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大气颗粒物滞留时间的确定方法及初步实验验证

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成果类型:
期刊论文
作者:
Shan Jian;Xiao De-Tao;Liu Wei*;Lin Jun;Wang Guang-Hua;...
通讯作者:
Liu Wei
作者机构:
[Xiao De-Tao; Shan Jian; Zhou Qing-Zhi; Wei Nan-Nan] Univ S China, Shool Nucl Sci & Technol, Hengyang 421001, Peoples R China.
[Lin Jun; Liu Wei; Wang Guang-Hua] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
通讯机构:
[Liu Wei] C
Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
语种:
中文
关键词:
大气颗粒物;滞留时间;氡子体
关键词(英文):
atmospheric aerosol;residence time;daughter products of radon
期刊:
物理学报
ISSN:
1000-3290
年:
2010
卷:
59
期:
8
页码:
5358-5363
基金类别:
National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [10775174]; Chinese Academy of SciencesChinese Academy of Sciences [KJCX-3SYW-N3]; Shanghai Institute of Applied PhysicsChinese Academy of Sciences [90070301]; Education Department of Hunan Provincial [07A060]; Innovation Foundation for Graduate of Hunan Province of China [2008CXJJ02]
机构署名:
本校为第一机构
院系归属:
核科学技术学院
摘要:
通过研究大气颗粒物中~(222)Rn子体活度比与颗粒物平均寿命之间的关系,建立了基于活度比估算大气颗粒物滞留时间(residence time of atmospheric aerosol,RTAA)的方法,并在相对理想条件下进行了实验验证.当氡室浓度稳定为1.816 kBq/m~3时,由214Bi/214Pb活度比计算出的RTAA为112.17 min,与氡室的平均换气时间(104.17 min)相当,表明大气颗粒物中同一衰变链上的放射性核素活度比(如~(214)Bi/~(214)Pb, ~(210)Bi/~(210)Pb或~(210)Po/~(210)Pb)可以用于估算RTAA.
摘要(英文):
A method of estimating residence time of atmospheric aerosol (RTAA) is established based on the relationship between specific activity ratio of radon daughters in atmospheric particles and average life of the particles. The method is further testified in a standard radon chamber. When specific activity of radon is 1.816 kBq/m3 in the chamber, the RTAA is estimated to be 112.17 min, which is in agreement with the mean-ventilation time in the chamber, 104.17 min. Therefore, the residence time of the atmospheric aerosol can be estimated by using t...

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