Yazar "Belivermis, Murat" seçeneğine göre listele

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    Assessment of 210Po and 210Pb in lichen, moss and soil around Can coal-fired power plant, Turkey
    (Springer, 2016) Belivermis, Murat; Kilic, Onder; Cayir, Akin; Coskun, Mahmut; Coskun, Munevver
    This paper deals with determination of Po-210 and Pb-210 activity concentrations using epigeic moss (Hypnum cupressiforme), bushy soil (fruticose) lichen (Cladonia rangiformis) and surface soil samples in the area around C, an coal-fired power plant, northwest Turkey. Mean activity concentrations of Po-210 and Pb-210 were found to be 303.9 and 425.8 Bq kg(-1) for moss, 161.6 and 259.1 Bq kg(-1) for lichen, and 79.9 and 91.5 Bq kg(1) for soil samples at dry weight, respectively. We propose that distance and altitude of sampling site may be of significant parameters of distribution of both radionuclides.
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    Heavy metal and radionuclide levels in soil around Afsin-Elbistan coal-fired thermal power plants, Turkey
    (Springer, 2012) Cayir, Akin; Belivermis, Murat; Kilic, Onder; Coskun, Mahmut; Coskun, Munevver
    This study aimed to determine the incidence of naturally occurring radionuclides Th-232, U-238 and K-40, artificial radionuclide Cs-137, and heavy metals in soil samples collected from the surroundings of Afsin-Elbistan coal-fired thermal power plant in Kahramanmaras Province, Turkey. Physical and chemical properties of the soil samples were also determined. Radiation levels were measured using a gamma multichannel analyzer equipped with an HPGe detector (Canberra 2020). Concentrations of the studied elements were determined using ICP-AES. The average specific activity of Cs-137, K-40, Th-232 and U-238 at standard deviations was found to be 51.4 +/- A 84.9, 409 +/- A 180, 39.8 +/- A 18.8 and 34.4 +/- A 22.0 Bq kg(-1). Radium equivalent activity (Raeq) was calculated to be 122.8 Bq kg(-1), lower than the limits recommended by the OECD. Mean concentrations of heavy metals were 6.29 +/- A 0.77, 70.5 +/- A 20.3, 59.5 +/- A 75.2, 89.8 +/- A 58.9, 26.7 +/- A 23.7, 89.2 +/- A 58.4, 18,806 +/- A 4,273 and 14,634 +/- A 1,166 mg.kg(-1) for Cd, Cr, Cu, Ni, Pb, Zn, Al and Fe, respectively. The Cd content in all samples and maximum values of Cu, Cr and Ni were higher than the limits specified for soil in Turkey.
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    Impacts of elevated pCO2 on Mediterranean mussel (Mytilus galloprovincialis): Metal bioaccumulation, physiological and cellular parameters
    (Elsevier Sci Ltd, 2020) Sezer, Narin; Kilic, Onder; Sikdokur, Ercan; Cayir, Akin; Belivermis, Murat
    Ocean acidification alters physiology, acid-base balance and metabolic activity in marine animals. Near future elevated pCO(2) conditions could be expected to influence the bioaccumulation of metals, feeding rate and immune parameters in marine mussels. To better understand such impairments, a series of laboratory-controlled experiment was conducted by using a model marine mussel, Mytilus galloprovincialis. The mussels were exposed to three pH conditions according to the projected CO2 emissions in the near future (one ambient: 8.10 and two reduced: 7.80 and 7.50). At first, the bioconcentration of Ag and Cd was studied in both juvenile (2.5 cm) and adult (5.1 cm) mussels by using a highly sensitive radiotracer method (Ag-110m and Cd-109). The uptake and depuration kinetics were followed 21 and 30 days, respectively. The biokinetic experiments demonstrated that the effect of ocean acidification on bioconcentration was metal-specific and size-specific. The uptake, depuration and tissue distribution of Ag-110m were not affected by elevated pCO(2) in both juvenile and adult mussels, whereas Cd-109 uptake significantly increased with decreasing pH in juveniles but not in adults. Regardless of pH, Ag-110m accumulated more efficiently in juvenile mussels than adult mussels. After executing the biokinetic experiment, the perturbation was sustained by using the same mussels and the same experimental set-up, which enabled us to determine filtration rate, haemocyte viability, lysosomal membrane stability, circulating cell-free nucleic acids (ccf-NAs) and protein (ccf-protein) levels. The filtration rate and haemocyte viability gradually decreased by increasing pCO(2) level, whereas the lysosomal membrane stability, ccf-NAs, and ccf-protein levels remained unchanged in the mussels exposed to elevated pCO(2) for eighty-two days. This study suggests that acidified seawater partially shift metal bioaccumulation, physiological and cellular parameters in the mussel Mytilus galloprovincialis.
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    Radioactivity concentrations and dose assessment in surface soil samples from east and south of Marmara region, Turkey
    (Oxford Univ Press, 2008) Kilic, Onder; Belivermis, Murat; Topcuoglu, Sayhan; Cotuk, Yavuz; Coskun, Mahmut; Cayir, Akin; Kucer, Rahmi
    The activity concentrations of (137)Cs, (40)K, (232)Th, (238)U and (226)Ra were measured in surface soil samples from East and South of Marmara region, Turkey. The physico-chemical parameters (organic matter, CaCO(3) contents and pH-value) of the soil samples were determined in the samples collected from 100 sampling stations. The average activity concentrations of (137)Cs, (40)K, (232)Th, (238)U and (226)Ra were found to be 27.46 +/- 21.84, 442.51 +/- 189.85, 26.63 +/- 15.90, 21.77 +/- 12.08 and 22.45 +/- 13.31 Bq kg(-1), respectively. The mean value of total annual external gamma radiation dose equivalent for the natural radionuclides was calculated to be 54.86 mu Sv. The current data were compared with those found in the other locations of Turkey and different countries.
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    Radioactivity concentrations in topsoil samples from the Thrace region of Turkey and assessment of radiological hazard
    (Taylor & Francis Ltd, 2008) Belivermis, Murat; Kilic, Onder; Cotuk, Yavuz; Topcuoglu, Sayhan; Coskun, Mahmut; Cayir, Akin; Kucer, Rahmi
    The activity concentrations of gamma emitting radionuclides were measured in surface soil samples from the Thrace region. 232Th, 238U, 226Ra, 40K and 137Cs activities and physico-chemical parameters of the soil samples were determined in samples collected from 73 sampling stations. Radionuclide concentrations measured were compared with those found in the samples from other locations of Turkey and from different countries. The average activity concentrations of 232Th, 238U, 226Ra, 40K and 137Cs were found to be 24.718.79, 22.307.93, 32.0912.44, 509.00160.05, 32.7429.24Bqkg-1, respectively. The mean value of the annual effective dose equivalent from the outdoor terrestrial gamma radiation was calculated as 57.2 Sv.