İlknur Şentürk - Academia.edu (original) (raw)

Papers by İlknur Şentürk

Karadeniz Fen Bilimleri Dergisi

Bu çalışmada ilk etapta doğal (H-Zt), kimyasal şartlandırma yapılmış (KOH-Zt) ve şartlandırma son... more Bu çalışmada ilk etapta doğal (H-Zt), kimyasal şartlandırma yapılmış (KOH-Zt) ve şartlandırma sonrası Fe3O4 manyetik nanopartiküller ile yükleme yapılmış (KOH-Zt/Fe3O4) olmak üzere üç farklı klinoptilolit ile Cu(II) giderimi konsantrasyon ve pH’ya bağlı olarak araştırılmıştır. Ardından en iyi verim alınan adsorbent KOH-Zt ile çalışmalara devam edilerek, temas süresi, başlangıç metal konsantrasyonu, adsorbent dozajı ve sıcaklığın etkisi araştırılmıştır. KOH ile kimyasal şartlandırma işleminin Cu(II) gideriminde daha etkili olduğu, 30 mg/L Cu(II) konsantrasyonunda %77,61 giderim sağlandığı görülmüştür. Maksimum Cu(II) adsorpsiyon kapasitesi 50 mg/L Cu(II) konsantrasyonunda 8,91 mg/g’dır. Langmuir izoterm modelinin adsorpsiyon dengesini en iyi tanımladığı anlaşılmıştır. Adsorpsiyon kinetik verisi ikinci derece reaksiyon kinetiği ile uyumludur. Termodinamik hesaplar adsorpsiyonun kendiliğinden ve endotermik olduğunu göstermektedir. Çalışmadan elde edilen tüm veriler etkili ve ucuz bir a...

European Scientific Journal, ESJ, May 10, 2016

Aerobic biodegradability of the industrial wastewater (IW) containing high level of COD was asses... more Aerobic biodegradability of the industrial wastewater (IW) containing high level of COD was assessed in laboratory-scale batch reactors. Two experimental runs were carried out at a ratio of substrate-tomicroorganisms concentration S o /X o equal to 0,5 and 3,5 g COD /g MLVSS while equal to 1 ratio of synthetic wastewater to IW. Chemical oxygen demand, pH, and alkalinity were determined during the experiments. An increase in the influent substrate concentration not caused a decrease in COD removals at similar times of working. Since the inoculum was previously acclimatized to COD concentration, a substrate (mixture of the synthetic and industrial wastewater) inhibition at the higher concentrations of COD most probably was absent. It was found that a first-order kinetics adequately described the variation of COD removal with time. The values of the firstorder reaction constants were found to be 0,3083 and 0,2038 d-1 for Runs 1-2, respectively.

International Journal of Phytoremediation

SAÜ Fen Bilimleri Enstitüsü Dergisi, 2015

Geleceğin en önemli enerji taşıyıcısı olarak kabul edilen hidrojenin anaerobik fermantasyonla biy... more Geleceğin en önemli enerji taşıyıcısı olarak kabul edilen hidrojenin anaerobik fermantasyonla biyolojik yoldan elde edilmesinde ortam koşulları ve çalışma parametreleri oldukça önemlidir. Aşı mikroorganizma türü, pH, sıcaklık, kullanılan substrat, reaktörde oluşan H2'nin kısmi basıncı, fermantasyon işlemi sırasında oluşan son ürünler, reaktördeki azot ve fosfor konsantrasyonu, metal içeriği, reaktör içerisindeki karışımın HRT'si, kullanılan enzimler ve reaktör içerisindeki metabolik reaksiyonlar açığa çıkacak H2 verimini kuvvetle etkilemektedir. Sürekli sistemde H2 üretimine geçilmeden önce tüm bu parametreler için maksimum işletme koşulları belirlenmelidir. Çünkü çalışma koşullarındaki iyileşme biyohidrojen üretim verimini olumlu yönde etkileyecektir. Bu derleme makale gerekli en uygun çalışma koşullarını araştırmak ve bu koşullar hakkında detaylı bilgi vermek amacıyla hazırlanmıştır.

