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Öğe Activation of pine cone using Fenton oxidation for Cd(II) and Pb(II) removal(ELSEVIER SCI LTD, 2008) Argun, Mehmet Emin; Dursun, Sukru; Karatas, Mustafa; Guru, MetinThis paper describes activation of pine cone with Fenton reagent and determines the removal of Cd(II) and Pb(II) ions from aqueous Solution. Changes of the Surface properties of adsorbent materials were determined by the FT-IR and SEM analysis after activation of pine cone. The effect of Fe2+/H2O2 ratio, ORP, pH and contact time were determined. Different adsorption isotherms were also obtained using concentrations of heavy metal ions ranging from 0.1 to 150 mg L-1. The adsorption process follows pseudo-first-order reaction kinetics and follows the Langmuir adsorption isotherm. The study discusses thermodynamic parameters, including changes in Gibbs free energy, entropy, and enthalpy, for the adsorption of Cd(II) and Pb(II) on activated cone, and revealed that the adsorption process was spontaneous and exothermic under natural conditions. The maximum removal efficiencies were obtained as 91% and 89% at pH 7 with 90 and 105-min contact time for Cd(II) and Pb(II), respectively. (c) 2008 Elsevier Ltd. All rights reserved.Öğe Adsorption of Reactive Blue 114 dye by using a new adsorbent: Pomelo peel(ELSEVIER SCIENCE INC, 2014) Argun, Mehmet Emin; Guclu, Dunyamin; Karatas, MustafaThis paper describes the removal of Reactive Blue 114 dye from aqueous solutions by using pomelo (Citrus grandis) peel. Pomelo peel can be described as a new, low cost, abundantly available adsorbent. The optimum adsorbent mass, dye concentration, contact time and pH were determined in this study. The parameters of Langmuir, Freundlich and Temkin adsorption isotherms were also obtained using concentrations of the dyes ranging from 1.0 to 200 mg/L. Maximum adsorption capacity was obtained as 16 mg/g at pH 2 and 303 K solution temperature. The adsorption process was observed to be reaching equilibrium after about 90 min. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.Öğe Application of Fenton process for decolorization of reactive black 5 from synthetic wastewater: Kinetics and thermodynamics(WILEY, 2011) Argun, Mehmet Emin; Karatas, MustafaThe decolorization and degradation efficiency of the azo dye Reactive Black 5 (RB5) by Fenton system were investigated in this study. The operation parameters such as Fe2+:H2O2 ratio, pH value, initial concentration of RB5, reaction time, and temperature were examined. Maximum decolorization (99%) and degradation (88% COD removal) efficiencies were achieved at the Fe2+:H2O2 ratio of 0.05 and pH 3 for 15-min reaction time. The decolorization kinetic of RB5 followed pseudo-second-order reaction kinetic. The increase of temperature caused decreasing of obtained rate constants and increasing of corresponding half-lives. The article also discussed thermodynamic parameters including changes in Gibbs free energy, enthalpy, and entropy for the decolorization of RB5 by Fenton and exposed that the oxidation process was spontaneous and exothermic under natural conditions. (c) 2010 American Institute of Chemical Engineers Environ Prog, 2010Öğe Decolorization of antraquinonic dye, Reactive Blue 114 from synthetic wastewater by Fenton process: Kinetics and thermodynamics(ELSEVIER SCIENCE INC, 2012) Karatas, Mustafa; Argun, Yusuf Alparslan; Argun, Mehmet EminIn this work, the decolorization of C.I. Reactive Blue 114 (RB114), a commercially important anthraquinonic dye, by Fenton processes was investigated. The effects of operating parameters, such as Fe2+:H2O2 ratio, pH value, reaction time and temperature were examined. Maximum decolorization (86%) efficiencies were achieved at the Fe2+:H2O2 ratio of 0.1 and pH 3 for 20 min reaction time. The decolorization kinetic of RB114 followed pseudo-second-order reaction kinetic. The paper also discussed thermodynamic parameters including changes in Gibbs free energy, and activation energy for the decolorization of RB114 by Fenton and exposed that the oxidation process was spontaneous under natural conditions. (C) 2011 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.