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南沙海域沉积物岩心中238U和40K的测定及深度变化

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陈俊畅, 夏良树, 麻卓然, 曹修齐, 黄炎傲, 王凤蝶, 彭安国, 刘广山. 南沙海域沉积物岩心中238U和40K的测定及深度变化[J]. 环境化学, 2018, 37(5): 968-973. doi: 10.7524/j.issn.0254-6108.2017070403
引用本文: 陈俊畅, 夏良树, 麻卓然, 曹修齐, 黄炎傲, 王凤蝶, 彭安国, 刘广山. 南沙海域沉积物岩心中238U和40K的测定及深度变化[J]. 环境化学, 2018, 37(5): 968-973. doi: 10.7524/j.issn.0254-6108.2017070403
shu
CHEN Junchang, XIA Liangshu, MA Zhuoran, CAO Xiuqi, HUANG Yan, WANG Fengdie, PENG Anguo, LIU Guangshan. Determination of 238U and 40K in sediment cores in Nansha sea area and their depth profiles[J]. Environmental Chemistry, 2018, 37(5): 968-973. doi: 10.7524/j.issn.0254-6108.2017070403
Citation: CHEN Junchang, XIA Liangshu, MA Zhuoran, CAO Xiuqi, HUANG Yan, WANG Fengdie, PENG Anguo, LIU Guangshan. Determination of 238U and 40K in sediment cores in Nansha sea area and their depth profiles[J]. Environmental Chemistry, 2018, 37(5): 968-973. doi: 10.7524/j.issn.0254-6108.2017070403
shu

南沙海域沉积物岩心中238U和40K的测定及深度变化

  • 1.

    南华大学核科学技术学院, 衡阳, 421001;

  • 2.

    厦门大学海洋与生态学院, 厦门, 361005

  • 基金项目:

    国家级大学生创新创业训练计划支持项目（201610555005）资助.

Determination of 238U and 40K in sediment cores in Nansha sea area and their depth profiles

  • 1.

    School of Nuclear science and technology, University of South China, Hengyang, 421001, China;

  • 2.

    College of ocean and ecology, Xiamen University, Xiamen, 361005, China

  • Fund Project: Supported by National Undergraduate Innovation and Entrepreneurship Training Program Support Projects(201610555005).

  • 摘要: 用HPGe γ 谱方法测定了6个来自南沙海域沉积物岩心的238U和40K，获得结果如下：238U的放射性活度变化范围为（13.87±1.73）—（46.63±3.08） Bq·kg-1，平均值的变化范围为（19.30±1.72）—（43.19±3.06） Bq·kg-1；40K的放射性活度变化范围为（147.37±8.13）—（569.35±11.11） Bq·kg-1，平均值的变化范围为（159.32±6.51）—（471.30±9.16） Bq·kg-1.与其他海域比较发现，本研究海域的238U活度范围及平均值与其他海域比较接近，而40K的活度范围与平均值则比其他海域要稍低点.这两个核素的深度变化趋势均随深度的增加有微弱的增大、减小或不明显变化的3种类型，相比较而言，40K随深度的变化幅度不如238U明显，造成这种现象的原因主要可能是沉积物组成、水动力学等.
    Abstract: 238U and 40k in six sediment cores in Nansha sea were measured by HPGe gamma spectrometry. The results showed that the activity of 238U in these cores ranged from 13.87±1.73 Bq·kg-1 to 46.63±3.08 Bq·kg-1 and the range of the average value was 19.30±1.72 Bq·kg-1 to 43.19±3.06 Bq·kg-1. As for 40k, the activity ranged from 147.37±8.13 Bq·kg-1 to 569.35±11.11 Bq·kg-1 and the range of the average value was 159.32±6.51 Bq·kg-1 to 460.08±10.34 Bq·kg-1. Comparing with the results in other sea areas,The content and average value of 238U in this area were close to the values in other sea areas, but the content and average value of 40K were slightly lower than those in other sea areas. The depth profiles of the two nuclides can be divided into 3 types. The first was a slight increase with the increase of depth, the second was a slight decrease with the increase of depth, and the third was no obvious change with the increase of depth. In comparison, the variation of 40K with depth was not as obvious as that of 238U.The reasons might be the composition of sediment and hydrodynamics et al.
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  • 收稿日期:  2017-07-04
  • 刊出日期:  2018-05-15
陈俊畅, 夏良树, 麻卓然, 曹修齐, 黄炎傲, 王凤蝶, 彭安国, 刘广山. 南沙海域沉积物岩心中238U和40K的测定及深度变化[J]. 环境化学, 2018, 37(5): 968-973. doi: 10.7524/j.issn.0254-6108.2017070403
引用本文: 陈俊畅, 夏良树, 麻卓然, 曹修齐, 黄炎傲, 王凤蝶, 彭安国, 刘广山. 南沙海域沉积物岩心中238U和40K的测定及深度变化[J]. 环境化学, 2018, 37(5): 968-973. doi: 10.7524/j.issn.0254-6108.2017070403
shu
CHEN Junchang, XIA Liangshu, MA Zhuoran, CAO Xiuqi, HUANG Yan, WANG Fengdie, PENG Anguo, LIU Guangshan. Determination of 238U and 40K in sediment cores in Nansha sea area and their depth profiles[J]. Environmental Chemistry, 2018, 37(5): 968-973. doi: 10.7524/j.issn.0254-6108.2017070403
Citation: CHEN Junchang, XIA Liangshu, MA Zhuoran, CAO Xiuqi, HUANG Yan, WANG Fengdie, PENG Anguo, LIU Guangshan. Determination of 238U and 40K in sediment cores in Nansha sea area and their depth profiles[J]. Environmental Chemistry, 2018, 37(5): 968-973. doi: 10.7524/j.issn.0254-6108.2017070403
shu

南沙海域沉积物岩心中238U和40K的测定及深度变化

  • 1.  南华大学核科学技术学院, 衡阳, 421001;
  • 2.  厦门大学海洋与生态学院, 厦门, 361005
  • 收稿日期:  2017-07-04
基金项目:

国家级大学生创新创业训练计划支持项目（201610555005）资助.

摘要: 用HPGe γ 谱方法测定了6个来自南沙海域沉积物岩心的238U和40K，获得结果如下：238U的放射性活度变化范围为（13.87±1.73）—（46.63±3.08） Bq·kg-1，平均值的变化范围为（19.30±1.72）—（43.19±3.06） Bq·kg-1；40K的放射性活度变化范围为（147.37±8.13）—（569.35±11.11） Bq·kg-1，平均值的变化范围为（159.32±6.51）—（471.30±9.16） Bq·kg-1.与其他海域比较发现，本研究海域的238U活度范围及平均值与其他海域比较接近，而40K的活度范围与平均值则比其他海域要稍低点.这两个核素的深度变化趋势均随深度的增加有微弱的增大、减小或不明显变化的3种类型，相比较而言，40K随深度的变化幅度不如238U明显，造成这种现象的原因主要可能是沉积物组成、水动力学等.

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