Turan Yilmaz - Academia.edu (original) (raw)

Papers by Turan Yilmaz

Çukurova Üniversitesi Mühendislik Fakültesi Dergisi, Mar 29, 2022

Öz Bu çalışmada, Türkmenistan Cumhuriyeti'nde bulunan yüzeysel bir su kaynağından temin edilen do... more Öz Bu çalışmada, Türkmenistan Cumhuriyeti'nde bulunan yüzeysel bir su kaynağından temin edilen doğal suda bulanıklık ve kalsiyum parametrelerinin alkali koagülasyon metodu ile giderimi çalışılmıştır. Araştırma neticesinde %99 değerinde bulanıklık ve %33,50 değerinde kalsiyum giderimi elde edilmiştir. Ayrıca soda ilavesi ile kalsiyum giderim değeri %81'e çıkarılmıştır.

Bu çalışmada endüstriyel atıksularm anaerohik olarak arıulmasında hurda kağutan kağıt üreten hir ... more Bu çalışmada endüstriyel atıksularm anaerohik olarak arıulmasında hurda kağutan kağıt üreten hir fabrikanın atıksalar/ kullanılarak bir örnek çalışına gerçekleştirilmiştir. Çalışmada anaerohik reaktörlerin yer çek şartlar altında ki davranışlarının izlenebilmesi amacıyla özellikle yerçek kayıt endüstrisi atıksa farı kullanılmışın\\ Bu amaçla biri mezofilik (35 °C de) ve diğeri termofiiik (55 \"(\' de) olmak üzere iki adet anaerohik reaktör dizayn edilmiştir. Reaktörler tamamıyla aynı boyuna (I.II L) dizayn edilmiş ve çalışına şartlarının tamamıyla birbirinin aynısı olması sağlanmıştır. Buna göre KOI, A KM, NHÇ, pH, alkalinde ve biyoyaz (CH.ı ve CO 2 ) verimi gibi bazı temel parametreler takip edilerek reaktörlerin performansları karşılaştırılmaya çalışılmıştır. h\'İde edilen sonuçlara yöre hem mezofilik reaktör ve hem de termofiiik reaktör kağıt endüstrisi atıksıılarıııın arıtımında başarıyla kullanılmıştır. Ancak yüksek organik yükleme oranlarında termofiiik reaktörün performansının daha iyi olduğu gözlenmiştir. Reaktörlerin KOİ giderme verimi %70-S5 arasında değişmiş ve artan organik yükle azalmıştır

Çukurova Üniversitesi Mühendislik-Mimarlik Fakültesi Dergisi, 2003

Physicochemical Problems of Mineral Processing, 2016

In this paper dissolution of dolomite ore, collected from Mersin/Aydincik in Turkey, was investig... more In this paper dissolution of dolomite ore, collected from Mersin/Aydincik in Turkey, was investigated at various experimental conditions in the presence of HCl acid. Particle size, acid/dolomite ratio, solid/liquid ratio, stirring speed, reaction time and temperature were also conducted to the determin the optimum experimental conditions. During the experiment, CO2 amount released from the dolomite was measured through the experimental apparatus so as to the determination of reaction orders and rate constants of the sample at the different temperatures by using the fractional life approach method. It was found that, reaction orders and rate constants, based on temperatures, changed from 1.505 to 1.339 and between 3.17 and 10.49 10 -2 mol dm -3 sec -1 respectively. In addition, differences in reaction rate constants were examined with Arrhenius equation and the activation energy of the dissolution process was calculated as 16.69 kJ mol -1 , which was consistent with the activation en...

Water, Air, & Soil Pollution, 2021

This study aims to remove zinc by using banana peel from an aqueous medium. The peel was a lignoc... more This study aims to remove zinc by using banana peel from an aqueous medium. The peel was a lignocellulosic adsorbent and characterized by FTIR spectra, SEM–EDS images, and elemental analysis. The effect of contact time, pH, and adsorbent dosage on the sequestration of zinc was observed. The sorption process of zinc was well described with the pseudo–second-order kinetic and Langmuir isotherm model. The rate-limiting step to the adsorption process was determined by applying the intra-particle diffusion model. The removal mechanism is that ion exchange, electrostatic interaction, complex formation, physical adsorption, and precipitation carried out in cooperation with the banana peel functional groups and zinc ion in many ways. FTIR analysis demonstrates that the surface carboxylic/hydroxyl functional groups of banana peel play a key role in the adsorption of zinc ions. The results showed that banana peel, a locally available fruit residual, is an efficient and eco-friendly adsorbent to reduce Zn2+. The usage of banana peel as an adsorbent for the sequestering of zinc from water ensures both the technical advantage and cost-effectiveness of the sustainable environmental management concept and zero waste strategy. Furthermore, the value-added products containing organic compounds and zinc can be used efficiently as a soil conditioner.

Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi, 2021

Atıksu arıtma tesislerinden kaynaklanan arıtma çamurları, bertarafı ve yönetim maliyetleri bakımı... more Atıksu arıtma tesislerinden kaynaklanan arıtma çamurları, bertarafı ve yönetim maliyetleri bakımından tüm dünyada önemli bir sorun haline gelen atıklardır. Evsel atıksu arıtma tesislerinde, anaerobik stabilizasyon sonrası ortaya çıkan arıtma çamurları bu atıklar içerisinde önemli bir yer tutmaktadır. Son yıllarda arazide ve tarımda direk olarak kullanımı birçok ülkede kısıtlanan bu çamurlar için yeni bertaraf yöntemleri araştırılmaktadır. Kaynağı giderek tükenen fosfor elementinin arıtma çamurlarından geri kazanımı da son yıllarda önem verilen araştırma konularından bir tanesidir. Bu çalışmada anaerobik olarak stabilize edilmiş evsel atıksu çamuru, asidifikasyona tabi tutularak, sıvı fazdaki çözünmüş fosfor konsantrasyonu arttırılmıştır. Asidifikasyon ön işlemine tabi tutulan çamur santrifüj edilerek katı faz uzaklaştırılmıştır. Fosfor geri kazanımı için elde edilen sıvı faz 5 basamaktan oluşan ardışık kesikli reaktöre beslenerek, her basamakta farklı pH derecelerinde kireç ile çöktürme işlemine tabi tutulmuştur. pH 5, 6, 7, 8 ve 10 değerlerinde ayrı ayrı çalışan seri bağlı ardışık 5 reaktörde elde edilen çökeltilerin içeriği, reaktörlerde giderilen orto-fosfat (o-P), Zn, Fe, Al, Cr, Ca ve Mg konsantrasyonları açısından değerlendirilmiştir. Maksimum o-P geri kazanım verimi ve elde edilen fosfor içerikli üründe safsızlık oluşturan metal içeriğinin minimize edilmesi açısından optimum değer pH 6 olarak belirlenmiştir.

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi, 2019

Fosfor canlılar için temel bir nütrient olmasının yanı sıra sucul ortamlarda çok düşük konsantras... more Fosfor canlılar için temel bir nütrient olmasının yanı sıra sucul ortamlarda çok düşük konsantrasyonlarda ötröfikasyon adı verilen çevresel bir probleme sebep olmaktadır. Bu araştırmada ticari olarak satışı olan aktif karbon malzemesi demir ile kaplanarak sentezlenen yeni malzeme (DKK) ile fosfor giderimi araştırılmıştır. Yapılan laboratuvar çalışmaları sonucunda DKK'nın sulu çözeltilerde fosfor gideriminde işlevsel olarak kullanılabileceği anlaşılmıştır. Ayrıca malzemenin fosfor tutma kapasitesinin 4,26 mg PO 4 3-/g DKK olduğu tespit edilmiştir. Adsorpsiyonun Langmuir matematiksel modeline uyduğu ve üretim için uygun şartların sağlanması ile birlikte ticari olarak üretiminin gerçekleştirilerek fosfor gideriminde yaygın olarak kullanılabileceği sonucuna varılmıştır.

Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi, 2019

Bu çalışmada Adana ilinde faaliyet gösteren iki farklı tekstil endüstrisi atıksuyu ve Basic Blue ... more Bu çalışmada Adana ilinde faaliyet gösteren iki farklı tekstil endüstrisi atıksuyu ve Basic Blue 41, Basic Blue 3, Vat Green 1, Vat Blue 4, Direct Blue 71 ve Reactive Blue 29 boyarmaddelerini içeren sentetik olarak hazırlanmış çözeltilerde magnezyum flokülasyonunu çalışılarak geleneksel bir koagülant olan alüm ile karşılaştırılmıştır. Her iki koagülant için optimum doz çalışılmış olup magnezyum flokülasyonunda pH'ın etkisi araştırılmıştır. Magnezyum flokülasyonunda 11,5 pH değerinde daha etkili sonuç alındığı gözlenmiştir. Renk ve KOİ gideriminde ise magnezyum flokülasyonunun alümden daha etkili olduğu tespit edilmiştir. Ayrıca deneysel çalışma verileri Freundlich, Langmuir, Temkin ve Dubinin-Radushkevich adsorpsiyon izoterme modeline adsorpsiyon uyumunu tespit etmek için uygulanmış ve model sabitleri hesaplanmıştır. Modelleme çalışması sonucunda Renk ve KOİ gideriminde adsorpsiyonun da önemli etkisinin olduğu tespit edilmiştir.

CLEAN - Soil, Air, Water, 2018

Wastewater from dimethyl terephthalate (DMT) manufacturing was treated with weak base anionic res... more Wastewater from dimethyl terephthalate (DMT) manufacturing was treated with weak base anionic resin to remove acetic acid which causes inhibition during conventional biological treatment. The experimental results showed that the ion exchange process could be an effective approach for the pretreatment of DMT wastewater. At the resin dose of 70 g, the removal rate of acetic acid was found to be 86.5% at the equilibrium state. Some equilibrium and kinetic models were applied to the data obtained from the experiments. Among other models, the Freundlich isotherm was found to be the best-fitting model with a correlation coefficient (R 2) value of 0.981. In addition, the pseudo-second order kinetic model described the process better than the other kinetic models. The equilibrium and kinetic constants were calculated and the interactions between the acetate, the resin and the process conditions were determined.

Journal of Environmental Management, 2011

Chemical fractionation of seven heavy metals (Cd, Cr, Cu, Mn, Ni, Pb and Zn) was studied using a ... more Chemical fractionation of seven heavy metals (Cd, Cr, Cu, Mn, Ni, Pb and Zn) was studied using a modified three-step sequential procedure to assess their impacts in the sediments of the Seyhan River, Turkey. Samples were collected from six representative stations in two campaigns in October 2009 and June 2010, which correspond to the wet and dry seasons, respectively. The total metal concentrations in the sediments demonstrated different distribution patterns at the various stations. Cadmium was the only metal that was below detection at all stations during both sampling periods. Metal fractionation showed that, except for Mn and Pb, the majority of metals were found in the residual fraction regardless of sampling time, indicating that these metals were strongly bound to the sediments. The potential mobility of the metals (non-residual fractions) is reflected in the following ranking: Pb > Mn > Zn > Cu > Ni > Cr in October 2009 and Mn > Pb > Zn > Cu > Ni > Cr in June 2010. The second highest proportion of metals was bound to organic matter/sulfides, originating primarily from anthropogenic activities. Non-residual metal fractions for all stations were highest in June 2010, which may be linked to higher organic matter concentrations in the sediment samples with 1.40% and 15.1% in October 2009 and June 2010, respectively. Potential sediment toxicity was evaluated using the Risk Assessment Code (RAC). Based on RAC classification, Cd and Cr pose no risk, Cu and Ni pose low risk, Pb and Zn were classified as medium risk metals, while the environmental risk from Mn was high. In addition, based on the sediment quality guidelines (SQG), the Seyhan River can be classified as a river with no, to moderate, toxicological risks, based on total metal concentrations.

Environmental Technology, 2002

Water treatment works using coagulation/flocculation in the process stream will generate a waste ... more Water treatment works using coagulation/flocculation in the process stream will generate a waste sludge. The works in Adana, Turkey uses ferric chloride. The potential for using this sludge for the treatment of reactive, direct, disperse, acidic, and basic dyestuffs by coagulation and sorption has been investigated. The sludge acted as a coagulant and removed colour with excellent removal efficiencies being obtained for basic, disperse and direct dyes. The optimum conditions were a pH value of 5 and a sludge dose of 2000 mg l(-1). Mediocre results were obtained for acidic and reactive dyes. The efficiency of the sludge was also compared with alum and ferric chloride for the same group of dyes. The sludge was also used as a coagulant to treat the wastewater from a textile factory. At doses of 2000-4000 mg l(-1), the sludge was as effective as ferric chloride and alum at removing COD. Sorption tests showed that the disperse and reactive dyes did not bind to the sludge. Langmuir and Freundlich constants were determined for the other three types of dye. Rate constants for the adsorption were determined using the Lagergren equation.

