DOI: 10.1016/j.atmosenv.2015.10.044
Scopus记录号: 2-s2.0-84945277848
论文题名: Atmospheric 210Pb and anthropogenic trace metals in the continental outflow to the Bay of Bengal
作者: Bikkina S ; , Sarin M ; M ; , Chinni V
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122 起始页码: 737
结束页码: 747
语种: 英语
英文关键词: Aerosols
; Bay of Bengal
; Indo-Gangetic Plain
; Ocean biogeochemistry
; Pb210
; Trace metals
Scopus关键词: Aerosols
; Atmospheric aerosols
; Atmospheric boundary layer
; Atmospheric chemistry
; Biogeochemistry
; Boundary layer flow
; Boundary layers
; Cadmium
; Copper
; Lead
; Manganese
; Metals
; Nickel
; Radon
; Surface waters
; Trace analysis
; Trace elements
; Bay of Bengal
; Indo-Gangetic Plains
; Ocean biogeochemistry
; Pb210
; Trace metal
; Pollution
; cadmium
; chemical compound
; chromium
; cobalt
; copper
; lead
; lead 210
; manganese
; nickel
; radon 222
; sea water
; surface water
; trace metal
; zinc
; aerosol
; anthropogenic effect
; anthropogenic source
; biogeochemistry
; boundary layer
; concentration (composition)
; outflow
; particulate matter
; sea surface
; toxicity
; trace metal
; Article
; biogeochemistry
; boundary layer
; cluster analysis
; controlled study
; dry deposition
; particulate matter
; priority journal
; sea
; Bay of Bengal
; Gangetic Plain
; Indian Ocean
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Atmospheric 210Pb and trace metals (Pb, Cd, Cu, Mn, Cr, Co, Ni and Zn) have been studied in fine mode aerosols (PM2.5) from a sampling site (Kharagpur: 22.3°N, 87.3°E) in the Indo-Gangetic Plain (IGP) during the continental outflow (November-March) to the Bay of Bengal (BoB). The aerosol 210Pb activity (1.3-6.6 mBq m-3) is significantly high in the wintertime (December-January) compared to model based data in the literature. The cause for higher 210Pb activity is attributed to enhanced 222Rn emanation from Alluvium in the IGP as well as lower boundary layer height. The trace metal concentrations (in ng m-3) also exhibit pronounced temporal variability (Pb: 8-296, Mn: 8-568, Cr: 4.5-33, Cu: 2.1-29.3, Ni: 2.3-14.3, Co: 0.5-1.6 and Cd: 1-29.5) and are of comparable magnitude with those documented over the BoB (Srinivas and Sarin, 2013b), suggesting dominant impact of IGP-outflow on marine atmospheric boundary layer. The enrichment factors (EFcrust) of Pb, Cd, Cu, Mn, Cr, Co and Ni in PM2.5, relative to upper continental crust, varied as 105-1561, 1265-24006, 13-87, 3-99, 7-27, 3-19 and 9-27, respectively. Significant linear relationship among trace metals and chemical species (non-sea-salt-K+, nss-SO4 2- and EC) emphasizes their anthropogenic source. The high concentrations and EFcrust of Pb, Cd and Cu, together with residence time of PM2.5 (2-13 days, assessed from 210Pb) in the IGP-outflow has implications to increase in the aerosol toxicity and their impact on biogeochemistry of ocean surface waters via air-sea deposition. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81445
Appears in Collections: 气候变化事实与影响
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作者单位: Physical Research Laboratory, Ahmedabad, India
Recommended Citation:
Bikkina S,, Sarin M,M,et al. Atmospheric 210Pb and anthropogenic trace metals in the continental outflow to the Bay of Bengal[J]. Atmospheric Environment,2015-01-01,122