Öğe The Decolorization of Azo Dye Reactive Black 5 in a Sequential Anaerobic-Aerobic System(FOUNDATION ENVIRONMENTAL PROTECTION & RESEARCH-FEPR, 2010) Karataş, Mustafa; Dursun, Şükrü; Argun, Mehmet EminThe potential of the sequential anaerobic-aerobic system for decolorization of azo dye Reactive Black 5 (RB 5) was investigated in this study. The synthetic wastewater contained 150 mg/L dye and 3000 mg/L glucose- COD. An upflow anaerobic Sludge blanket (UASB) reactor and continuously stirred aerobic reactors (CSAR) were used to the remove color and COD. The methane gas production efficiencies were also investigated Under the anaerobic conditions. The UASB - CSAR were operated at different organic loading rates (OLR= 2.4-22.5 kg COD/m(3).day) and hydraulic retention times (HRT= 3.2-30.1 h). The COD removal efficiencies decreased from 61 to 36.7% with increases in organic loadings from 2.4 to 22.5 kg COD/m(3).day in the anaerobic UASB reactor. The color removals decrease from 99.8 to 90.7% when the HRT decreased from 30.1 to 3.2 hours. The methane production efficiencies obtained were 75 and 38.3% at the organic loading rates of 2.4 and 22.5 kg COD/m(3).day respectively, in the anaerobic reactor. The effects of both sludge retention times (SRT) and the food to mass (F/M) ratio oil the COD removal efficiencies was investigated in the aerobic reactor. COD removal efficiencies of 62.2 and 86.3% were obtained at 2 and 19 days SRT in the aerobic reactor. The COD removal efficiencies were found to be 86.3 and 62.2% at F/M ratios of 0.112 and 1.569 kgCOD/kgMLSS.day The color and COD removal efficiencies obtained were 99.8% and 95% by using 150 mg/L of RB 5 dye concentration in the sequential anaerobic-aerobic reactor.Öğe Decolorization of reactive dyes under batch anaerobic condition by mixed microbial culture(ACADEMIC JOURNALS, 2009) Karatas, Mustafa; Dursun, Sukru; Argun, Mehmet EminDecolorization of reactive dyes, which are used in textile industry, under batch anaerobic conditions by mixed microbial culture was investigated in this study. Decolorization of C.I. Reactive Black 5 (RB 5), C.I. Reactive Red 24 (RR 24) and C.I. Reactive Blue 49 (RB 49) with initial concentrations ranging from 150 to 2400 mg/L was investigated. Decolorization efficiencies obtained were 93.4% for RB 5 and 98.9% for RR 24 both with initial concentration of 2400 mg/L after 24 h incubation period. However, decolorization was lower for the dye of RB 49 than other two dyes in all concentrations despite 72 h incubation period by mixed anaerobic culture. All of the three dyes correlated with 1(st) order reaction kinetic with respect to decolorization kinetics. The results of the study demonstrated that high decolorization was obtained under anaerobic condition depending on chemical structure of the dye.Öğe Fenton oksidasyonu ile ilaç endüstrisi atıksuyundan koi gideriminin kinetik ve termodinamik değerlendirmesi(2017) Argun, Mehmet EminBu çalışmada, ilaç endüstrisi atık suyundan Fenton oksidasyonukullanılarak Kimyasal Oksijen İhtiyacı (KOİ) giderimi ile morötesi (UV)ve görünür bölgedeki absorbans değişimleri incelenmiştir. Oksidasyonreaksiyonu için kinetik ve termodinamik veriler hesaplanmıştır. Ayrıca,Fenton için belirlenen optimum dozda Foto-Fenton ve Sono-Fentonprosesleri de çalışılarak karşılaştırma yapılmıştır. İlaç endüstrisiatıksuyundan alınan numunelerin KOİ değerleri 2360-3930 mg/Laralığında bulunmuştur. Oksidasyon reaksiyonları için en uygunşartların sağlandığı optimum değerleri belirlemek için Fe(II) ve H2O2dozları, reaksiyon süresi ve sıcaklık parametreleri çalışılmıştır.Optimum Fe(II)/H2O2 oranı 1/5 olarak saptanmıştır. Fentonreaksiyonunun ilk 10 dakika içerisinde hızlı bir şekilde gerçekleştiği vedaha sonra yavaşlayarak 60 dakika içerisinde dengeye ulaştığıgözlenmiştir. İletkenlik, Oksidasyon/Redüksiyon Potansiyeli (ORP) vepH değerleri de izlenmiştir. Maksimum giderim verimleri Fenton için%79, Foto-Fenton için %90 ve Sono-Fenton için %86 olarak eldeedilmiştir. Fenton oksidasyonu ile ilaç endüstrisi atıksuyunun arıtılmasıişleminin yalancı ikinci derece kinetiğe uyduğu belirlenmiştir. Serbestenerji değişimi 283 K, 293 K, 313 K ve 333 K sıcaklıklarında sırası ile -4.6, -3.2, -0.9 ve -0.2 kJ/mol olarak elde edilmiştir. Fenton prosesininistemli olduğu ve ekzotermik özellik gösterdiği belirlenmiştir.