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首页> 外文期刊>Radiation Protection Dosimetry >GAMMA ACTIVITY OF STREAM SEDIMENT FELDSPARS AS CERAMIC RAW MATERIALS AND THEIR ENVIRONMENTAL IMPACT
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GAMMA ACTIVITY OF STREAM SEDIMENT FELDSPARS AS CERAMIC RAW MATERIALS AND THEIR ENVIRONMENTAL IMPACT

机译：沉积物作为陶瓷原料的伽马活性及其对环境的影响

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摘要

In situ gamma spectrometric measurements have been performed to characterise the natural radiation that emitted from the stream sediment feldspars in Wadi El Missikat and Wadi Homret El Gergab, Eastern Desert, Egypt. The measurements of potassium (K, %), equivalent uranium (eU, ppm) and equivalent thorium (eTh, ppm) were converted into specific activities and equivalent dose rate. The average specific activities were 1402 Bq kg~(-t) for K, 113 Bq kg~(-1) for eU and 108 Bq kg~(-1) for eTh in Wadi El Missikat, while they were 1240, 104 and 185 Bq kg"1 in Wadi Homret El Gergab. The calculated outdoor average effective dose rates was 1.1 mSv y~(-1) in wadi El Missikat and 1.3 mSv y(-1) in Wadi Homret El Gergab. The terrestrial-specific activities and effective dose rate levels of the natural radioactivity in the two areas lie within the international recommended limits for occupational feldspar quarry workers. On the other hand, these results indicated that irradiation is higher than the allowable level for members of the public. Therefore, quarrying the feldspar sediments from these locations as ceramic raw materials may yield an undesired impact on the environment, especially through the indoor applications.
机译：在埃及东部沙漠的Wadi El Missikat和Wadi Homret El Gergab的河流沉积物长石中，已经进行了原位伽马能谱测量，以表征自然辐射。将钾（K，％），当量铀（eU，ppm）和当量or（eTh，ppm）的测量值转换为比活度和当量剂量率。 Wadi El Missikat的平均比活为K的1402 Bq kg〜（-t），eU的113 Bq kg〜（-1）和eTh的108 Bq kg〜（-1），分别为1240、104和185 Wadi Homret El Gergab的Bq kg“ 1。室外平均有效剂量率在Wadi El Missikat中为1.1 mSv y〜（-1），在Wadi Homret El Gergab中为1.3 mSv y（-1）。陆地特定活动和这两个地区的自然放射性的有效剂量率水平均在国际上针对长石采石场工作人员的建议限值之内，另一方面，这些结果表明，辐射量高于公众的允许水平。这些位置的长石沉淀物作为陶瓷原料可能会对环境产生不良影响，尤其是在室内应用时。

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  • 来源
    《Radiation Protection Dosimetry》 |2012年第1期|p.175-182|共8页
  • 作者

    Hatem Aboelkhair; Tarek Ibrahim; Ahmed Saad;

  • 作者单位

    Damietta Faculty of Science, Geology Department, Mansoura University, New Damietta, Egypt;

    Nuclear Materials Authority (NMA), Cairo, Egypt;

    Egyptian Environmental Affairs Agency, Mansoura, Egypt;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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