Ecological Engineering, 2011

This study investigates the predictive ability of gene-expression programming (GEP) in the estima... more This study investigates the predictive ability of gene-expression programming (GEP) in the estimation of methane yield (Ym) and effluent substrate (Se) produced by two anaerobic filters. The modeling study was carried out using the data obtained from two upflow anaerobic filters – one mesophilic (35°C) and one thermophilic (55°C) – operated for the treatment of paper-mill wastewater under varying organic loadings. The GEP model was composed of three inputs, hydraulic retention time (Thr), organic loading rate (Rol), and influent substrate (Si), and one output, either Se or Ym. The Stover–Kincannon model was also used for data analysis and to evaluate the prediction ability. Three statistical criteria, root mean square error (RMSE), determination coefficient (R2), and Akaike's information criteria (AIC), were the means used for comparison. The results showed that the GEP approach predicted the performance of both anaerobic filters much better than the Stover–Kincannon model.

Desalination, 2010

Hydrochemical characterization of the Silifke Plain coastal aquifer was accomplished in this rese... more Hydrochemical characterization of the Silifke Plain coastal aquifer was accomplished in this research in order to investigate the water quality of groundwater. The aquifer is located along the Mediterranean coast and forms one of the most productive aquifers in Turkey. Groundwater samples were collected from the aquifer as monthly between December 2007 and November 2008 for 12months. Twenty one artesian

Desalination, 2010

Akyatan Lagoon, which is located on the Mediterranean coast of Turkey, is ecologically and econom... more Akyatan Lagoon, which is located on the Mediterranean coast of Turkey, is ecologically and economically important due to biological diversity, valuable fish species, and wildlife resources and the area has been declared as a wildlife protection area. The ...

CLEAN - Soil, Air, Water, 2011

In this study, batch experiments were carried out to investigate simultaneous growth of Spirulina... more In this study, batch experiments were carried out to investigate simultaneous growth of Spirulina platensis and removal of hardness in the Van Lake Water (VLW). Laboratoryscale studies showed ample Spirulina growth observed in VLW when exposed to light. Spirulina was the only algal specimen inoculated in the water during the study. VLW percentages were varied between 0.1 and 100% while pH values were 8.7-10.42 in the flasks. On a dry-weight basis the biomass concentration was 1.18 g L À1 at pH 10 after 17 days of incubation in the VLW. The increase of pH to above 10.38 associated with Spirulina growth resulted in the precipitation of hardness causing compounds while providing 70% hardness removal from the VLW medium. Experimental results indicated that the proposed method can be used to design batch systems for producing S. platensis and removal of hardness from the VLW.

CLEAN - Soil, Air, Water, 2011

The aim of this study was to assess the level of heavy metals (Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb, an... more The aim of this study was to assess the level of heavy metals (Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn) contamination and enrichment in the surface sediments of the Seyhan River, which is the receiving water body of both treated and untreated municipal and industrial effluents as well as agricultural drainage waters generated within Adana, Turkey. Sediment and water samples were taken from six previously determined stations covering the downstream of the Seyhan dam during both wet and dry seasons and the samples were then analyzed for the heavy metals of concern. When both dry and wet seasons were considered, metal concentrations varied significantly within a broad range with Al, 7210-33 967 mg kg À1 dw; Cr, 46-122 mg kg À1 dw; Cu, 6-57 mg kg À1 dw; Fe, 10 294-26 556 mg kg À1 dw; Mn, 144-638 mg kg À1 dw; Ni, 82-215 mg kg À1 dw; Pb, 11-75 mg kg À1 dw; Zn, 34-146 mg kg À1 dw in the sediments while Cd was at nondetectable levels for all stations. For both seasons combined, the enrichment factor (EF) and the geo-accumulation index (I geo) for the sediments in terms of the specified metals ranged from 0.56 to 10.36 and À2.92 to 1.56, respectively, throughout the lower Seyhan River. The sediment quality guidelines (SQG) of US-EPA suggested the sediments of the Seyhan River demonstrated ''unpolluted to moderate pollution'' of Cu, Pb, and Zn, ''moderate to very strong pollution'' of Cr and Ni. The water quality data, on the other hand, indicated very low levels of these metals suggesting that the metal content in the surface sediments were most probably originating from fine sediments transported along the river route instead of water/wastewater discharges with high metal content.