Öğe Heavy metal adsorption by modified oak sawdust: Thermodynamics and kinetics(ELSEVIER SCIENCE BV, 2007) Argun, Mehmet Emin; Dursun, Sukru; Ozdemir, Celalettin; Karatas, MustafaThis paper describes the adsorption of heavy metal ions from aqueous solutions by oak (Quercus coccifera) sawdust modified by means of HCl treatment. Our study tested the removal of three heavy metals: Cu, Ni, and Cr. The optimum shaking speed, adsorbent mass, contact time, and pH were determined, and adsorption isotherms were obtained using concentrations of the metal ions ranging from 0.1 to 100 mg L-1. The adsorption process follows pseudo-second-order reaction kinetics, as well as Langmuir and D-R adsorption isotherms. The paper discusses the thermodynamic parameters of the adsorption (the Gibbs free energy, entropy, and enthalpy). Our results demonstrate that the adsorption process was spontaneous and endothermic under natural conditions. The maximum removal efficiencies were 93% for Cu(II) at pH 4, 82% for Ni(II) at pH 8, and 84% for Cr(VI) at pH 3. (c) 2006 Elsevier B.V. All rights reserved.Öğe Kimyasal olarak modifiye edilmiş adsorbanlar kullanarak ağır metal iyonlarının adsorpsiyonu(Selçuk Üniversitesi Fen Bilimleri Enstitüsü, 2007) Argun, Mehmet Emin; Dursun, ŞükrüBu tez çalışmasında Cd(II), Pb(II), Cu(II), Ni(II) ve Cr(VI) iyonlarının kimyasal olarak modifiye edilmiş ağaç malzemeleri (çam kabuğu, çam kozalağı ve meşe talaşı) kullanılarak adsorpsiyonu incelenmiştir. Ağır metal gideriminde modifikasyon metotlarının adsorpsiyon kapasitesini arttırıcı etkileri incelenmiştir. Modifikasyondan önce ve sonra ağaç malzemelerinin yapısı FTIR, SEM ve zeta potansiyeli analizleri ile belirlenmiştir. Modifikasyon işlemleri için HCl, NaOH, Fenton reaktifileri, polimerleştirme, aseton, etanol, kloroform, tetraetilen glikol, dietil eter ve glikol kullanılmıştır. Ayrıca, HCl, NaOH ve Fenton ile modifiye edilen ağaç malzemeleri ile kinetik, izoterm ve termodinamik çalışmalar yapılmıştır. Adsorpsiyon işlemlerinden sonra ağaç malzemelerinin tekrar kullanılabilirliğini belirlemek amacı ile rejenerasyon çalışmaları da yapılmıştır. Uygulanan modifikasyon işlemlerinin neden olduğu ilave maliyetler hesaplanmış ve klasik yöntemlerle karşılaştırılmıştır. Ham ağaç malzemelerinin arıtımda suya verdikleri Kimyasal Oksijen İhtiyacı 1030-1820 mg/L aralığında iken, bu değer modifiye adsorbanlarda 20-110 mg/L seviyelerine düşmüştür. Giderim verimleri ağır metal konsantrasyonu ile değişmekle birlikte %99'a kadar çıkmıştır. Adsorpsiyon kapasiteleri adsorban ve modifikasyon çeşidine göre 2 mg/g ile 100 mg/g arasında bulunmuştur. Sonuç olarak, ağaç malzemelerinin adsorpsiyon kapasitelerinin klasik adsorbanlarla rekabet edebilecek ölçüde olduğu ve atık sulardan ağır metallerin arıtımında ekonomik olarak kullanılabileceği ortaya çıkmıştır.Öğe Konya Ana Tahliye kanalının Çengilli Bölgesi Tarım Topraklarında ve Buğdayda Cu, Cr, Ni ve Pb Derişimlerinin Belirlenmesi(Selçuk Üniversitesi Fen-Edebiyat Fakültesi, 2007) Karataş, Mustafa; Göler, Ersin; Dursun, Şükrü; Özdemir, Celalettin; Argun, Mehmet EminAksulardaki agır metaller, zehirli olmaları nedeni ile çevre sagliği açısından oldukça Onemlidir. Ağır metalleri içeren at isular genellide enostrilerden kaynaklanmakta ya bir on animdan sonra yada hiç animadan kanalizasyon sistemine desarj edilmektedir. Ozellikle kanala desarj edilen aksulan Konya atiku ana tahliye kanali civarındaki çiftçilerin tarımda sulama amach kullanmalan le verimli topraklar kirlenmekte ve bitki kalitesi olumsuz yönde etkilenmektedir. Ar metaller gida zincirl yolu ile insanlara ve hayvanlara kadar ulaşarak toksik yapmaktadır Bu araştirma, Konya Ana Tahliye kanalinin Cengilli bölgesinde abksular ile sulanan arazilerdeki toprak ve bitkide agir metal birikmesinin tespiti amacı ile yapılmiştir. Alti aylık süre ile su, toprak numunesi ve uç aylık süre ile de bitki numunesi alinarak agir metal derişimi analizleri yapılmiştir. Araştırma sonucunda, topraktaki air metal derişimi kanal