Journal of the Iranian Chemical Society

NATO Science for Peace and Security Series C: Environmental Security, 2013

ABSTRACT Biomass can also be used as a substrate for energy production, particularly for hydrogen... more ABSTRACT Biomass can also be used as a substrate for energy production, particularly for hydrogen production. By use of microorganisms, hydrogen can effectively be obtained from wood and marine biomass according to purposes. Biomass (i.e., organic matter) such as marine macro algae can be degraded biologically. The use of seaweeds as energy crops have certain advantages: the need for large land areas (which may not be available) is avoided; marine crop yields are expected to be considerably higher than land crop yields although experience from large-scale cultivation is lacking; seaweeds do not contain lignin, which is almost non-degradable under anaerobic conditions; and many valuable extracts, such as alginate, can be extracted from the waste, which is important to environmental protection. Recent research has shown that the red algae Gelidium amansii and the brown algae Laminaria japonica are both potential biomass sources for biohydrogen production through anaerobic fermentation. The objective of this review article is to give an overview of marine algae as a prospective source for biohydrogen production.

Regional Studies in Marine Science

Large quantities of waste activated sludge can be produced with the growth of wastewater treatmen... more Large quantities of waste activated sludge can be produced with the growth of wastewater treatment plants. Anaerobic technology allows to co-digestion of nutrient-rich and high COD-containing wastes. The aim of this study was to investigate the effects of anaerobic disintegration of wastewater treatment plant sludge (WS) and vegetable wastes (VW). Batch experiments were performed under mesophilic conditions (37 ± 1°C) and eleven different VW / WS ratios and methane production potentials were evaluated by standard BMP test. The logistic model and modified Gompertz model were used to estimate methane yield and evaluate kinetic parameters. It was shown that the systems more stabled where VW and WS are fragmented together Modified Gompertz model (R2: 0.884-0.999) showed a better fit to the test results. As a result, according to the characterization of the sludge from the wastewater treatment plant, it is recommended that the sludge be dried and evaluated as well as the integrated manag...

Korean Journal of Chemical Engineering

Pine sawdust, to which sulfuric acid was applied (APSD), was utilized as an inexpensive adsorbent... more Pine sawdust, to which sulfuric acid was applied (APSD), was utilized as an inexpensive adsorbent to perform the batch adsorptive removal from a synthetic dye solution of Maxilon Red GRL (MR GRL). The activated adsorbent was characterized by the points of zero charge, FTIR, N 2 adsorption-desorption, SEM, and SEM-EDX analyses. According to the removal results, the highest efficiency of the dye adsorption was reached at 180min. MR GRL removal of 99.35% was achieved using APSD under the optimum conditions (pH=5.7–6.0, temperature=298 K, dye concentration= 250mg/L, and adsorbent dosage=8 g/L). The Langmuir isotherm represents the best explanation model for the experimental data, which has the highest adsorption capacity of 312.5mg/g at 318 K. The compatibility of adsorption with the Langmuir isotherm showed that adsorption was reversible and physical. The other results obtained confirmed this situation. The kinetic research demonstrated that the sorption process was realized in accordance with the pseudo-second-order kinetic model. The thermodynamic parameters revealed that the MR GRL adsorption occurred spontaneously and was exothermic. The findings of the present research confirm that acid-activated pine sawdust may be utilized to remove MR GRL dye from aqueous solutions as a low-cost and efficient adsorbent.

