Alacabey, İhsan

Alacabey, İhsan

Name Variants

Alacabey, Ihsan

Job Title

Doçent

Email Address

ihsanalacabey@hotmail.com

Main Affiliation

Department of Medical Services and Techniques / Tıbbi Hizmetler ve Teknikleri Bölümü

Scholarly Output

13

Articles

11

Citation Count

399

Supervised Theses

1 Scholarly Output Search Results

Now showing 1 - 10 of 12

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, Hüseyin
Sediment, 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.
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, Orhan
Hazelnut 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.
Removal of 17β-estradiol from aqueous systems with hydrophobic microspheres
(Journal of Polymer Engineering, 2021) Alacabey, İhsan; Kireç, Osman; Alkan, Hüseyin; Erol, Kadir
Sub-microparticles have many applications in different fields today. In this study, it is aimed to develop hydrophobic microparticles as an alternative to existing methods and to determine the 17β-estradiol adsorption performance of this adsorbent to purify the 17β-estradiol hormone which is found as an endocrine disruptor in environmental waters with high capacity and low cost. In this study, L-phenylalanine containing Poly(HEMA-MAPA) microparticles were synthesized by microemulsion polymerization and used as adsorbent. Microparticles were characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM) methods. The size of the Poly(HEMA-MAPA) microparticles used was measured as 120-200 nm. Specific surface area and elemental analysis studies were also conducted. While the surface area of the particles was found to be a very high value of 1890 m2/g, the amount of incorporation of MAPA into the polymeric structure was calculated as 0.43 mmol/g. Adsorption studies were carried out in the batch system under different ambient conditions (17β-estradiol concentration, temperature, ionic intensity). The adsorption capacity of Poly(HEMA-MAPA) microparticles was calculated to be 98.4 mg/g. Isotherm models for adsorption interaction were investigated deeply, and it was determined that the adsorption mechanism is suitable for Langmuir isotherm.
Reactive Blue 19 Adsorption on Activated Carbon from Pumpkin (Cucurbita Pepo) Seed Waste: Kinetic, Isotherm and Thermodynamic Studies
(Kauno Technologijos Universitetas, 2024) Alacabey, İhsan; Benek, Veysel; Teğin, İbrahim; Önal, Yunus; Erol, Kadir; Alacabey, İhsan
In this study, the removal of reactive blue 19 dyestuffs in aqueous systems was investigated by the adsorption method using activated carbon obtained from pumpkin seed waste. Activated carbon obtained from pumpkin seed waste functionalized with ZnCl2 was used as an absorbent. Pumpkin seed hydrochar was characterized by FT-IR, SEM, TGA-DTA, BET, and XPS. In the experimental stages, the adsorption equilibrium time was determined as 45 minutes, the adsorbent dosage was 0.8 g and the optimum pH was 6.0. After this step, the adsorption parameters of Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherms were investigated. It has been pointed out that the adsorption process fits better with the Freundlich isotherm model, and the adhesion occurs in a multilayered manner and on a heterogeneous surface. Freundlich and Dubinin-Radushkevich isotherms support that the bonding mechanism is realized by physical interactions. When the kinetic data were evaluated, adsorption mechanism was found to be compatible with the pseudo-second-order kinetic model. The thermodynamic parameters of adsorption indicate that the system is endothermic, and the adsorption of reactive blue 19 on activated carbon is a spontaneous process.
O-carboxymethyl chitosan Schiff base complexes as affinity ligands for immobilized metal-ion affinity chromatography of lysozyme
(ELSEVIER SCIENCE BV, 2018) Alacabey, İhsan; Baran, Talat; Erdönmez, Demet; Aksoy, Neşe Hayat; Alacabey, İhsan; Menteş, Ayfer; Odabaşı, Mehmet
We synthesized Ni2+-attached O-Carboxymethyl chitosan Schiff base complexes embedded composite cryogels (Ni2+-O-CMCS-CCs) by means of polymerization of gel-forming precursors at subzero temperatures. Prepared affinity cryogel showed excellent adsorption performance for lysozyme selected as model protein to test adsorption parameters, demonstrating an adsorption capacity of 244.6 mg/g (15.3 mg/g for Ni2+ minus O-CMCS-CCs), with fast adsorption equilibrium within 30 min and good reversibility. The performance of Ni2+-O-CMCS-CCs for lysozyme was also evaluated by SDS-PAGE, and a purification efficiency of 86.9% with 89.5% purification yield was determined. The swelling test, FT-IR, and SEM analysis were carried out for the characterization of Ni2+-O-CMCS-CCs. At the end of 35 adsorption-desorption cycles, there was no significant change in the adsorption capacity. (C) 2018 Elsevier B.V. All rights reserved.