Çukurova Üniversitesi Mühendislik Fakültesi Dergisi, Mar 29, 2022

Öz Bu çalışmada, Türkmenistan Cumhuriyeti'nde bulunan yüzeysel bir su kaynağından temin edilen do... more Öz Bu çalışmada, Türkmenistan Cumhuriyeti'nde bulunan yüzeysel bir su kaynağından temin edilen doğal suda bulanıklık ve kalsiyum parametrelerinin alkali koagülasyon metodu ile giderimi çalışılmıştır. Araştırma neticesinde %99 değerinde bulanıklık ve %33,50 değerinde kalsiyum giderimi elde edilmiştir. Ayrıca soda ilavesi ile kalsiyum giderim değeri %81'e çıkarılmıştır.

Bu çalışmada endüstriyel atıksularm anaerohik olarak arıulmasında hurda kağutan kağıt üreten hir ... more Bu çalışmada endüstriyel atıksularm anaerohik olarak arıulmasında hurda kağutan kağıt üreten hir fabrikanın atıksalar/ kullanılarak bir örnek çalışına gerçekleştirilmiştir. Çalışmada anaerohik reaktörlerin yer çek şartlar altında ki davranışlarının izlenebilmesi amacıyla özellikle yerçek kayıt endüstrisi atıksa farı kullanılmışın\\ Bu amaçla biri mezofilik (35 °C de) ve diğeri termofiiik (55 \"(\' de) olmak üzere iki adet anaerohik reaktör dizayn edilmiştir. Reaktörler tamamıyla aynı boyuna (I.II L) dizayn edilmiş ve çalışına şartlarının tamamıyla birbirinin aynısı olması sağlanmıştır. Buna göre KOI, A KM, NHÇ, pH, alkalinde ve biyoyaz (CH.ı ve CO 2 ) verimi gibi bazı temel parametreler takip edilerek reaktörlerin performansları karşılaştırılmaya çalışılmıştır. h\'İde edilen sonuçlara yöre hem mezofilik reaktör ve hem de termofiiik reaktör kağıt endüstrisi atıksıılarıııın arıtımında başarıyla kullanılmıştır. Ancak yüksek organik yükleme oranlarında termofiiik reaktörün performansının daha iyi olduğu gözlenmiştir. Reaktörlerin KOİ giderme verimi %70-S5 arasında değişmiş ve artan organik yükle azalmıştır

Çukurova Üniversitesi Mühendislik-Mimarlik Fakültesi Dergisi, 2003

Physicochemical Problems of Mineral Processing, 2016

In this paper dissolution of dolomite ore, collected from Mersin/Aydincik in Turkey, was investig... more In this paper dissolution of dolomite ore, collected from Mersin/Aydincik in Turkey, was investigated at various experimental conditions in the presence of HCl acid. Particle size, acid/dolomite ratio, solid/liquid ratio, stirring speed, reaction time and temperature were also conducted to the determin the optimum experimental conditions. During the experiment, CO2 amount released from the dolomite was measured through the experimental apparatus so as to the determination of reaction orders and rate constants of the sample at the different temperatures by using the fractional life approach method. It was found that, reaction orders and rate constants, based on temperatures, changed from 1.505 to 1.339 and between 3.17 and 10.49 10 -2 mol dm -3 sec -1 respectively. In addition, differences in reaction rate constants were examined with Arrhenius equation and the activation energy of the dissolution process was calculated as 16.69 kJ mol -1 , which was consistent with the activation en...

Water, Air, & Soil Pollution, 2021

This study aims to remove zinc by using banana peel from an aqueous medium. The peel was a lignoc... more This study aims to remove zinc by using banana peel from an aqueous medium. The peel was a lignocellulosic adsorbent and characterized by FTIR spectra, SEM–EDS images, and elemental analysis. The effect of contact time, pH, and adsorbent dosage on the sequestration of zinc was observed. The sorption process of zinc was well described with the pseudo–second-order kinetic and Langmuir isotherm model. The rate-limiting step to the adsorption process was determined by applying the intra-particle diffusion model. The removal mechanism is that ion exchange, electrostatic interaction, complex formation, physical adsorption, and precipitation carried out in cooperation with the banana peel functional groups and zinc ion in many ways. FTIR analysis demonstrates that the surface carboxylic/hydroxyl functional groups of banana peel play a key role in the adsorption of zinc ions. The results showed that banana peel, a locally available fruit residual, is an efficient and eco-friendly adsorbent to reduce Zn2+. The usage of banana peel as an adsorbent for the sequestering of zinc from water ensures both the technical advantage and cost-effectiveness of the sustainable environmental management concept and zero waste strategy. Furthermore, the value-added products containing organic compounds and zinc can be used efficiently as a soil conditioner.

Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi, 2021

Atıksu arıtma tesislerinden kaynaklanan arıtma çamurları, bertarafı ve yönetim maliyetleri bakımı... more Atıksu arıtma tesislerinden kaynaklanan arıtma çamurları, bertarafı ve yönetim maliyetleri bakımından tüm dünyada önemli bir sorun haline gelen atıklardır. Evsel atıksu arıtma tesislerinde, anaerobik stabilizasyon sonrası ortaya çıkan arıtma çamurları bu atıklar içerisinde önemli bir yer tutmaktadır. Son yıllarda arazide ve tarımda direk olarak kullanımı birçok ülkede kısıtlanan bu çamurlar için yeni bertaraf yöntemleri araştırılmaktadır. Kaynağı giderek tükenen fosfor elementinin arıtma çamurlarından geri kazanımı da son yıllarda önem verilen araştırma konularından bir tanesidir. Bu çalışmada anaerobik olarak stabilize edilmiş evsel atıksu çamuru, asidifikasyona tabi tutularak, sıvı fazdaki çözünmüş fosfor konsantrasyonu arttırılmıştır. Asidifikasyon ön işlemine tabi tutulan çamur santrifüj edilerek katı faz uzaklaştırılmıştır. Fosfor geri kazanımı için elde edilen sıvı faz 5 basamaktan oluşan ardışık kesikli reaktöre beslenerek, her basamakta farklı pH derecelerinde kireç ile çöktürme işlemine tabi tutulmuştur. pH 5, 6, 7, 8 ve 10 değerlerinde ayrı ayrı çalışan seri bağlı ardışık 5 reaktörde elde edilen çökeltilerin içeriği, reaktörlerde giderilen orto-fosfat (o-P), Zn, Fe, Al, Cr, Ca ve Mg konsantrasyonları açısından değerlendirilmiştir. Maksimum o-P geri kazanım verimi ve elde edilen fosfor içerikli üründe safsızlık oluşturan metal içeriğinin minimize edilmesi açısından optimum değer pH 6 olarak belirlenmiştir.

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi, 2019

Fosfor canlılar için temel bir nütrient olmasının yanı sıra sucul ortamlarda çok düşük konsantras... more Fosfor canlılar için temel bir nütrient olmasının yanı sıra sucul ortamlarda çok düşük konsantrasyonlarda ötröfikasyon adı verilen çevresel bir probleme sebep olmaktadır. Bu araştırmada ticari olarak satışı olan aktif karbon malzemesi demir ile kaplanarak sentezlenen yeni malzeme (DKK) ile fosfor giderimi araştırılmıştır. Yapılan laboratuvar çalışmaları sonucunda DKK'nın sulu çözeltilerde fosfor gideriminde işlevsel olarak kullanılabileceği anlaşılmıştır. Ayrıca malzemenin fosfor tutma kapasitesinin 4,26 mg PO 4 3-/g DKK olduğu tespit edilmiştir. Adsorpsiyonun Langmuir matematiksel modeline uyduğu ve üretim için uygun şartların sağlanması ile birlikte ticari olarak üretiminin gerçekleştirilerek fosfor gideriminde yaygın olarak kullanılabileceği sonucuna varılmıştır.

Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi, 2019

Bu çalışmada Adana ilinde faaliyet gösteren iki farklı tekstil endüstrisi atıksuyu ve Basic Blue ... more Bu çalışmada Adana ilinde faaliyet gösteren iki farklı tekstil endüstrisi atıksuyu ve Basic Blue 41, Basic Blue 3, Vat Green 1, Vat Blue 4, Direct Blue 71 ve Reactive Blue 29 boyarmaddelerini içeren sentetik olarak hazırlanmış çözeltilerde magnezyum flokülasyonunu çalışılarak geleneksel bir koagülant olan alüm ile karşılaştırılmıştır. Her iki koagülant için optimum doz çalışılmış olup magnezyum flokülasyonunda pH'ın etkisi araştırılmıştır. Magnezyum flokülasyonunda 11,5 pH değerinde daha etkili sonuç alındığı gözlenmiştir. Renk ve KOİ gideriminde ise magnezyum flokülasyonunun alümden daha etkili olduğu tespit edilmiştir. Ayrıca deneysel çalışma verileri Freundlich, Langmuir, Temkin ve Dubinin-Radushkevich adsorpsiyon izoterme modeline adsorpsiyon uyumunu tespit etmek için uygulanmış ve model sabitleri hesaplanmıştır. Modelleme çalışması sonucunda Renk ve KOİ gideriminde adsorpsiyonun da önemli etkisinin olduğu tespit edilmiştir.

CLEAN - Soil, Air, Water, 2018

Wastewater from dimethyl terephthalate (DMT) manufacturing was treated with weak base anionic res... more Wastewater from dimethyl terephthalate (DMT) manufacturing was treated with weak base anionic resin to remove acetic acid which causes inhibition during conventional biological treatment. The experimental results showed that the ion exchange process could be an effective approach for the pretreatment of DMT wastewater. At the resin dose of 70 g, the removal rate of acetic acid was found to be 86.5% at the equilibrium state. Some equilibrium and kinetic models were applied to the data obtained from the experiments. Among other models, the Freundlich isotherm was found to be the best-fitting model with a correlation coefficient (R 2) value of 0.981. In addition, the pseudo-second order kinetic model described the process better than the other kinetic models. The equilibrium and kinetic constants were calculated and the interactions between the acetate, the resin and the process conditions were determined.

Journal of Environmental Management, 2011

Chemical fractionation of seven heavy metals (Cd, Cr, Cu, Mn, Ni, Pb and Zn) was studied using a ... more Chemical fractionation of seven heavy metals (Cd, Cr, Cu, Mn, Ni, Pb and Zn) was studied using a modified three-step sequential procedure to assess their impacts in the sediments of the Seyhan River, Turkey. Samples were collected from six representative stations in two campaigns in October 2009 and June 2010, which correspond to the wet and dry seasons, respectively. The total metal concentrations in the sediments demonstrated different distribution patterns at the various stations. Cadmium was the only metal that was below detection at all stations during both sampling periods. Metal fractionation showed that, except for Mn and Pb, the majority of metals were found in the residual fraction regardless of sampling time, indicating that these metals were strongly bound to the sediments. The potential mobility of the metals (non-residual fractions) is reflected in the following ranking: Pb > Mn > Zn > Cu > Ni > Cr in October 2009 and Mn > Pb > Zn > Cu > Ni > Cr in June 2010. The second highest proportion of metals was bound to organic matter/sulfides, originating primarily from anthropogenic activities. Non-residual metal fractions for all stations were highest in June 2010, which may be linked to higher organic matter concentrations in the sediment samples with 1.40% and 15.1% in October 2009 and June 2010, respectively. Potential sediment toxicity was evaluated using the Risk Assessment Code (RAC). Based on RAC classification, Cd and Cr pose no risk, Cu and Ni pose low risk, Pb and Zn were classified as medium risk metals, while the environmental risk from Mn was high. In addition, based on the sediment quality guidelines (SQG), the Seyhan River can be classified as a river with no, to moderate, toxicological risks, based on total metal concentrations.

Environmental Technology, 2002

Water treatment works using coagulation/flocculation in the process stream will generate a waste ... more Water treatment works using coagulation/flocculation in the process stream will generate a waste sludge. The works in Adana, Turkey uses ferric chloride. The potential for using this sludge for the treatment of reactive, direct, disperse, acidic, and basic dyestuffs by coagulation and sorption has been investigated. The sludge acted as a coagulant and removed colour with excellent removal efficiencies being obtained for basic, disperse and direct dyes. The optimum conditions were a pH value of 5 and a sludge dose of 2000 mg l(-1). Mediocre results were obtained for acidic and reactive dyes. The efficiency of the sludge was also compared with alum and ferric chloride for the same group of dyes. The sludge was also used as a coagulant to treat the wastewater from a textile factory. At doses of 2000-4000 mg l(-1), the sludge was as effective as ferric chloride and alum at removing COD. Sorption tests showed that the disperse and reactive dyes did not bind to the sludge. Langmuir and Freundlich constants were determined for the other three types of dye. Rate constants for the adsorption were determined using the Lagergren equation.