Most of phenol compounds are recognized as organic contaminants in environmental systems (Bilgili... more Most of phenol compounds are recognized as organic contaminants in environmental systems (Bilgili, 2006). Phenols may occur in domestic and industrial wastewater, natural water, and potable water supplies during the chlorination of water and sewage, phenol is readily transformed into chlorophenols. Chlorinated organic compounds are a major source of pollution. Chlorophenols are used extensively in the manufacture of fungicides, herbicides, insecticides, pharmaceuticals, preservatives, glue, paint, fibers, leather, and as intermediates in chemical synthesis (Nadavala et al., 2009). Industrial sources of pollutants such as phenolic resin production (400 mg/L), refineries (50 mg/L), shale dry distillation (200 mg/L) and naphthalenic acid production (12 mg/L), etc. generate large quantities of phenols ( Hameed, 2008). These compounds impart unpleasant taste and odor even at low concentrations in water and can exert negative effects on different biological processes. Also they cause seri...

Bu calismanin amaci asidik bir boya olan Asit Viyolet 17 boyasinin adsorpsiyon kolonunda aritilab... more Bu calismanin amaci asidik bir boya olan Asit Viyolet 17 boyasinin adsorpsiyon kolonunda aritilabilirligini arastirmaktir. Tarimsal bir atik materyal olan Antep fistigi kabuklari asitle aktive edildikten sonra kolon dolgu materyali olarak kullanilmistir. Aktive edilen fistik kabuklarinin fizikokimyasal ozellikleri FTIR ve BET analizleri ile karakterize edilmistir. Hazirlanan adsorbanin adsorpsiyon kapasitesinin, BET yuzey alaniyla pozitif iliskili oldugu gorulmustur. Surekli sistem adsorpsiyon deneyleri, asitle aktive edilmis fistik kabugu ile doldurulan bir sabit kolonda gerceklestirilmistir. Secilen calisma parametrelerinin her biri icin, cikis suyu konsantrasyonunun giris konsantrasyonuna oranina (C t /C i ) karsilik belirli surelerde okunan degerler grafige gecirilerek kirilma egrileri cizilmistir. Kirilma egrisi verilerine gore secilen en iyi kosullarda (2 cm yatak yuksekligi, 6 mL/dk akis hizi ve 40 mg/L baslangic konsantrasyonu) elde edilen adsorpsiyon kapasitesi (q m ) 13,66...

Bu calismada, Antalya iline bagli onemli bir turizm ilcesi olan Alanya’da secilen pilot bir bolge... more Bu calismada, Antalya iline bagli onemli bir turizm ilcesi olan Alanya’da secilen pilot bir bolge icin gri su potansiyeli belirlenmistir.Secilen otel ve konutlardan elde edilen verilere gore gri su debisi hesaplanmistir. Gri sularin nelerden meydana geldigi, otel ve binalarda olusan gri su debisinin ortalama degeri, aritilacak olan gri suyun hangi amaclarla kullanilabilecegi arastirilip degerlendirilmistir. Incelenen otel ve binalar icin gunluk olusan gri su miktari sirasiyla 39 480 L (toplam su tuketiminin %40’i) ve 43 344 L (toplam su tuketiminin %51’i) dir. Gri su geri kazanimi ile su tuketiminde; otel icin %40, binalar icin %51 toplamda ise %45,5 verim elde edilecektir.

In this study, the effect of various design parameters on the removal of the Maxilon Red GRL dye,... more In this study, the effect of various design parameters on the removal of the Maxilon Red GRL dye, used in textile dyeing, in continuous system adsorption column was investigated using pine sawdust that were pre-treated with sulfuric acid. In each selected study parameter, the values read at certain times for the ratio of the output water concentration to the input concentration (Ct/Ci) were recorded into the graph and the breakthrough curves were drawn. The adsorption capacity (qm) obtained under the best conditions (10 cm bed height, 6 mL/min flow rate and 100 mg/L initial concentration) selected according to breakthrough curve data is 483.32 mg/g. In the latest stage, with a 0.4 M NaOH solution, the applicability of regeneration to the adsorbent bed was examined. The results of the study showed that the adsorbing capacity of the used adsorbent continued for another even after regeneration. Furthermore, the data obtained from the breakthrough curve was adapted to the Adams-Bohart, ...

