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Electrokinetic soil remediation: Multiple anode electrode arrangement

Genç, Ayten | Türer, Dilek

Proceedings | 2005 | Proceeding of the 9th International Conference on Environmental Science and Technology Vol B - Poster Presentations

Electrokinetic remediation experiments of metal contaminated soils (Pb, Zn, Cu) were performed by constructing a multiple anode electrode arrangement. In this arrangement, the electrokinetic unit was cylindrical and had three sections. The central cylinder was selected as the cathode well to minimize the extent of the basic environment by the cathode and the outer cylinder was selected as the anode to maximize the spread of the acidic environment generated by the anodes. Nine identical graphite rods were used as electrodes and eight of them were the anodes. The anode electrodes were placed in octagonal with respect to the cathode el . . .ectrode. In the experiments, a constant potential difference of 250 volt was applied to the electrodes and maintained for about 30 hours. In order to determine the removal efficiencies of metals as a function of distance from the electrodes the soil was divided into four sections. The metal amounts in each section were evaluated by adding the metal amounts at different fractions of the soil (i.e., exchangeable, sorbed, carbonate, organic and residual) that were obtained from by using a sequential extraction method. Experimental results showed that metals that were present in different fractions of soil could be removed or redistributed in different fractions of soil by the help of electric field. Depending on the sequential extraction results, the overall removal efficiencies of lead, zinc and copper from the soil were evaluated as 29%, 18% and 18%. In order to identify effects of electrode geometry on efficiency the electrokinetic remediation experiment was repeated by using a parallel plate electrodes configuration. In this case, the electrokinetic unit was rectangular and two identical graphite plates were inserted into the electrode compartments as the anode and the cathode electrodes. For lead, zinc and copper, higher removal efficiencies were obtained; numerically, 32%, 37% and 31%, respectively. Even though in theoretical analysis, higher performance is expected from the multiple anode arrangement, the presence of inactive electric field areas in the soil could be the main cause for the decrease in the removal efficiency values Daha fazlası Daha az

Investigation of zonguldak coasts for coastal management

Özölçer, İsmail Hakkı | Yıldırım, Yılmaz | Büyüksalih, Gürcan | Çapar, Ömer Faruk | Öztürk, Berna

Proceedings | 2005 | Proceedings of the 7th International Conference on the Mediterranean Coastal Environment, MEDCOAST 20051 , pp.83 - 94

Zonguldak is located on the Northwest coast of Turkey on the Black Sea. The population of the city is 106 000 and it is a coastal city which has got natural beauty and econemically influenced coal and steal. Zonguldak region is confronted with problems of the coastal engineering and management from Eregli to Filyos province. Main problems are shipyards and filling area, uncontrolled solid waste area on the sea side, damages result from sea storm, and getting shallow and polluted basin and increasing of ship traffic at Zonguldak Harbor. At the Zonguldak coasts, pollution comes from domestic wastes and Çatalagzi Thermal Power Plant. I . . .n this study, these problems have been investigated from point of coastal management and suitable solutions are presented Daha fazlası Daha az

Changes in the slurry concentration during initial stages of filtration

Genç, Ayten | Tosun, İbrahim

Proceedings | 2007 | American Filtration and Separations Society - 20th Annual Conference and Exposition of the American Filtration and Separations Society 20071 , pp.340 - 350

The variation in slurry concentration within the filter chamber during the startup of constant pressure filtration experiments and its effect on the cake length and filtrate volume are studied. Theoretical equations relating slurry concentration to cake length and filtrate volume are developed by using the equations of continuity together with the jump conditions at the cake-slurry interface. Comparison with the experimental values indicates that the change in slurry concentration within the filter chamber, especially during the initial stages of filtration, should be taken into consideration in the evaluation of model parameters fr . . .om experimental data Daha fazlası Daha az

Adaptive neuro-fuzzy based method for daily estimation of SO2 concentration in city of Zonguldak

Yıldırım, Yılmaz | Bayramoğlu, Mahmut | Tecer, Lokman Hakan | Yalçın, Gültekin

Proceedings | 2004 | AIR POLLUTION MODELING AND ITS APPLICATION XVI16 , pp.559 - 567

Air pollution continues to be a major problem in many countries. Mathematical models are useful in relating emissions to air quality under a variety of meteorological conditions and source emission concentrations over an urban area. Meanwhile, the forecasting capability of sophisticated models is limited to very large and complex terrains. In this study, adaptive neuro-fuzzy logic method has been proposed to estimate the impact of meteorological factors on SO2 pollution levels. The model forecasts satisfactorily the trends in SO2 concentration levels, with performance between 78-90%.

