The effect of air mass origin on the ambient concentrations of 7Be and 210Pb in Islamabad, Pakistan

被引：22
|
作者：
Ali, N. [1 ,2 ]
Khan, E. U. [3 ]
Akhter, P. [4 ]
Khattak, N. U. [5 ]
Khan, F. [6 ]
Rana, M. A. [1 ]
机构：
[1] PINSTECH, PD, Islamabad, Pakistan
[2] PIEAS, DPAM, Islamabad, Pakistan
[3] Int Islamic Univ Islamabad, Dept Phys, Islamabad, Pakistan
[4] PINSTECH, HPD, Islamabad, Pakistan
[5] Univ Peshawar, Natl Ctr Excellence Geol, Peshawar, Pakistan
[6] CIIT Ctr Hlth Res, Dept Phys, Islamabad, Pakistan
来源：
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY | 2011年 / 102卷 / 01期
关键词：
Radionuclides; Spectroscopy; Scavenging; Aerosols (Pb-210 and Be-7); Concentration; Vertical mixing; SURFACE AIR; DEPOSITION VELOCITIES; SEASONAL-VARIATIONS; BERYLLIUM-7; FLUXES; VARIABILITY; AEROSOLS; RA-226; RATIOS;
D O I：
10.1016/j.jenvrad.2010.08.010
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Concentration of radionuclides Pb-210 and Be-7, having half lives of 22.3 years and 53.29 days, respectively, in the surface air samples of Islamabad (33.38 degrees N, 73.10 degrees E and Altitude similar to 536 m asl.) are measured. The non-destructive technique of gamma-spectrometry, with a high purity germanium HPGe detector, was employed for the analysis of all samples. The annual average concentrations of Pb-210 and Be-7 in the surface air samples were determined as 0.284 +/- 0.15 and 3.171 +/- 1.14 mBq m(-3), respectively. Our results have shown a seasonal variation of the concentration of 7Be in air samples with high values for the spring season. High concentrations for Pb-210 are obtained when air masses originate from plain areas of Pothohar region, located in the South-West, West and North West of Islamabad. Our values of concentrations show a nice agreement with the relevant reported results. (C) 2010 Elsevier Ltd. All rights reserved.
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收藏
页码：35 / 42
页数：8
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