Sustainable Chemistry and Pharmacy

Abstract In present study, pistachio shell was used as an adsorbent to remove Basic blue 41 dye (... more Abstract In present study, pistachio shell was used as an adsorbent to remove Basic blue 41 dye (BB 41) from textile wastewater effluents with a batch and a continuous system. The structure and characteristics of the pistachio shell were determined by pHpzc, FTIR spectroscopy, BET surface area and SEM-EDX analysis. A batch system was used to investigate the effects of dye concentration, pH, quantity and particle size of adsorbent, reaction duration, temperature and ion strength on dye removal performance were investigated. The error analysis methods were employed to get adsorption kinetics and the best-fitting isotherm models for adsorption of BB 41 dye. The results of modeling studies proved that Langmuir isotherms and pseudo-second-order kinetics the best represented adsorption kinetics and isotherm data. Present findings revealed that BB 41 removal was a feasible, spontaneous and endothermic process. Decreasing removal (%) rates were with increasing NaCl and SDS concentrations. After three cycles, regeneration efficiency was calculated as 65.39%. Continuous mode of operation was used for optimization of process parameters such as initial pollutant concentration, effluent flow rate and bed height. In continuous system, maximum adsorption capacity was identified as 41.77 mg/g. The Adams-Bohart, Thomas and Yoon-Nelson models were used to find of the best fitting model for experimental data of continuous mode of operation. Pistachio shell had yielded quite high adsorption of dye, thus it was also conduced that pistachio shell could effectively and reliably be utilized in treatment of wastewater effluents of textile industry containing Basic blue 41 textile dye.

Acta Chimica Slovenica

The pistachio shell was modified using different chemical agents and utilized as an adsorbent for... more The pistachio shell was modified using different chemical agents and utilized as an adsorbent for the adsorption of AV 17 dye in an aqueous solution. Maximum removal of 93.04% was obtained for pistachio shell activated with 10 N H 2 SO 4. The physicochemical properties of activated pistachio shell were characterized by pH pzc , FTIR, BET, and SEM-EDX analysis. The results showed that the AV 17 adsorption capacity was positively correlated to the BET surface area. The best fit of kinetic data to pseudo-second-order kinetic was determined. The adsorption follows both the Langmuir and Temkin isotherms. The Langmuir adsorption capacity was determined to be 26.455 mg/g at the initial dye concentration of 160 mg/L. The endothermic nature of adsorption was confirmed by the acquired thermodynamic data. Maximum desorption of 97.33% was achieved in 0.2 M NaOH for AAPS in the first cycle. This is very important for the economic use of the adsorbent. The findings demonstrate that activated pistachio shell may be a good alternative for color removal from industrial effluents.

