Simultaneous observation of seasonal variations of beryllium-7 and typical POPs in near-surface atmospheric aerosols in Guangzhou, China

文献类型： 外文期刊

第一作者： Pan, Jing

作者： Pan, Jing;Yang, Yong-Liang;Zhu, Xiao-Hua;Yang, Yong-Liang;Zhang, Gan;Shi, Jing-Lei;Li, Yong;Yu, Han-Qing

作者机构：

关键词： Beryllium-7;Aerosol;Persistent organic pollutants;Guangzhou;East Asia monsoon

期刊名称：ATMOSPHERIC ENVIRONMENT （ 影响因子：4.798； 五年影响因子：5.295 ）

ISSN： 1352-2310

年卷期： 2011 年 45 卷 20 期

页码：

收录情况： SCI

摘要： Near-surface atmospheric aerosol samples were collected at the sampling frequency of 2-3 d per week for one year from August 2006 to August 2007 at a low latitude station in Tianhe District, Guangzhou, Guangdong Province of southern China. The samples were analyzed for cosmogenic nuclide (7)Be and persistent organic pollutants, i.e. organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), and polybrominated diphenyl ethers (PBDEs). The annual average (7)Be concentration was 2.59 mBq m(-3), with the maximum occurred in May (8.45 mBq m(-3)) and minimum in late August and early September (0.07 mBq m(-3)). Winter and spring were the seasons in which the (7)Be concentrations were high while summer and autumn were the lower (7)Be seasons. Spring peaks in (7)Be in the near-surface atmospheric aerosols may have associated with the "spring leak maximum" episode. The annual average Sigma OCPs concentration was 345.6 pg m(-3), Sigma 33PCBs 317.6 pg m(-3), and Sigma 31PBDEs 609.0 pg m(-3). The variation trends in the time-series of (7)Be, OCPs, PCBs, and PBDEs in near-surface atmospheric aerosol showed both common features and differences. Significant correlations (R(2) = 0.957 and 0.811. respectively, p = 0.01) were observed between the monthly average (7)Be concentrations and those of Sigma PCBs and Sigma PBDEs in summer, autumn, and early winter. The difference between the seasonal variation features of OCPs and PCBs (and PBDEs) could be attributed to the different source functions and physical-chemical properties which could control the behaviors of these compounds in air-aerosol partitions as well as atmospheric transport. (C) 2011 Elsevier Ltd. All rights reserved.

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