suyuna göre daha fazla olduğu, budday bitkisindeki agır metal derişimi ise toksik etki yapacak seviyeye ulaşmadigi tespit edilmiştirÖğe Konya/Selçuklu İlçesi Karbon Ayak İzinin Belirlenmesi(Selçuk Üniversitesi Mühendislik Fakültesi, 2019) Argun, Mehmet Emin; Ergüç, Refik; Sarı, YunusBu çalışmada, bir ürün, hizmet veya etkinlik için karbon ayak izinin göstergesi olarak atmosfere verilen karbondioksit gazının Konya/Selçuklu ilçesi için değerlendirilmesi yapılmıştır. Emisyon hesaplamalarında, Hükümetler Arası İklim Değişikliği Paneli (IPCC) tarafından önerilen ve Tier yaklaşımlarıyla belirlenmiş olan metodoloji kullanılmıştır. Hesaplamalar sonucunda Selçuklu ilçesinin 2015 yılı karbon ayak izi; 0,94 milyon ton CO2 olarak bulunmuştur. Sanayi kaynaklı emisyonlar hesaplamaya dahil edilmemiştir. Selçuklu ilçesinin karbon ayak izini oluşturan emisyonlar içerisinde, %56’lık oranla barınmadan kaynaklı emisyonlar başı çekmektedir. Ardından en büyük katkıyı %41 oranla ulaşım amaçlı enerji kullanımı vermektedir. En düşük emisyon kaynağı %3’lük oranla katı atıklardır. İlçede kişi başına 1,55 ton CO2, birim alan (km2) başına ise 457 ton CO2 emisyonu düşmektedir. Sonuçlar değerlendirildiğinde ilçenin karbon ayak izinin dünya ve Türkiye ortalamasına göre daha düşük olduğu görülmektedir. Ayrıca, ilçede gerçekleştirilen yoğun ağaçlandırma çalışmalarının yaklaşık olarak 612360 ton CO2'in tutulmasını sağladığı ve karbon ayak izinin düşmesine önemli katkı sağladığı ortaya çıkmıştır.Öğe Methane Production from Anaerobic-Aerobic Sequential System Treatment of Azo Dye Reactive Red 24(WILEY, 2011) Karatas, Mustafa; Dursun, Sukru; Argun, Mehmet EminThis study describes the treatment of azo dye Reactive Red 24 (RR 24) and methane production efficiency of anaerobic-aerobic sequential system. An upflow anaerobic sludge blanket and continuously stirred aerobic reactor were used to treat RR 24 dye. The effect of hydraulic retention time (HRT), organic loading rate, and sludge retention time ratio on the methane production percentage, color, and chemical oxygen demand (COD) removal was investigated. The sequential anaerobic-aerobic treatment of synthetic dye wastewater feed with 150 mg/L of RR 24 dye resulted in 100% color and 95.2% COD removal at 5.76-day HRT. The amount of methane produced in anaerobic reactor was 563 mL/day (80% methane in total gas) and 129 mL/day (55%) for organic loading of 2.52 and 23.53 kg COD/(m(3) day), respectively. (C) 2010 American Institute of Chemical Engineers Environ Prog, 30: 50-58, 2011Öğe A new approach to modification of natural adsorbent for heavy metal adsorption(ELSEVIER SCI LTD, 2008) Argun, Mehmet Emin; Dursun, SukruThis paper describes modification of a natural adsorbent with Fenton reagent and determines the removal of Cd(II) ions from aqueous solution. Changes of the surface properties of adsorbent materials were determined by the FT-IR analysis after the modification of pine bark. The effect of Fe2+/H2O2 ratio, ORP, pH, and contact time were determined. Different adsorption isotherms were also obtained using concentrations of Cd(II) ions ranging from 0.1 to 100 mg L-1. The adsorption process follows pseudo-first-order reaction kinetics and follows the Langmuir adsorption isotherm. The paper discusses thermodynamic parameters, including changes in Gibbs free energy, entropy, and enthalpy, for the adsorption of Cd(II) on modified bark, and revealed that the adsorption process was spontaneous and exothermic under natural conditions. The maximum removal efficiency obtained was 97% at pH 7 and with a 90-min contact time (for 3 5 mg L-1 initial concentration and a 2.5 g L-1 solid-to-liquid ratio). (C) 2007 Elsevier Ltd. All rights reserved.