.02 M phosphate buffer at pH 6.0. The chemical analysis of pumice was examined by X-ray fluorescence spectrometer. Scanning electron microscopy was performed to identify the morphology of Cu2+-PPUC. Langmuir adsorption model was best fitted to interaction when compared to Freundlich model. Temkin model was utilized to characterize adsorption, energetically. Purification ability of Cu2+-PPUC for IgG was shown with high selectivity via reducing SDS-PAGE electrophoresis.
