Radioactivity concentrations and risk assessment of Tekirdag lignites (case study of Malkara coalfield)

GÜLLÜDAĞ C. B., AKSOY E., Unal N., ÖZMEN S. F.

ACTA GEOPHYSICA, cilt.68, sa.5, ss.1411-1420, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 68 Sayı: 5
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1007/s11600-020-00468-3
  • Dergi Adı: ACTA GEOPHYSICA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1411-1420
  • Anahtar Kelimeler: Lignite, Coal, Natural radioactivity, HPGe, Radiological hazards, Malkara, Tekirdag, Thrace region, FIRED POWER-PLANTS, NATURAL RADIONUCLIDES, THRACE BASIN, BY-PRODUCTS, COAL, ASHES, SAMPLES, MINE
  • Akdeniz Üniversitesi Adresli: Evet

Özet

Malkara coals are located in the Oligocene-aged Danismen Formation in the Thrace Tertiary coal basin. The Danismen Formation consists of limestone, sandstone, tuffite, siltstone, claystone and intercalated coal. Elemental and specific natural radionuclide concentrations of lignites collected from Tekirdag-Malkara coalfield were determined, and the associated radiological risk was assessed. In order to examine the depth-dependent radionuclide concentration changes, samples were taken from top, middle and bottom parts of the boreholes. Gamma spectrometric measurements of radionuclide activities were performed with HPGe detector. The calculated mean(226)Ra,Th-232 and(40)K concentrations were 27.0 +/- 3.57, 18.9 +/- 3.28 and 155 +/- 36.1 Bq kg(-1), and the measured U, Th, Pb and K concentrations were 4.04, 6.27, 10.6 ppm and 0.82%, respectively. Findings were comparable with the reported literature for Turkey and other countries from the world. The dose due to the radionuclide content of lignites was not very high to pose a serious health risk.