Öğe Optimization of landfill leachate oxidation at extreme conditions and determination of micropollutants removal(DESALINATION PUBL, 2017) Argun, Mehmet Emin; Alver, Alper; Karatas, MustafaThe advanced oxidation of macro- and micro-organic pollutants from the landfill leachate using the Fenton reaction was investigated. Central composite design with response surface methodology was applied to evaluate the interaction and relationship between operating variables (i.e., pH, reaction time, ferrous iron and H2O2 dosages) and to develop the optimum operating condition. Based on statistical analysis, quadratic models for the two responses (chemical oxygen demand [COD] and aromatic content [UV254]) proved to be significant with very low probability values (<0.001). The obtained optimum conditions were 1,755 mg/L Fe2+ and 26,422 mg/L H2O2 concentration, pH 3.72 and 99 min reaction time. The results obtained by the predicted model were 70, and 54% removal for COD and UV254, respectively, with optimum conditions. The predicted results fitted well with the results of the laboratory experiment. A wide range of analysis was conducted for micropollutants and some volatile organic compounds, pharmaceuticals, pesticides, plasticizers, polycyclic aromatic hydrocarbons and heavy metals were detected. Removal efficiencies of some micropollutants including bis(2-ethylhexyl)phthalate, anthracene, benzene hexachloride, dieldrin, diuron, chlorpyriphos and diclofenac were between 90% and 99% with Fenton oxidation at the optimum condition. It was also determined that heavy metals decreased as a result of co-precipitation after oxidation.Öğe Optimization of struvite precipitation for landfill leachate treatment(2018) Doğan, Selim; Aygün, Ahmet; Argun, Mehmet Emin; Esmeray, ErtuğrulSanitary landfill is the most preferred municipal solid waste disposal method. The production of highly polluted leachate is a major disadvantage of sanitary landfills. In this study, optimization of struvite precipitation to remove ammonium from landfill leachate was conducted by using Response Surface Methodology and central composite design. Optimum struvite precipitation conditions were determined based upon 11 runs performed in central composite design. A second-order polynomial functional model was fitted well to the results. The statistical analysis showed that two independent variables which are molar rates of Mg/N and N/P had significant effects on the ammonium removal efficiency. Maximum ammonium removal efficiency was 99.8% at a molar rate of 1.20 for Mg/N and 1.27 for N/P for a constant 9.2 pH value. The obtained results revealed that struvite used as pre-treatment in anaerobic process can be modelled by using response surface methodology. And also, response surface methodology can be used to optimize required ammonium removal efficiency for lower Mg/N and N/P molar ratio which affects the performance of pre-treatment method that designed for an anaerobic process having 300:5:1 ratio for COD/N/P.Öğe Performance investigation of a new solar desalination unit based on sequential flat plate and parabolic dish collector(TAYLOR & FRANCIS INC, 2017) Argun, Mehmet Emin; Kulaksiz, Ahmet AfsinA new systemcomposed of a sequential flat plate and parabolic dish solar collector was applied to enhance the solar desalination productivity. Heated saline water was desalinated using the evaporation/condensation principle and an effort was made to achieve higher distillate production compared to previous studies. Desalination efficiency values were calculated between 23% and 57%. Maximum desalinated water productions were obtained as 1,038mL/m(2). h in autumn and 1,402 mL/m(2). h in summer. The cost of solar desalination system was found as economically feasible with 3 years' payback period and the producedwater cost of 0.014 $/L. Physicochemical analyses revealed that as a result of the desalination process, salinity level decreased from 35.6% to 0.0-0.1%, chloride concentration decreased from 21,407 mg/L to 10 mg/L, and electrical conductivity decreased from 53.1 mS/cm to 0.11 mS/cm.