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Öğe DETERMINATION OF VANADIUM IN TURKISH ASPHALTITES(Estonian Academy Publishers, 2010) Aydin, I.; Aydin, F.; Kilinc, E.; Hamamci, C.Vanadium is found in many rocks and minerals, including asphaltite. Asphaltite is one of the naturally occurring black, solid bitumens, which are soluble at heating in carbon disulfide and fuse. Asphaltite is also a solidified hydrocarbon compound derived from petroleum. Determination of vanadium in asphaltite ash was performed by microwave-acid digestion followed by inductively coupled plasma-optical emission spectrometry (ICP-OES) and flame atomic absorption spectrometry (FAAS). Asphaltites from Avgamasya, Harbul, and Seguruk deposits in SE Anatolia of Turkey have been investigated. Concentrations of vanadium in Avgamasya, Harbul, Seguruk asphaltite bottom ashes were determined using ICP-OES to be 5.871, 4.324, 2.777 g kg(-1), respectively.Öğe From mg/kg to pg/kg Levels: A Story of Trace Element Determination: A Review(Taylor & Francis Inc, 2011) Bakirdere, S.; Aydin, F.; Bakirdere, E. G.; Titretir, S.; Akdeniz, I.; Aydin, I.; Yildirim, E.Determination of the trace elements in a variety of environmental samples is of great importance. Most elements, including iron, calcium, and selenium, are crucial for the regulation of human mechanisms, and many others, like lead and cadmium, are toxic even at trace levels. Some elements, like selenium, have a narrow margin of safety. Hence, determination of elements at trace levels is crucial in any matrix related to humans. Trace element determination requires sufficiently sensitive procedures to monitor trace levels. This review aims to highlight not only the development in instrumentation for ultratrace element determination in variety of matrices but the application of developed techniques. Advantages and disadvantages of the techniques are also discussed.Öğe Molybdenum Speciation in Coal Bottom Ash Using a Sequential Extraction Procedure and Determination by FAAS(Taylor & Francis Inc, 2013) Aydin, F.; Saydut, A.; Gunduz, B.; Aydin, I.; Erdogan, S.; Hamamci, C.Coal bottom ash contains many elements that exist in different forms, which may change throughout the coal combustion process. This study presents the concentration and speciation of molybdenum in bottom ash of coal. Determination of total molybdenum was performed by two-stage microwave-acid digestion followed by flame atomic absorption spectrometry. A sequential extraction process to speciation of molybdenum from coal bottom ash was investigated. The most abundant form of molybdenum in samples is sulfide fraction of molybdenum. Relative abundances of the remaining fractions follow the order: Residual > Reduciple > Oxidizable > Exchangeable > Carbonate > Water soluble.Öğe Selective Extraction of Copper(II) from Aqueous Solution by Using Schiff Bases(Polish Chemical Soc, 2009) Aydin, I.; Sozcan, S.; Ziyadanogullari, B.; Temel, H.New [N,N'-bis-(salicylaldehydene)-1,2-bis-(m-aminophenoxy)ethane] (MAS) and a common tetra dentate ligand N,N'-ethylenebis(salicylideneimine) (AS) for this study have been prepared, and the new ligand was characterized on the basis of microanalytical data, elemental analysis, UV-visible, IR, H-1 NMR and C-13 NMR spectra. Selective extraction of Cu(II) from aqueous solution by using N,N'-bis-(salicylaldehydene)-1,2-bis-(m-aminophenoxy)ethane and N,N'-ethylenebis(salicylideneimine) was studied. Separation of Cu(II) from other metal ions such as Cd(II), Pb(II), Ni(II), Co(II) in aqueous solutions of various pH values and complexing reagents (MAS, AS) was described. The separation factors for these metals using these reagents were reported and efficient methods for the separation of Cu(II) from other metal ions were proposed. From the loaded organic phase, Cu(II) stripping was carried out in one stage with different mineral acid solutions. The stripping efficiency was found to be quantitative in case of H2SO4 for MAS and HNO3, H2SO4, HCl for AS.10