Ecological Engineering, 2011

This study investigates the predictive ability of gene-expression programming (GEP) in the estima... more This study investigates the predictive ability of gene-expression programming (GEP) in the estimation of methane yield (Ym) and effluent substrate (Se) produced by two anaerobic filters. The modeling study was carried out using the data obtained from two upflow anaerobic filters – one mesophilic (35°C) and one thermophilic (55°C) – operated for the treatment of paper-mill wastewater under varying organic loadings. The GEP model was composed of three inputs, hydraulic retention time (Thr), organic loading rate (Rol), and influent substrate (Si), and one output, either Se or Ym. The Stover–Kincannon model was also used for data analysis and to evaluate the prediction ability. Three statistical criteria, root mean square error (RMSE), determination coefficient (R2), and Akaike's information criteria (AIC), were the means used for comparison. The results showed that the GEP approach predicted the performance of both anaerobic filters much better than the Stover–Kincannon model.

Desalination, 2010

Hydrochemical characterization of the Silifke Plain coastal aquifer was accomplished in this rese... more Hydrochemical characterization of the Silifke Plain coastal aquifer was accomplished in this research in order to investigate the water quality of groundwater. The aquifer is located along the Mediterranean coast and forms one of the most productive aquifers in Turkey. Groundwater samples were collected from the aquifer as monthly between December 2007 and November 2008 for 12months. Twenty one artesian

Desalination, 2010

Akyatan Lagoon, which is located on the Mediterranean coast of Turkey, is ecologically and econom... more Akyatan Lagoon, which is located on the Mediterranean coast of Turkey, is ecologically and economically important due to biological diversity, valuable fish species, and wildlife resources and the area has been declared as a wildlife protection area. The ...

CLEAN - Soil, Air, Water, 2011

In this study, batch experiments were carried out to investigate simultaneous growth of Spirulina... more In this study, batch experiments were carried out to investigate simultaneous growth of Spirulina platensis and removal of hardness in the Van Lake Water (VLW). Laboratoryscale studies showed ample Spirulina growth observed in VLW when exposed to light. Spirulina was the only algal specimen inoculated in the water during the study. VLW percentages were varied between 0.1 and 100% while pH values were 8.7-10.42 in the flasks. On a dry-weight basis the biomass concentration was 1.18 g L À1 at pH 10 after 17 days of incubation in the VLW. The increase of pH to above 10.38 associated with Spirulina growth resulted in the precipitation of hardness causing compounds while providing 70% hardness removal from the VLW medium. Experimental results indicated that the proposed method can be used to design batch systems for producing S. platensis and removal of hardness from the VLW.

CLEAN - Soil, Air, Water, 2011

The aim of this study was to assess the level of heavy metals (Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb, an... more The aim of this study was to assess the level of heavy metals (Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn) contamination and enrichment in the surface sediments of the Seyhan River, which is the receiving water body of both treated and untreated municipal and industrial effluents as well as agricultural drainage waters generated within Adana, Turkey. Sediment and water samples were taken from six previously determined stations covering the downstream of the Seyhan dam during both wet and dry seasons and the samples were then analyzed for the heavy metals of concern. When both dry and wet seasons were considered, metal concentrations varied significantly within a broad range with Al, 7210-33 967 mg kg À1 dw; Cr, 46-122 mg kg À1 dw; Cu, 6-57 mg kg À1 dw; Fe, 10 294-26 556 mg kg À1 dw; Mn, 144-638 mg kg À1 dw; Ni, 82-215 mg kg À1 dw; Pb, 11-75 mg kg À1 dw; Zn, 34-146 mg kg À1 dw in the sediments while Cd was at nondetectable levels for all stations. For both seasons combined, the enrichment factor (EF) and the geo-accumulation index (I geo) for the sediments in terms of the specified metals ranged from 0.56 to 10.36 and À2.92 to 1.56, respectively, throughout the lower Seyhan River. The sediment quality guidelines (SQG) of US-EPA suggested the sediments of the Seyhan River demonstrated ''unpolluted to moderate pollution'' of Cu, Pb, and Zn, ''moderate to very strong pollution'' of Cr and Ni. The water quality data, on the other hand, indicated very low levels of these metals suggesting that the metal content in the surface sediments were most probably originating from fine sediments transported along the river route instead of water/wastewater discharges with high metal content.