Yazar "Aydin I." 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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    Content and mobility behavior of iron and manganese in asphaltite burning residue using ICP-OES
    (Perkin - Elmer Corp., 2014) Aydin I.; Gunduz B.; Aydin F.; Akba O.; Saydut A.; Hamamci C.
    The determination of inorganic pollutants leaching from solid waste, such as coal, asphaltite, oil shale, and ash, is an important topic for industrial applications and solid waste management. This study presents the concentration and fractionation of iron (Fe) and manganese (Mn) in asphaltite burning residue (ABR) and their determination by inductively coupled plasma optical emission spectrometry (ICP-OES). A modified Tessier sequential extraction method was used for the fractionation of Fe and Mn in four forms (exchangeable, carbonates, bound to organic and sulfide, and residual content). Investigations on the Fe and Mn chemical fractions and their environmental mobility in ash solution systems were carried out. It was found that Mn in ABR (from Harbul-Silopi, Turkey) occurs in the following fractions: exchangeable (13.56%), associated with carbonates (28.94%), associated with organic matter and sulfides (17.48%), and residual content (40.08%). Fe occurs in the following fractions: exchangeable (11.11%), carbonates (27.68%), organic matter and sulfides (23.39%), and residual content (37.82%). Among these fractions, the exchangeable and carbonate-bound fractions are unstable and prone to leach out, while the organic matter-bound fractions and the residual fractions are considered to be relatively stable and of low bioavailability. Thw mobility fractions of Fe contain 38.79% and of Mn contain 42.50% of their total concentration in ABR under normal environmental conditions.
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    Determination of stability constants and thermodynamic parameters of some metal complexes with 2-hydroxynaphthalin-1-carbaldehydene 1-naphtylamin
    (2005) Ziyadanoğullari B.; Aydin F.; Şahin E.; Aydin I.; Temel H.
    The thermodynamic parameters of complexes of Cu(II), Ni(II) and Zn(II) cations with hydroxynaphthalin-1-carbaldehydene-1-naphtylamin were determined in 60% (v/v) DMF-water, various ionic strengths (0.07,0.13, 0.2 M NaNO 3) and at different temperatures (25, 30, 35,40 ± 0.1°C) using a spectrophotometric method. The sodium nitrate solution was used to maintain the ionic strengths. The stability constants show an inverse relationship with ionic strengths. The thermodynamic parameters (60% (v/v) DMF-water 60% (v/v) DMF- water (?G0, ?H0, ?S0) based on these formation constants were determined. The acid dissociation constant of ligand was investigated in 60 % (v/v) DMF-water has also been calculated at different temperatures.
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    Effects of sewage sludge used as fertilizer on the yield and chemical contents of Lucerne (Medicago Sativa L.) and soil
    (Parlar Scientific Publications, 2015) Kusvuran A.; Saruhan V.; Aydin I.; Kokten K.
    This study was conducted to determine the effects of sewage sludge (SS) used as fertilizer at different concentrations (control, 20 kg ha-1 nitrogen (N), 30,60 and 90 ton ha-1 SS, 20 kg ha-1 N + 30 ton ha-1 SS, 20 kg ha-1 N + 60 ton ha-1 SS and 20 kg ha-1 N + 90 ton ha-1 SS) on lucerne yields and chemical features. For this purpose, an increasing level of SS was applied to the soil samples. The residuals of some heavy metal (Hg, Cr, Fe, Ni, Zn, Mn, Pb, Cu, Co, and Se) and macro element (K, Ca, Na, Mg, C, and S) concentrations were measured in the plants and soils. According to the results of this study, SS, when applied to soil in increasing amounts, raised the mineral matter contents of the plants, which favorably affected plant growth. Consequently, it affected the herbage yield, increasing the yield in parallel with the increasing SS concentrations. Applying N with the SS positively influenced the heavy metal contents of the lucerne and residue in the soil. Additionally, the heavy metal contents were found at below critical levels in both the soil and plants. Therefore, SS application as fertilizer used in appropriate concentrations did not pollute the soil very much, but did lead to an increase in plant products.
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    Histopathologic effect of gonadal steroids and gender on goiter development in thyroid stimulated rabbits by TRH
    (1995) Aydin I.; Nergiz Y.; Ketani A.; Aslan I.
    In order to assess the effect of gender and gonadal steroids on goiter development, thirty-two New Zealand albino rabbits were studied. The experimental protocol was based on histopathological changes observed in the thyroid gland following manipulation of gonadal hormone levels and stimulation by TRH. Gender differences for the structure end size of follicles following TRH administration remained significantly larger in females than in males (p < 0.001). In gonadectomied male and female groups, there appeared to be a quantitative difference in response to TRH. Follicular cell proliferation and papillary structures were prominent and the diameter of the follicles was significantly larger in males compared with females (P < 0.001). In gonadectomied rabbits treated with the opposite gonadal steroids, the appearance of papillary structures and basophilic character of the colloid on staining were also prominent in males. The results indicate that (i) estrogen promotes while androgen inhibits to some extent the stimulatory effects of TRH on thyroid follicular size; and (ii) although the data would support the effect of gender and sex steroids on goiter development, factors other than gonadal steroids are responsible for the higher incidence of goiter in females.
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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.