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    The application of Fe0/H2O2 for color removal
    (2008) Sahinkaya S.; Aygun A.; Sevimli M.F.
    The decolorization of C.I. Reactive Orange 36 (RO 36) by using Fenton-like process (Fe0/H2O2) was studied. Batch experiments were carried out for investigation of optimum operational conditions such as pH, H2O2 and Fe0 (iron powder) dosages. The results show that Fenton-like process is an efficient process to remove color from synthetic textile wastewater including RO 36 and polyvynil alcohol (PVA). The optimal conditions were experimentally determined and it was found to be initial pH = 3, [H2O2] = 50 mg/L, [Fe0] = 50 mg/L for [RO 36] = 50 mg/L at room temperature. Under optimal conditions, 94.4% degradation efficiency of dye in aqueous solution was achieved after 60 min of reaction.
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    Road traffic noise in the city of konya modelling using by GIS
    (2006) Sahinkaya S.; Ozdemir C.; Yakar M.
    Noise is defined as unwanted sound and one of the threatening factors for human health. Noise effects on human health psychological, physiological and mentally such as interference with communication, hearing loss, sleep disturbance, stress, annoyance, effects on performance. Road traffic is one of the most important noise sources in residental areas. Subsource of the road noise are engine noise, tyre/road noise and aerodynamic noise. The level of noise from traffic is correlated with the traffic flow rate, the speed of the vehicles, and the proportion of heavy vehicles, which, together with motorcycles, tend to be about twice as loud as motor cars. The aim of this study is road traffic noise modelling and visualization based on GIS as a noise map. The noise maps are important to determine whether noise levels due to the roadway exceeds admissible levels according to Turkish Noise Regulation or not. The needed datas for noise map of road traffic were obtained from measurements along the Konya - Istanbul motorway. Road traffic noise was measured at different points on main road, where traffic flow is free, in the morning hours between 07.00 - 09.00, at noon hours between 11.00 - 14.00, in evening hours between 16.00 - 18.00 and at night hours between 22.00 - 24.00. The measured datas were included traffic volume and combination, the average speed of each type of vehicles, physical conditions of roadway, number of lanes, lane, shoulder and median width for main carriageway. The total traffic noise was analyzed from traffic volume of all vehicles types on both sides of mainroad. Noise propagation calculations were made by a developed visual basic application in the present study. Traffic noise model used in this study was developed by the US's Federal Highway Administration (FHWA). Geographical Information Systems (GIS) play an important role in noise mapping. An appropriate use of GIS in mapping noise effects makes it possible to optimise quality and efficiency of noise effect studies. So noise visualition was implemented by a commercial Georaphical Information Systems (GIS) in this study. As a result, noise pollution from roadway is visualized in the form of noise contours which provide a visual description of the soundscape. Futhermore, it's seen that noise was not admissible levels according to Turkish Noise Regulation. © 2006. International Scientific Conference SGEM.
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    Use of fenton's reagent for removal of pesticides from industrial wastewater
    (2007) Sahinkaya S.; Ozdemir C.; Karatas M.
    We report in this paper the preliminary results obtained during removal of pesticides from industrial wastewater by Fenton's reagent. Fenton process is attractive alternative to conventional oxidation processes in effluent treatment of recalcitrant compounds. The aim of this study is to evaluate the efficiency of fenton process for the reduction of COD in wastewaters from pesticide industry. Several parameters were also studied: dose of Fe+2 and H2O2. The process of pesticide removal from industrial wastewater using Fenton's reaction has been analysed by taking into consideration COD removal. The optimum ratio of [Fe2+] to [H2O2] was 1: 1,56 (mM/mM) at pH 3.0 and room temperature (20°C). 93 % COD removal was achieved when treated wastewater by Fenton's reagent.