OPUS Uluslararası Toplum Araştırmaları Dergisi

Son yillardaki teknolojik ilerlemenin kacinilmaz sonucu olarak, dunyada elektrikli ve elektronik ... more Son yillardaki teknolojik ilerlemenin kacinilmaz sonucu olarak, dunyada elektrikli ve elektronik esya tuketimindeki artis, atik elektrikli ve elektronik esya (AEEE) problemini de beraberinde getirmistir. Bu atiklar yapisinda toksik madde barindirdigi ve buyuk alanlari isgal ettigi icin, AEEE problemi bizim dusundugumuzden cok daha buyuktur. Gunumuzde saglikli kosullar altinda e-atiklar icindeki agir metalleri geri kazanmak ve geri donusumunu saglamak cevre ve insan sagligi icin oldukca onemlidir. Bu noktada hem ureticiler hem de tuketicilerin daha duyarli davranmasi ve konu hakkinda bilgilendirilmesi gerekir. Bu calisma, Sivas il merkezinde yasayan halkin elektrikli ve elektronik atiklarindan kurtulma yontemi konusundaki tuketici davranislari, e-atiklar konusundaki bilinc duzeyi ve tutumlarinin belirlenmesi icin yapilmistir. Sivas merkezde ikamet eden 100 kisi basit rastgele ornekleme yontemine gore secilmis ve bireylere yuz yuze anket teknigi uygulanmistir. Ankete katilan bireylerin %23’u ile sokakta, %42’si ile evde, %35’i ile isyerlerinde gorusulmustur. Katilimcilarin cogu AEEE yani e-atik tehlikesinin farkindadir ancak bu atiklardan kurtulmak icin uygun yontemin ne oldugunu bilmemektedir. Bu nedenle tuketicilerin, e-atiklarini ne yapmalari konusunda bilgilendirilmesi ve e-atiklarini yonetmelige uygun olarak atmalari konusunda motive edilmeleri gerekmektedir. Konu hakkinda tuketiciler bilgilendirildigi takdirde halkin elektrikli ve elektronik esya atiklarinin geri donusumu konusunda destek olacaklari anlasilmaktadir.

Afyon Kocatepe University Journal of Sciences and Engineering

Anahtar kelimeler Alanya ilçesi, Gri su, Geri kazanım ve tekrar kullanım, Gri su debisi hesabı Öz... more Anahtar kelimeler Alanya ilçesi, Gri su, Geri kazanım ve tekrar kullanım, Gri su debisi hesabı Özet Bu çalışmada, Antalya iline bağlı önemli bir turizm ilçesi olan Alanya'da seçilen pilot bir bölge için gri su potansiyeli belirlenmiştir.Seçilen otel ve konutlardan elde edilen verilere göre gri su debisi hesaplanmıştır. Gri suların nelerden meydana geldiği, otel ve binalarda oluşan gri su debisinin ortalama değeri, arıtılacak olan gri suyun hangi amaçlarla kullanılabileceği araştırılıp değerlendirilmiştir. İncelenen otel ve binalar için günlük oluşan gri su miktarı sırasıyla 39 480 L (toplam su tüketiminin %40'ı) ve 43 344 L (toplam su tüketiminin %51'i) dir. Gri su geri kazanımı ile su tüketiminde; otel için %40, binalar için %51 toplamda ise %45,5 verim elde edilecektir.

Gümüşhane Üniversitesi Fen Bilimleri Enstitüsü Dergisi

Su kaynaklarinin hizla tukenmesi, kuresel isinma, sehirlerde giderek artan hava kirliligi ve doga... more Su kaynaklarinin hizla tukenmesi, kuresel isinma, sehirlerde giderek artan hava kirliligi ve dogal kaynaklarimizin gun gectikce daha da tukenmesi hizla gelisen yapi ve insaat sektorunde cevre dostu ekolojik binalarin tasarlanmasini gundeme getirmistir. Zaman icinde cevre dostu bina yapimina ilgi giderek artarken, yesil bina olarak tanimlanan yeni yapilar ortaya cikmistir. Yesil, ekolojik, iklim ve cevre dostu, sifir karbon salinimli, yuksek performansli gibi degisik etiketler tasiyan binalar hizla gundemimize girmektedir. Bu calismada, Samsun iline bagli Karabahce koyunde bulunan bir konutun gayrimenkul sektorundeki cevreci gelismeler ile birlikte surdurulebilirlik kavrami temel alinarak yesil bina kavramina uygun olarak tasarlanmasi icin gerekli adimlar incelenmistir. Secilen konut uzerinde yesil bina gerekliliklerini saglayacak sekilde incelemeler yapilmis ve konutta yapilmasi gereken duzenlemeler ortaya konulmustur. Konutta su yonetimi on plana cikarilarak suyun daha verimli kullanilabilmesi ve enerji verimliligi icin yapilabilecek uygulamalara yonelik onerilerde bulunulmustur.

Desalination and Water Treatment, 2015