Yazar "Argun M.E." seçeneğine göre listele

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    The decolorization of azo dye Reactive Black 5 in a sequential anaerobic-aerobic system [Ardışık anaerobik - Aerobik sistemde Reaktif Siyah 5 azo boyasının renk giderimi]
    (Cevkor Vakfi, 2010) Karataş M.; Dursun S.; Argun M.E.
    The 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/m3.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/m3.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/m3.day respectively, in the anaerobic reactor. The effects of both sludge retention times (SRT) and the food to mass (F/M) ratio on 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.
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    Effect of NaOH on a natural adsorbent modification: Lead removal
    (2007) Argun M.E.; Dursun S.
    This paper describes removal of Pb(II) ions from aqueous solutions using NaOH modified pine barks (Pinus nigra). Chemical modification and its enhancement effect on adsorption capacity for heavy metal treatment process have been investigated in this article. Changes of the surface properties after modification were examined by the FT-IR analysis. Maximum adsorption capacity was 49 mg/g at pH 8 and during about 180 min contact time (for 35 mg/L initial concentration with 2.5 g/L solid-toliquid ratio) These modification processes also decreased soluble organic compounds from pine barks leading to increase in chemical oxygen demand in water. Adsorption capacities of adsorbents increased quietly as a result of modification according increase of adsorbent surface activity.
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    Industrial heavy metal pollution and hazardous effects on ecology: Waste management perspective
    (2006) Argun M.E.; Dursun S.; Özdemir C.; Karataş M.
    In this article, pollution of ecological systems with heavy metals and their hazardous effects were investigated as a view of waste management. Several industries from mining to electroplating produce large volumes of wastewater containing heavy metals. These wastewater cause accumulation of heavy metals through ecological circle in soil, plants and animals which directly enter human food chains presenting a high hazardous effect on consumers. They may cause severe damage of the kidney, reproductive system, liver, brain and central nervous system. Some of these heavy metals are Cd+2, Cu+2, Ni+2, Cr+6, Pb+2, Zn+2, As+2, and Hg+2. They also inhibit the biological treatment systems. These pollutants are special requirement for the disposal procedure. In this context heavy metal treatment processes have been also examined in this article. © 2006. International Scientific Conference SGEM.
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    Investigation of heavy metals in main wastewater system of Konya and determination of accumulation on soil and plants
    (2006) Karatas M.; Dursun S.; Ozdemir C.; Argun M.E.
    Heavy metals in wastewater are quite important because of being toxic effect for public health. Wastewaters that contain heavy metals are generally caused by industries discharged, either after primary treatment or even no-treatment farmers in Konya use wastewater for irrigation that discharged into canal. This causes soil pollution also decreases plant quality. Heavy metals can reach to humans and animals and causes toxic effects through food-chain. The aim of this study is determining heavy metal accumulation on soils and plants that were irrigated by Konya main sewage system waters. Water and soil samples have been taken and heavy metal concentration analysed for six months time period and three months for plant samples. As the result of this study, heavy metal concentration in soil was higher than canal water. Heavy metal concentrations in wheat dose not reach to toxic affect level. © 2006. International Scientific Conference SGEM.