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

被引：23

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.

引用

页码：35 / 42

页数：8

共 38 条

[1] Relationship between variations of 7Be, 210Pb and 212Pb concentrations and sub-regional atmospheric transport: Simultaneous observation at distant locations [J].