Sürdürülebilir Kalkınma Amaçları
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- ArticleYalnız künye2018The degradation of landfill leachate in the presence of different catalysts by sonolytic and sonocatalytic processes
Kocakaplan, Nihal; Ertugay, Neşe; Malkoç, Emine
In the study, the degradation of landfill leachate by single ultrasound (sonolytic) and sonolytic combined with Fe2+ and TiO2 catalysts was carried out in laboratory conditions. The effect of pH and ultrasonic wave amplitude was also investigated in terms of color removal, total organic carbon (TOC) and chemical oxygen demand (COD) from leachate by the sonolytic degradation process. In this process, the color removal efficiency was recorded as 81.81% at 620 nm, pH = 2.0 and 70% wave amplitude. The sonocatalytic degradation of landfill leachate accompanied by different catalysts was studied by using the 70% wave amplitude at pH = 2.0 and room temperature for 20 min. The sonocatalytic degradation of leachate by using Fe2+ and TiO2 was found to be significantly higher than sonolytic degradation (p < 0.05). As the Fe2+ concentration increased from 1.0 to 3.0 mg/L, the COD and color removal of leachate significantly decreased (p < 0.05) from 50 to 35.7% and from 95.5 to 90.9%, respectively. The experimental data obtained from sonocatalytic degradation was analyzed using the Behnajady–Modirshahla–Ghanbery (BMG) kinetic models and found to be compatible. The results showed that the combination of catalyst and sonolysis was a highly effective way to remove color, COD and TOC from landfill leachate.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2017The Effect of ZVI and H2O2 Concentrations on Chemical Oxygen Demand and Color Removal With Fenton-Like Process From Leachate
Ertugay, Nese; Kocakaplan, Nihal; Malkoç, Emine
Leachate are difficult to treat due to their complex structures and having high pollutants concentrations. In this study; color and chemical oxygen demand (COD) removal were studied from the leachate by Fenton-like oxidation. The effect of zero -valent iron (ZVI) and H2O2 concentrations on color and COD removal was investigated. The color removal was conducted at three different wavelengths of 436, 525 and 620 nm, respectively. The highest COD (74.4%) and color removal (71% at 436 nm, 80.3% at 525 nm and 87.9% at 620 nm) were determined at concentration of 0.05 g/L ZVI. Increasing of H2O2 concentration up to 200 mg/L also increased color and COD removal. Optimum values were 0.05 g/L and 150 mg/L for ZVI and H2O2 at a reaction time of 20 minutes and pH=2.0 and total organic carbon (TOC) removal was also determined at about 50%.
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2017Investigation of pH effect by Fenton-like oxidation with ZVI in treatment of the landfill leachate
Ertugay, Neşe; Kocakaplan, Nihal; Malkoç, Emine
In this study, effect of pH by Fenton-like with zero-valent iron (ZVI) process, advanced oxidation process in the leachate treatment, was investigated. The effect of pH value on colour and COD removal from leachate was determined at five initial pH values, 2.0, 2.5, 3.0, 3.5 and 4.0 (ZVI = 0.05 g/L, H2O2 = 150 mg/L). The highest colour and COD yield were obtained at pH 2.0. The colour removal was 87.9% (in 620 nm wavelength) and the COD removal was 74%. Experimental data from COD degradation with the Fenton-like process were analysed by using the zero-, first-, second-order and BMG kinetic models.
RDL Kalıcı Kaydıİncele - Conference ObjectYalnız künye2016The removal of COD and color by Fenton oxidation from leachate of Erzurum municipal solid waste landfill
Kocakaplan, Nihal; Ertugay, Neşe; Malkoç, Emine; Aslan, I.; Polat, K.; Bayrak, Y.; Ekinci, A.; Dadasoglu, F.; Turkoglu, E.A.; Akdemir, A.O.
The optimal conditions for treatment of leachate were determined as pH = 2.5, Fe2+= 2mg/L and H2O2= 100mg/L. Under the optimal conditions, approximately 90% color (at 620nm), 84% color (at 525nm), 74% color (at 436nm) and 47.8% COD removal efficiency from leachate were achieved after 20min of reaction. Depending on the results obtained experiments, Fenton process has been used successfully in removal of COD and color in landfill leachate.
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