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广东省环境辐射监测中心 广州 510305
[ "覃连敬,男,1983年出生,2008年于中山大学获硕士学位,现从事放化分析和辐射环境监测", "QIN Lianjing, male, born in 1983, graduated from Sun Yat-Sen University with a master’s degree in 2008, engaged in radiochemical analysis and radiation environmental monitoring" ]
收稿日期:2016-05-13,
修回日期:2016-07-11,
纸质出版日期:2016-09
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覃连敬, 李美丽, 蒋岚, 等. 广州地区大气环境气溶胶样品放射性特征[J]. 核技术, 2016,39(9):090501
Lianjing QIN, Meili LI, Lan JIANG, et al. Radioactivity characteristics of atmospheric aerosol samples in Guangzhou[J]. Nuclear techniques, 2016, 39(9): 090501
覃连敬, 李美丽, 蒋岚, 等. 广州地区大气环境气溶胶样品放射性特征[J]. 核技术, 2016,39(9):090501 DOI: 10.11889/j.0253-3219.2016.hjs.39.090501.
Lianjing QIN, Meili LI, Lan JIANG, et al. Radioactivity characteristics of atmospheric aerosol samples in Guangzhou[J]. Nuclear techniques, 2016, 39(9): 090501 DOI: 10.11889/j.0253-3219.2016.hjs.39.090501.
对广州地区大气环境气溶胶样品的总
α
、总
β
、
210
Pb、
210
Po和
7
Be进行了为期两年采样监测,分别得到各监测项目年平均放射性活度浓度分别为 0.12 mBq·m
-3
、0.75mBq·m
-3
、0.93 mBq·m
-3
、0.23 mBq·m
-3
、3.16mBq·m
-3
。总α、总β、
210
Pb、
210
Po和
7
Be活度浓度变化有明显的季节性特征:总α、总β、
210
Pb、
210
Po、
7
Be活度浓度最低值均出现在9月,总α、总β活度浓度最高值出现在11月,
210
Pb、
210
Po活度浓度峰值出现在2月,
7
Be活度浓度峰值出现在1月,总体呈现出冬春高、夏秋低的特点;
210
Pb、
210
Po、
7
Be与PM10、PM2.5有较强正相关性,但
210
Pb、
210
Po倾向于与比表面积更大的PM2.5结合,而
7
Be更易附着在较大粒径的PM10 上。
Background
2
As an important content of radiation environmental monitoring in China
the atmospheric aerosol radioactive level has attracted much attention.
Purpose
2
This study aims to find out variation regularity and affecting factors of radionuclide concentrations in atmospheric aerosol.
Methods
2
The radioactivity concentrations of total
α
total
β
210
Pb
210
Po and
7
Be in the atmosphere of Guangzhou urban were determined from January 2014 to December 2015.
Results
2
The annual average concentrations of total α
total β
210
Pb
210
Po and
7
Be were 0.12mBq·m
-3
0.75 mBq·m
-3
0.93 mBq·m
-3
0.23 mBq·m
-3
3.16 mBq·m
-3
respectively.All of the minimum monitoring data occurred in September
however
the lowest activity period for each item was not the same
and the total α
total β appeared in November
210
Pb
210
Po appeared in February
and
7
Be was in January.
Conclusion
2
The radioactivity concentrations reflected obvious seasonal trends.
210
Pb
210
Po and
7
Be had the strong correlation with PM10 and PM2.5.
210
Pb
210
Po intended to be absorbed on PM2.5 rather than PM10
while
7
Be showed an opposite result.
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