Yazar "Fidan C." seçeneğine göre listele

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    Chromium and thallium in turkish asphaltite sample
    (International Multidisciplinary Scientific Geoconference, 2017) Kavak O.; Aydin F.; Fidan C.; Aydin I.
    Asphaltite derives from petroleum origin solid fossil fuel [1]. It contains valuable elements such as chromium, thallium molybdenum, uranium etc. Chromium and thallium are very important elements both environmental and health. Chromium has an important role in the metabolism. It keeps the blood sugar level in balance. It balances the level of cholesterol. Thallium and its compounds are toxic for humans even at low doses. Poisoning causes death or permanent nervous system disorders. The development of precise and easy determination method for the metals in fuel is essential solving problems due to existence of metals in fuel [2-3]. The aim of this research is to investigate the elemental and proximate analysis of asphaltite samples. In addition, the Chromium, Thallium elements were analyzed by ICP-OES in the asphaltite from Harbul (Sirnak), SE Anatolia-Turkey. Because, Harbul has 25.765.000 tons asfaltite reserves, approximately. It is very important, too. In addition, it can be seen that the proposed ICP-OES procedure is the most simple and reliable analytical method for the elemental analysis of asphaltite due to its high selectivity and low interference problems. © SGEM2017. All Rights Reserved.
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    Nickel speciation in asphaltite bottom ash
    (International Multidisciplinary Scientific Geoconference, 2017) Aydin F.; Kavak O.; Fidan C.; Aydin I.
    Asphaltites derive from petroleum origin. The combustion of asphaltites produces fly and bottom ashes that are characterized by a high content of valuable elements such as vanadium, nickel, molybdenum, uranium, thorium, sulfur and unburnt carbon [1]. This study presents the concentration and speciation of nickel in bottom ash of Milli (Sirnak), SE Anatolia in Turkey. Determination of total nickel in asphaltite bottom ash was performed in two stage microwave-acid digestion followed by inductively coupled plasma optical emission spectrometer (ICP-OES). The revised BCR (Commission of the European Communities Bureau of Reference) scheme applied is a four-step sequential extraction procedure. That was proposed to harmonize and validate the methods used in fractionation studies in soils. A four step sequential extraction process to speciation of nickel from asphaltite bottom ash was investigated [2]. Relative abundances of the remaining fractions follow the order: residual >Organic matter and sulfides> exchangeable with water and acid> Iron and manganese oxides soluble. Nickel speciation scheme allows quantitative knowledge of nickel distribution in asphaltite bottom ash and their toxicity, mobility, leachability, bioaccumulation and bioavailability. © SGEM2017. All Rights Reserved.
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    Study of zinc distribution by sequential extraction procedure
    (International Multidisciplinary Scientific Geoconference, 2017) Kavak O.; Aydin I.; Fidan C.; Erek F.; Aydin F.
    Coal bottom ash (CBA) contains many elements that exist in different forms, which may change throughout the coal combustion process. This study presents the concentration and speciation of zinc in bottom ash of coal. Determination of total zinc was performed by two-stage microwave-acid digestion followed by ICP-OES. A sequential extraction process to speciation of zinc from coal bottom ash was investigated [1]. The definition of species is based on several different levels of atomic and molecular structure where chemical forms of the same element are manifest. It can be considered differences at the levels of (i) isotopic composition, (ii) electronic or oxidation state, (iii) inorganic and organic compounds and their complexes, (iv) organometallic species, and (v) macromolecular compounds and complexes. The conventional method of Rauret et al. with modification was used for the sequential extraction [2]. Zinc is an important element for both the living and the environment. In the vital activities of the cell, it plays a role in the functioning of hormones and enzymes. Inhalation is harmful to health. The toxicity effect of zinc is anionic part of its for environmental. This study presents a modified BCR sequential extraction method for the fractionation of zinc (Zn) in CBA into four forms (exchangeable, reducible, oxidizable, and residual) and determination by inductively coupled plasma optical emission spectrometry (ICP-OES). The sample was taken from Karatepe (Sirnak) Turkey. The advantages of the technique include a high degree of automation, good reproducibility, and short analysis time, which makes it the method of choice for the fractionation of Zn. © SGEM2017. All Rights Reserved.