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NATURAL RADIOACTIVITY CONTENTS IN TOBACCO AND RADIATION DOSE INDUCED FROM SMOKING

机译:吸烟引起的烟草中自然放射性含量和辐射剂量

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摘要

One of the causative factors for cancer-inducing mechanisms in humans is radioactive elements present in tobacco leaves used in the manufacture of cigarettes. Smoking of tobacco and its products increases the internal intake and radiation dose due to naturally occurring radionuclides that are considered to be one of the most significant causes of lung cancer. In this work, different commercial types of cigarettes, cigar and moassel were collected from market. Naturally occurring radionuclides ~(226)Ra and ~(214)Bi (~(238)U series), ~(228)Ac and ~(228)Ra (~(232)Th series), ~(40)K and man-made ~(137)Cs were measured in tobacco using gamma-ray spectrometer. Results show that the average concentrations of ~(238)U, ~(232)Th and ~(40)K were 4.564, 3.940 and 1289.53 Bq kg~(-1), respectively. This reflects their origin from the soil by root uptake and fertilisers used in the cultivation of tobacco plants. Concentration of ~(137)Cs was 0.348 Bq kg~(-1) due to root uptake or deposition onto the leaf foliage. For smokers, the annual effective dose due to inhalation of ~(238)U varied from 49.35 to 139.40 μSv~(-1) (average 104.27 μSv y~(-1)), while of ~(232)Th from 23.86 to 111.06 μSv y~(-1) (average 65.52 μSv y~(-1)). The annual effective dose resulting from ~(137)Cs was varied from 10.96 to 24.01 nSv y~(-1) (average 19.41 nSv y~(-1)).
机译:导致人类癌症的机制之一是卷烟生产中使用的烟叶中存在的放射性元素。吸烟及其烟草制品增加了内部摄入量和辐射剂量,这是由于天然存在的放射性核素被认为是引起肺癌的最重要原因之一。在这项工作中,从市场上收集了不同的商业类型的香烟,雪茄和mo子。天然存在的放射性核素〜(226)Ra和〜(214)Bi(〜(238)U系列),〜(228)Ac和〜(228)Ra(〜(232)Th系列),〜(40)K和γ射线光谱仪在烟草中测定了〜(137)Cs。结果表明,〜(238)U,〜(232)Th和〜(40)K的平均浓度分别为4.564、3.940和1289.53 Bq kg〜(-1)。这反映了它们的根源来自土壤,其根系吸收和种植烟草植物所使用的肥料。由于根吸收或沉积在叶片上,〜(137)Cs的浓度为0.348 Bq kg〜(-1)。对于吸烟者,因吸入〜(238)U而产生的年有效剂量在49.35至139.40μSv〜(-1)之间(平均104.27μSvy〜(-1)),而〜(232)Th从23.86至111.06 μSvy〜(-1)(平均65.52μSvy〜(-1))。 〜(137)Cs产生的年有效剂量在10.96至24.01 nSv y〜(-1)之间变化(平均为19.41 nSv y〜(-1))。

著录项

  • 来源
    《Radiation Protection Dosimetry》 |2012年第1期|p.91-95|共5页
  • 作者

    Hany A. Shousha; Fawzia Ahmad;

  • 作者单位

    Ionizing Radiation Metrology Laboratory, National Institute for Standards (NIS), Giza, Egypt;

    Ionizing Radiation Metrology Laboratory, National Institute for Standards (NIS), Giza, 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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