Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-5905-2018 |
Global evaluation and calibration of a passive air sampler for gaseous mercury | |
McLagan, David S.1; Mitchell, Carl P. J.1; Steffen, Alexandra2; Hung, Hayley2; Shin, Cecilia2; Stupple, Geoff W.2; Olson, Mark L.3; Luke, Winston T.4; Kelley, Paul4; Howard, Dean5; Edwards, Grant C.5; Nelson, Peter F.5; Xiao, Hang6; Sheu, Guey-Rong7; Dreyer, Annekatrin8; Huang, Haiyong1; Hussain, Batual Abdul1; Lei, Ying D.1; Tavshunsky, Ilana1; Wania, Frank1 | |
2018-04-26 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:8页码:5905-5919 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; USA; Australia; Peoples R China; Taiwan; Germany |
英文摘要 | Passive air samplers (PASs) for gaseous mercury (Hg) were deployed for time periods between 1 month and 1 year at 20 sites across the globe with continuous atmospheric Hg monitoring using active Tekran instruments. The purpose was to evaluate the accuracy of the PAS vis-a-vis the industry standard active instruments and to determine a sampling rate (SR; the volume of air stripped of gaseous Hg per unit of time) that is applicable across a wide range of conditions. The sites spanned a wide range of latitudes, altitudes, meteorological conditions, and gaseous Hg concentrations. Precision, based on 378 replicated deployments performed by numerous personnel at multiple sites, is 3.(6) +/- 3.(0) %(1), confirming the PAS's excellent reproducibility and ease of use. Using a SR previously determined at a single site, gaseous Hg concentrations derived from the globally distributed PASs deviate from Tekran-based concentrations by 14.(2) +/- 10 %. A recalibration using the entire new data set yields a slightly higher SR of 0.135(4) +/- 0.016 m(3) day(-1). When concentrations are derived from the PAS using this revised SR the difference between concentrations from active and passive sampling is reduced to 8.(8) +/- 7.(5) %. At the mean gaseous Hg concentration across the study sites of 1.54 ng m(-3), this represents an ability to resolve concentrations to within 0.13 ng m(-3). Adjusting the sampling rate to deployment specific temperatures and wind speeds does not decrease the difference in activepassive concentration further (8.(7) +/- 5.(7) %), but reduces its variability by leading to better agreement in Hg concentrations measured at sites with very high and very low temperatures and very high wind speeds. This value (8.(7) +/- 5.(7) %) represents a conservative assessment of the overall uncertainty of the PAS due to inherent uncertainties of the Tekran instruments. Going forward, the recalibrated SR adjusted for temperature and wind speed should be used, especially if conditions are highly variable or deviate considerably from the average of the deployments in this study (9.8(9) degrees C, 3.4(1) m s(-1)). Overall, the study demonstrates that the sampler is capable of recording background gaseous Hg concentrations across a wide range of environmental conditions with accuracy similar to that of industry standard active sampling instruments. Results at sites with active speciation units were inconclusive on whether the PASs take up total gaseous Hg or solely gaseous elemental Hg primarily because gaseous oxidized Hg concentrations were in a similar range as the uncertainty of the PAS. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430947500006 |
WOS关键词 | ATMOSPHERIC MERCURY ; AMBIENT AIR ; METEOROLOGICAL PARAMETERS ; ELEMENTAL MERCURY ; OXIDIZED MERCURY ; PAS-SIM ; DEPOSITION ; NETWORK ; SITES ; TROPOSPHERE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29460 |
专题 | 地球科学 |
作者单位 | 1.Univ Toronto Scarborough, Dept Phys & Environm Sci, Toronto, ON M1C 1A4, Canada; 2.Environm & Climate Change Canada, Air Qual Proc Res Sect, Toronto, ON M3H 5T4, Canada; 3.Natl Atmospher Deposit Network, Atmospher Mercury Network, Champaign, IL 61820 USA; 4.NOAA, Air Resources Lab, College Pk, MD 20740 USA; 5.Macquarie Univ, Dept Environm Sci, Sydney, NSW 2109, Australia; 6.Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China; 7.Natl Cent Univ, Dept Atmospher Sci, Taoyuan 32001, Taiwan; 8.Eurofins GfA, Air Monitoring, D-21107 Hamburg, Germany |
推荐引用方式 GB/T 7714 | McLagan, David S.,Mitchell, Carl P. J.,Steffen, Alexandra,et al. Global evaluation and calibration of a passive air sampler for gaseous mercury[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(8):5905-5919. |
APA | McLagan, David S..,Mitchell, Carl P. J..,Steffen, Alexandra.,Hung, Hayley.,Shin, Cecilia.,...&Wania, Frank.(2018).Global evaluation and calibration of a passive air sampler for gaseous mercury.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(8),5905-5919. |
MLA | McLagan, David S.,et al."Global evaluation and calibration of a passive air sampler for gaseous mercury".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.8(2018):5905-5919. |
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