Environmental knowledge of primary school students: Zonguldak (Turkey) example

Alaydın, Elif | Demirel, Gülçin | Altın, Süreyya | Altın, Ahmet


The number of environmentally conscious individuals in society can be raised by increasing environmental education quality in primary schools. Starting studies about environment in the childhood years is very important. In this study, the knowledge and skill levels of primary school students in Zonguldak about waste recycling was determined, and the participation levels of theirs into recycling activities was measured. For this aim, the third and fourth grade primary school students were identified as a target group of the study, and a questionnaire assessing the impact of the parents' socio-economic structures and education status . . .on environmental awareness of theirs was prepared. The results were evaluated to determine the strengths and weaknesses of environmental education of the students, statistically. The questionnaire was conducted in three elementary schools having different social and economic levels. Questions in the first, second and last parts of the questionnaire relate with the demographic characteristics of students families, the environmental awareness of the students, and the participation of students into recycling activities, respectively. The survey reviews were carried out with a statistical program and differences between the schools were determined by using one way ANOVA test. (C) 2014 The Authors. Published by Elsevier Ltd Daha fazlası Daha az

Environmental awareness level of secondary school students: A case study in Balikesir (Turkiye)

Altın, Ahmet | Tecer, Selcen | Tecer, Lokman | Altın, Süreyya | Kahraman, Bekir Fatih


In this study, secondary school students' awareness of environmental issues and problems and the level of their active participation in environmental activities have been identified, and the effects of some factors as family school and media on their environmental awareness and active participation have been investigated. The study was carried out in Balikesir city centre by conducting a survey on senior students consisting of 6 classes from three secondary schools which have different demographic and socio-economic levels. The results of the study showed a high level of environmental awareness among participant students. However, i . . .t is understood that environmental disclosures made in schools are insufficient and the participation level of students to environmental activities is low. Students rather gain experiences in the field of environment from mass media (i.e. audio, printed and visual media). It is revealed that female students have a higher level of environmental awareness and active participation level. In addition, when family income and family education level increases, environmental awareness and active participation level of students also increases. (C) 2014 Published by Elsevier Ltd Daha fazlası Daha az

Statistical modeling of winter air-pollution study in urban area of Sivas, Turkey.

Tecer, Lokman Hakan | Yılmaz, Ali | Yıldırım, Yılmaz

Proceedings | 2004 | AIR POLLUTION MODELING AND ITS APPLICATION XVI16 , pp.637 - 638

In this study air pollution level in the city center of Sivas for a 10 years' period was analyzed. Winter season' and annual averages of sulfur dioxide and particulate matter measurements have been carried out in central area of Sivas by City Health Management. Specifically the winter seasons' concentrations are presented and their causes and their change with respect to meteorological parameters are discussed. The statistical relations between pollutants and meteorological parameters have been found to be significant.

Comparison of separation processes for the treatment of emulsified oils from water

Candan, Köse | Genç, Ayten

Proceedings | 2015 | WATER RESOURCES MANAGEMENT VIII196 , pp.505 - 512

In this study, vacuum filtration, coagulation-flocculation, electrocoagulation and centrifugation were applied to separate emulsified oils from water. Two different types of cutting oils (BOR and EAL) were used in the preparation of oil emulsions. BOR has smaller oil droplets than EAL when they are mixed by water. It was not possible to separate BOR from water by microfiltration but 81.7% removal efficiency was obtained for EAL. Alum and ferric chloride were used as coagulants and optimum coagulant dosages, mixing time and pH were determined by performing jar tests. When alum was used as the coagulant, the removal efficiencies for B . . .OR and EAL were 90% and 98%, respectively. In the case of ferric chloride, 98% oil removal was obtained for both emulsions. However, the optimum ferric chloride dosages were much higher than alum. The optimum alum and ferric chloride dosages for BOR emulsion were 0.83 g/L and 6 mg/L, respectively. In the case of EAL emulsion, the corresponding amounts were 4 mg/L and 8 mg/L. The flocculation time was determined around 45 minutes. In order to obtain 98% BOR removal, the emulsion was centrifuged at an angular velocity of 3000 rpm after the coagulation-flocculation process. On the other hand, when BOR and EAL were separated by electrocoagulation, 95% removal rates can be obtained for both oils applying 40 V difference to the aluminum electrodes for 35 minutes. According to the removal efficiencies obtained from the experiments and the preliminary cost analysis it can be concluded that the best method for separating emulsified oils from waters is the electrocoagulation Daha fazlası Daha az

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