http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Alper Erdem Yilmaz (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
-
Boron removal by means of chemical precipitation with calcium hydroxide and calcium borate formation
Alper Erdem Yilmaz,Recep Boncukcuoglu,Serkan Bayar,Baybars Ali Fil,Mehmet Muhtar Kocakerim 한국화학공학회 2012 Korean Journal of Chemical Engineering Vol.29 No.10
Boron removal was investigated by chemical precipitation from aqueous solutions containing boron using calcium hydroxide. pH, initial boron concentration, amount of Ca(OH)2, stirring speed and solution temperature were selected as operational parameters in a batch system. The highest boron removal efficiency was reached at pH 1.0. Increasing initial boron concentration and amount of calcium hydroxide raised to boron removal efficiency. Boron removal efficiency was highest at a stirring speed of 150 rpm. The most important parameter affecting boron removal efficiency was solution temperature. Increasing solution temperature increased importantly boron removal. XRD analysis showed that CaB3O3(OH)5·4H2O, which is a borate mineral called inyoite, occurred between Ca(OH)2 and borate ions. As a result of the obtained experimental data, when the optimum operational conditions were selected, over 96% of boron removal efficiency was reached by this method.
-
Alper Erdem Yilmaz,Baybars Ali Fil,Murat Tolga Yilmaz,Serkan Bayar,Zuhal Koksal The Korean Electrochemical Society 2024 Journal of electrochemical science and technology Vol.15 No.1
This work aims to investigate the efficiency of electrocoagulation (EC) of pistachio processing industrial wastewater (PPIW) using the continuous EC process. The tubular reactor made of stainless steel with an internal diameter of 60 mm was used as a cathode electrode. The effect of some parameters was examined on the removal of chemical oxygen demand (COD) and total phenols (TP) removal efficiency. The influences of the initial pH of wastewater (from 4 to 8), flow rate (from 25 to 125 mL/min), current density (from 7 to 21 mA/cm<sup>2</sup>), and supporting electrolyte type (NaCl, NaNO<sub>3</sub>, and Na<sub>2</sub>SO<sub>4</sub>), supporting electrolyte concentration (from 10 to 100 mg/L NaCl) on removal efficiency were investigated to determine the best experimental conditions. The examination of the physico-chemical parameters during the EC treatment showed that the best removal efficiency was obtained under conditions where the flow rate was 25 mL/min (20 min reaction time), the pH value was 5.2, and the current density was 21 mA/cm<sup>2</sup> has set. Under these experimental conditions, COD and TP removal efficiency were found to be 75% and 97%, respectively, while energy consumption was 18.5 kW h/m<sup>3</sup>. The study results show that the EC can be applied to PPIW pre-treatment.
-
DEDE SAGSOZ, Yesim,YILMAZ, Alper Erdem,EKMEKYAPAR TORUN, Fatma,KOCADAGISTAN, Beyhan,KUL, Sinan The Korean Electrochemical Society 2022 Journal of electrochemical science and technology Vol.13 No.2
In this study, electrochemical treatment of urban wastewater with electrical conductivity of 1000 μS cm<sup>-1</sup> and chemical oxygen demand of 250 mg L<sup>-1</sup> was investigated using the variables of initial pH value, current density and flow rate. Electrocoagulation was used, in which aluminum and stainless steel were selected, as the electrochemical treatment process. The electrocoagulation process was operated in continuous mode. The data obtained in experimental studies show that the best COD removal efficiency occurred in experiments where the initial pH value was 6. The increase in current density from 5 A to 15 A decreased the removal efficiency from 79 to 67%. The increase in flow rate under constant current density also reduced the efficiency of removal as expected. In experiments in which current density and flow rate were examined together, the increase in flow rate allowed the application of higher current densities. This situation led to considerable reductions in energy consumption values, even if the COD removal efficiency did not significantly increase. The high COD removal obtained with the use of high flow rate and high current density indicates that the electrocoagulation process can be used for high flow rate municipal wastewater treatment.
-
Adsorption of Ni(II) on ion exchange resin: Kinetics, equilibrium and thermodynamic studies
Baybars Ali Fil,Recep Boncukcuoglu,Alper Erdem Yilmaz,Serkan Bayar 한국화학공학회 2012 Korean Journal of Chemical Engineering Vol.29 No.9
This article describes the ion exchange of a heavy metal Ni(II) from aqueous solutions onto a Dowex HCR-S, cationic resin. Batch adsorption studies were conducted to evaluate the effect of various parameters such as pH, resin dose, stirring speed, temperature, contact time and initial Ni(II) concentration on the removal of Ni(II). Adsorption rate increased with the increase in initial nickel concentration, stirring speed and temperature. Equilibrium adsorption isotherms were measured for the single component system, and the experimental data were analyzed by using Langmuir, Freundlich, Elovich, Temkin, Khan, Sips, Toth, Koble-Corrigan and Radke-Prausnitz isotherm equations. The Sips equation appears to fit the equilibrium data. Different models were tested for their applicability. Adsorption kinetic data were modeled using the Lagergren pseudo-first-order, Ho’s pseudo-second-order and Elovich models. It was found that Ho’s pseudo-second-order model could be used for the prediction of the system’s kinetics. Thermodynamic activation parameters such as ΔG*, ΔS* and ΔH* of the adsorption of Ni(II) on Dowex HCR-S cationic resin were also calculated.
-
Baybars Ali, Fil,Cansu, Elgun,Sevim Alya, Cihan,Sermin, Gunaslan,Alper Erdem, Yilmaz The Korean Electrochemical Society 2022 Journal of electrochemical science and technology Vol.13 No.4
In the study, Ni<sup>2+</sup> (nickel) removal from synthetically prepared wastewater by electrocoagulation method, which is one of the electrochemical treatment processes, was investigated and parameters such as current density, pH, mixing speed, initial Ni<sup>2+</sup> concentration, supporting electrolyte type and concentration were determined to determine Ni<sup>2+</sup> removal efficiencies effects were studied. Experiment conditions during 30 minutes of electrolysis; the current density was determined as 0.95 mA/cm<sup>2</sup>, the initial pH of the wastewater was 6, the mixing speed was 150 rpm, and the initial nickel concentration was 250 mg/L. The Ni<sup>2+</sup> removal efficiency was obtained as 75.99% under the determined experimental conditions, while the energy consumption was calculated as 3.15 kW-h/m<sup>3</sup>. In the experiments, it was observed that the type and concentration of the supporting electrolyte did not have a significant effect on the Ni<sup>2+</sup> removal efficiency. In the trials where the effect of the support electrolyte concentration was examined, the Ni<sup>2+</sup> removal efficiency was 75.99% in the wastewater environment without the supporting electrolyte, while the Ni<sup>2+</sup> removal efficiency was 81.55% when 7.5 mmol/L NaCl was used after the 30-minute reaction, and the energy consumption was 2.15 kW-h/m<sup>3</sup> obtained as. As a result of the studies, it was concluded that the electrocoagulation process can be applied in the treatment of wastewater containing Ni<sup>2+</sup>.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