Öğe Physico-Chemical Studies of Enamel Cover Industry Wastewater(ASIAN JOURNAL OF CHEMISTRY, 2009) Ozdemir, Celalettin; Karatas, Mustafa; Sahinkaya, Serkan; Argun, Mehmet EminThe enamel plating industry wastewater has a reputation for being a major pollutant. Plating has become a major industry and is one of the fastest growing sectors of the world economy. Enamel industry is typically associated with detrimental environmental effects. There was not exactly a study source of enamel cover wastewater and characteristics in Turkey. This study has been made for completing this subject and to solve available problems. To achieve the objectives of the study, the samples taken from metal plating wastewater, were analyzed in the laboratories. Waste-water produced plating unit in enamel have high chemical oxygen demand (394 mg L(-1)) and suspended solid (486 mg L(-1)) concentrations. In this study, physico-chemical properties were also evaluated in enamel plating industry wastewater. The optimum polielectrolyte dose with lime addition was determined as 1660 mgL(-1) in order to obtain 86 % COD, 94 % TSS removal effiency at pH 9.Öğe Removal of Cd(II), Pb(II), Cu(II) and Ni(II) from water using modified pine bark(ELSEVIER SCIENCE BV, 2009) Argun, Mehmet Emin; Dursun, Sukru; Karatas, MustafaThis paper describes the removal of Cd(II), Pb(II), Cu(II), and Ni(II) ions from aqueous solutions using chemically modified pine barks (Pinus nigra). In this article, effects of chemical modification methods on the adsorption capacity have been investigated. Changes of the surface properties were examined by the FTIR, SEM and zeta potential analyses. HCl, NaOH, Fenton reactive, polymerization, acetone, ethanol. chloroform, tetra ethylene glycol, diethyl ether and glycol were used for modification processes. Maximum adsorption capacities were obtained by modification with NaOH (13-20 mg/g), Fenton (12-17 mg/g) and polymerization (12-16.5 mg/g). These modification processes also decreased Chemical Oxygen Demand of water from 1820 mg/L for raw pine barks to 35 mg/L for NaOH modified barks. Adsorption capacities of adsorbents increased from 2 mg/g to 20 mg/g as a result of modification that accordingly increase adsorbent surface activity. (C) 2009 Elsevier B.V. All rights reserved.Öğe Treatment and alternative usage possibilities of a special wastewater: Nejayote(WILEY, 2018) Argun, Mustafa Samil; Argun, Mehmet EminNejayote is the wastewater of alkaline cooking process (nixtamalization) and contains high amount of organic agent. Alkaline cooking is a very old process used in processing the corn. This process improves some nutritional and technological properties of corn. However, direct delivery of postprocess occurred nejayote to the receiving environment bears a great deal of environmental risk. In addition, due to bearing the nutritional transport of the compounds found in nejayote, these compounds have the potential to be used for different purposes upon being separated from the nejayote. In this study, treatment of nejayote, pollutant content to be reduced by ecological alkaline cooking practices, and possibilities of alternative applications have been reviewed. Practical applicationsNejayote is a wastewater containing corn components such as germ parts, pericarp, cellulosic structures, proteins, calcium, and endosperm and possesses environment polluting dry matter varying in the range of approximately 1-15%. Throughout alkaline cooking process, considerable amount of nejayote occurs. For this reason, the development of alkaline cooking practices with less polluting nature, the use of nejayote to be purified or to be used in other processes prior to be disposed bears great importance in terms of environmental health.Öğe TREATMENT OF MINERAL-OIL RECOVERY INDUSTRY WASTEWATER BY SEQUENTIAL AERATION AND FENTON'S OXIDATION PROCESS(GH ASACHI TECHNICAL UNIV IASI, 2010) Argun, Mehmet Emin; Karatas, Mustafa; Dursun, SuekrueThis study describes the treatment of preliminary aerated mineral-oil recovery industry wastewater (MORIW) using Fenton's reagent. Application parameters such as Fe(2+) and H(2)O(2) concentration, pH value, reaction period, temperature, and sludge characteristics were examined. Maximum oxidation efficiency (about 90% COD removal and 80% UV(254) removal) was achieved at the conditions of 0.003 Fe(2+):H(2)O(2) ratio, 180 min reaction period, pH 3 and 293 K temperature. The oxidation process of MORIW followed pseudo-second-order reaction kinetic. The studied sludge character has a high density with settling velocity. In addition, the high settlement rate (SR) and liquid/solid ratio (L/S) values demonstrated that the formed sludge was suitable for dewatering and drying processes.