Investigation of the effectiveness of waste nut shell–based hydrochars in water treatment: a model study for the adsorption of methylene blue
(SpringerLink, 2022) Demirel, Mehmet Ferit; Alacabey, İhsan; Alacabey, İhsan; Yabalak, Erdal
Thousands 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.
Antibiotic Removal from the Aquatic Environment with Activated Carbon Produced from Pumpkin Seeds
(Molecules, 2022) Alacabey, İhsan
Antibiotics 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 interaction
Adsorptive Removal Of Cationic Dye From Aqueous Solutions Using Bardakçı Clay
(2022) Alacabey, İhsan
This study was investigation employed the batch adsorption method using Bardakçı Clay/Van as an adsorbent to remove crystal violent, a cationic dye from an aqueous solution. The effects of pH, adsorbent amount, interaction time and concentration were investigated to determine the optimal adsorption conditions. The optimal adsorption conditions were determined to be pH=6, 0.6 g adsorbent amount, and the adsorption reached equilibrium at the 25th minute. The equilibrium isotherm was determined using the Langmuir, Freundlich and Dubinin–Radushkevich (D–R) adsorption equations. It was discovered to conform to the Langmuir isotherm. In the Dubinin-Radushkevich (D-R) model, the E value was calculated to E< 8 kJmol-1, indicating that the adsorption process occurs physically. Thermodynamic parameters such as enthalpy (ΔHo), Gibbs' free energy (ΔGo) and entropy (ΔSo) were calculated. The adsorption of crystal violet with Bardakçı clay demonstrated that the process was endothermic, occurring both physically and spontaneously.
Bıttım ve Menengiç Bitkilerinden Elde Edilen Aktif Karbon ile Sulu Çözeltilerden Karbofuran Giderimi
(2024) Alacabey, İhsan; Alacabey, İhsan
Pestisitler, gıda üretim ve verimini artırmak için tarım alanında yaygın olarak kullanılmaktadır, ancak yaygın kullanımı büyük çevresel kirlenmelere sebep olmaktadır. Tarım alanında pestisitlerin uzun zaman ve sürekli uygulanması, zararlı böcek, bakteri ve haşerelerin bu ilaçlara karşı dirençlerinin artmasına neden olmakta, bundan dolayı bir önceki yıla göre daha fazla miktarda pestisit kullanımı gerçekleşmektedir. Karbofuran kimyasal özellikleri kapsamında sistematik etkili intektisit, akarisit ve nematositler arasında bulunan en toksik karbamatlı birleşiktir. Son zamanlarda özellikle biyoteknoloji alanında ideal malzemelerin geliştirilmesinin gerekliliğinden dolayı Mardin ilinde yetişen Bıttım ve Siirt ilinde yetişen Menengiç bitkilerinden Potasyum hidroksit aktivasyonu ile aktif karbon üretilmiştir. Bu çalışmada, sulu çözeltiden karbofuranın uzaklaştırılması için adsorbent olarak aktif karbon batch adsorpsiyon yöntemiyle incelenmiştir. Optimum adsorpsiyon koşullarını bulmak için pH, adsorbent dozu, temas süresi, konsantrasyon etkisi araştırıldı. Langmuir, Freundlich ve Dubinin–Radushkevich (D–R) ve Temkin adsorpsiyon izoterm denklemleri uygulandı. Her iki adsorbent için Langmuir adsorpsiyon izotermine uyduğu bulunmuştur. Adsorpsiyonun tek tabakalı ve homojen olduğunu göstermektedir. Langmuir adsorpsiyon izoterm çalışmalarında Menengiç Aktif Karbonu için qmax 344.9 mg/g ve Bıttım aktif karbonu için qmax 380.4 mg/g adsorpsiyon kapasitesine sahip olduğu hesaplanmıştır. Dubinin-Radushkevich (D-R) modelinde E değeri < 8 kJ/mol olduğu hesaplanmıştır, bu da adsorpsiyon prosesinin fiziksel olarak gerçekleştiğini göstermektedir. Entalpi (ΔH0), Gibbs'in serbest enerjisi (ΔG0) ve entropi (ΔS0) gibi termodinamik parametreler hesaplandı. ΔG0 değerlerinin negatif çıkması hem Bıttım aktif karbonu hem de Menengiç aktif karbonu üzerindeki karbofuran adsorpsiyonun kendiliğinden gerçekleştiği göstermektedir. Her iki adsorbentin ΔH0 değerlerinin negatif olması prosesin ekzotermik olduğunu göstermektedir. Negatif ∆S0 değeri, karbofuran moleküllerinin, adsorbent yüzeyindeki adsorpsiyon sırasında katı/çözelti arayüzünde düzensizliğin azaldığı veya artan düzenlilik sergilediğini ve adsorpsiyon prosesinin, adsorban yüzeyindeki yeniden düzenlemeyi desteklediğini gösterir. Bıttım ve Menengiç bitkilerinden elde edilen aktif karbon ile sulu çözeltilerden karbofuran adsorpsiyon prosesinin ekzotermik olduğu, tek tabakada ve üniform olarak fiziksel mekanizma ile kendiliğinden gerçekleştiğini göstermiştir.
Magnetic diatomite for pesticide removal from aqueous solution via hydrophobic interactions
(Springer Link, 2019) Alacabey, İhsan; Yıldız, Emrecan; Alacabey, İhsan; Karabörk, Muharrem; Uzun, Lokman
Pesticides 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 limitations