TY - JOUR
T1 - Natural radioactivity and radiological risk parameters in local and imported building materials used in sudan
AU - Adreani, T. E.
AU - Mattar, E.
AU - Alsafi, K.
AU - Sulieman, A.
AU - Suliman, I. I.
N1 - Publisher Copyright:
© 2020, ALÖKI Kft., Budapest, Hungary.
PY - 2020
Y1 - 2020
N2 - Natural radioactivity levels in selected types of building materials used in Sudan were measured using gamma spectrometry. Radioactivity concentrations were measured in 52 samples including cements, porcelain ware, and ceramic tiles, cement blocks, and red clay bricks. Representative samples were powdered and stored in polyethylene Marinelli containers for four weeks to attain equilibrium between226Ra and232Th and their daughters before measurements. The average radioactivity (Bq.kg-1) of226Ra,232Th, and40K, ranged between 12–40, 10–70, and 28–94, respectively in cement; 10–35, 12–28, and 87-143, respectively in cement blocks; 32–132, 26–87, and 285–1070, respectively in red bricks; and 8-527, 18–118, and 129–812, respectively in ceramics and porcelain tiles. The air absorbed dose rates ranged between 12.0±3.0 to 40.5±23.0 nGyh-1 in materials used in a superficial amount; 34.4±8.9 to 173.3±52.0 nGyh-1 in materials used in bulk. The annual effective doses were varied from 0.06 to 0.85 mSv. Excluding porcelain ware samples. The activity concentration indexes describing external and internal radiation hazards were within the acceptable limits. The study provides important baseline data for setting national regulatory control limits for protection against radiation.
AB - Natural radioactivity levels in selected types of building materials used in Sudan were measured using gamma spectrometry. Radioactivity concentrations were measured in 52 samples including cements, porcelain ware, and ceramic tiles, cement blocks, and red clay bricks. Representative samples were powdered and stored in polyethylene Marinelli containers for four weeks to attain equilibrium between226Ra and232Th and their daughters before measurements. The average radioactivity (Bq.kg-1) of226Ra,232Th, and40K, ranged between 12–40, 10–70, and 28–94, respectively in cement; 10–35, 12–28, and 87-143, respectively in cement blocks; 32–132, 26–87, and 285–1070, respectively in red bricks; and 8-527, 18–118, and 129–812, respectively in ceramics and porcelain tiles. The air absorbed dose rates ranged between 12.0±3.0 to 40.5±23.0 nGyh-1 in materials used in a superficial amount; 34.4±8.9 to 173.3±52.0 nGyh-1 in materials used in bulk. The annual effective doses were varied from 0.06 to 0.85 mSv. Excluding porcelain ware samples. The activity concentration indexes describing external and internal radiation hazards were within the acceptable limits. The study provides important baseline data for setting national regulatory control limits for protection against radiation.
KW - Cements and bricks
KW - Gamma index
KW - Gamma spectrometry
KW - Indoor radiation hazards
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U2 - 10.15666/aeer/1806_75637572
DO - 10.15666/aeer/1806_75637572
M3 - Article
AN - SCOPUS:85098718529
SN - 1589-1623
VL - 18
SP - 7563
EP - 7572
JO - Applied Ecology and Environmental Research
JF - Applied Ecology and Environmental Research
IS - 6
ER -