Yazar "Baysal, A" seçeneğine göre listele

Listeleniyor 1 - 7 / 7
  • [ X ]
    Öğe
    Chemical analysis of geothermal water of Cermik, Turkey
    (Parlar Scientific Publications (P S P), 2003) Akba, O; Baysal, A; Hamamci, C; Merdivan, M; Gumgum, B
    Geothermal water of Cermik, which is located in Southeast Anatolia - Turkey, is a Na-Cl-HCO3 type containing also sulfide and iodide. The temperature, pH and flow rate of the geothermal water are 51 degreesC, 7.6 and 21 L s(-1), respectively. Its physical and chemical characterization in detail was done using standard methods. The trace elements Al, Ba, Co, Cr, Cu, Fe, Mn, Ni, Pb, Sr and Zn were analyzed directly using inductively coupled plasma-atomic emission spectrometry due to very low detection limits and the good reproducibility of this analytical method.
  • [ X ]
    Öğe
    Comparison of microwave digestion procedures for the determination of some elements in asphaltite ash using ICP-AES
    (Soc Chimica Italiana, 2002) Baysal, A; Akba, O; Merdivan, M; Hamamci, C; Gümgüm, B
    A microwave digestion procedure for asphaltite ash was developed in an attempt to facilitate routine analysis and obtain reproducible conditions or comparable results. The. conditions of the most effective procedure for 0.1g asphaltite ash samples are 1 ml of HNO3 + 3 ml of HCl + 1 ml of HF + 1 ml of deionized water as acid mixture and 15 min for digestion time. The digestion was accomplished in five stages applying continuously 90 % to 20 % of the microwave power and 20 to 100 psi of the pressure for 10 min of total time. Concentrations of selected elements, Cr, Co, Fe, Mn, Ni and Zn were measured using inductively coupled plasma-atomic emission spectroscopy. The proposed method of digestion provided precise results with relative standard deviations generally less than 3 % for investigated elements. Results for fly ash as standard reference material was in good agreement with certified values.
  • [ X ]
    Öğe
    Matrix effects of concomitant species on the determination of nickel by inductively coupled plasma atomic emission spectrometry
    (Mrs Pushpa Agarwal, 2005) Akba, O; Baysal, A; Merdivan, M; Hamamci, C; Gumgum, B
    The interference on the determination of nickel by the salts LiCl, NaCl, KCl, CsCl, NH4Cl, Na2SO4, NaNO3, NaC2H3O2 in an inductively coupled plasma-atomic emission spectrometry has been carried out. The salt concentration was in the 100-10000 mg L-1 range. Nickel emission was enhanced at lower matrix concentrations (100 mg L-1) and was depressed at higher matrix concentrations (10000 mg L-1). Except cesium, above 100 mg L-1, all studied ions caused a decrease in the signal intensity in the range of 0-15%. The sequence order of the investigated ions for the enhancement and depression was unstable. The sequence order in enhancement was found as Li+ < Na+ < K+ < Cs+ < NH4+ for cation; NO3- < SO42- < Cl- < OAc- for anions and Cs+ < NH4+ < K+ < Li+ < Na+ for cat-ions and OAc- < SO42- Cl- < NO3- for anions in depression at the studied lines.
  • [ X ]
    Öğe
    Microwave irradiation technique for synthesis of dialkyl dithiophosphoric acids
    (Taylor & Francis Ltd, 2002) Gümgüm, B; Biricik, N; Baysal, A
    Microwave heating technique was applied to the preparation of dialkyl dithiophosphoric acids from the reaction of alcohol with phosphorus pentasulphide. A microwave oven (CEM-MDS 2000) was utilized to determine the preparation conditions for the best yield of dialkyl dithiophosphoric acids under atmospheric pressure at various times and power Six different (C-4-C-9) chain-length of dialkyl dithiophosphoric acids were studied. All experiments were performed in an open Teflon (poly-tetrafluoroethylene) vessel. The results obtained showed that the reaction of dialkyl dithiophosphoric acids can be achieved more rapidly using microwave heating than using conventional procedures.
  • [ X ]
    Öğe
    Microwave irradiation technique for the synthesis of dialkyl dithiophosphoric acids
    (Gordon Breach Publishing, Taylor & Francis Group, 2000) Gümgüm, B; Biricik, N; Baysal, A
    Microwave heating technique was applied to the preparation of dialkyl dithiophosphoric acids from the reaction of alcohol with phosphorus pentasulphide. A microwave oven (CEM-MDS 2000) was utilised to determine the preparation conditions For the best yield of dialkyl dithiophosphoric acids under atmospheric pressure at various times and power. Six different (C-4-C-9) chain-length of dialkyl dithiophosphoric acids were studied. All experiments were performed in an open Teflon (poly-tetrafluoroethylene) vessel. The results obtained showed that the reaction of dialkyl dithiophosphoric acids can be achieved more rapidly using microwave heating than using conventional procedures.
  • [ X ]
    Öğe
    Polymer supported humic acid for separation and preconcentration of thorium(IV)
    (Taylor & Francis Inc, 2004) Erdogan, S; Merdivan, M; Hamamci, C; Akba, O; Baysal, A
    The resin impregnating humic acid (HA) onto XAD-4 has been prepared to investigate adsorption behaviour of Th(IV). The characterization of the resulting resin has been carried out by infrared spectral data and sorption capacity. Maximum adsorption capacity of Th(IV) on the resin is found to be 1.51 X 10(-4) mol g(-1) at pH 4. The sorbent was found to possess a high selectivity for Th(IV) with an optimum extraction pH around 3-7. Recoveries for Th(IV) determined prior to breakthrough were found to be quantitative (96-99%). The resin exhibits good chemical stability, reuseability, and a faster rate of equilibration for Th(IV) determination. The influence of several ions as interferents is discussed. The method has been successfully applied for the separation of Th(IV) in synthetic mixtures.
  • [ X ]
    Öğe
    Pyrolysis kinetics and chemical composition of Hazro coal according to the particle size
    (Springer, 2005) Duz, MZ; Tonbul, Y; Baysal, A; Akba, O; Saydut, A; Hamamci, C
    The relationship between particle size and chemical composition of Hazro coal (origin: SE Anatolia, Turkey) has been examined by elemental analysis and by thermogravimetric pyrolysis. The chemical composition of the coal was determined by grinding sample particles physically and separating according to their size in mm by sieving. Particle size distribution of the coal and chemical composition of these fractions were given. The coal has been non-isothermally pyrolysed in a thermogravimetric analyser to determine the kinetic factors. Thermal gravimetric (TG/DTG) experiments were performed from ambient temperature to 800 degrees C under a nitrogen atmosphere at heating rate 10 K min(-1) with five different particle size ranges. Kinetic parameters of the samples were determined using a Coats and Redfern kinetic model, assuming a first-order reaction. Depending on the particle size of the coal samples, the mean activation energy values varied between 49.1 and 84.6 kJ mol(-1). The results discussed indicate that activation energies increase as the particle size decreases.