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title Long-term monitoring of trace metals in PM10 and total gaseous mercury in the atmosphere of Porto, Portugal
authors Albuquerque, M; Coutinho, M; Rodrigues, J; Ginja, J; Borrego, C
author full name Albuquerque, M.; Coutinho, M.; Rodrigues, J.; Ginja, J.; Borrego, C.
title Long-term monitoring of trace metals in PM10 and total gaseous mercury in the atmosphere of Porto, Portugal
nationality internacional
language English
document type Article
author keywords Trace metals; Total gaseous mercury; Ambient air concentrations; Profiles; Long-term monitoring; Seasonality
abstract As part of a monitoring programme conducted by the Institute of Environment and Development (IDAD) and supported by the regional municipal solid waste (MSW) management authorities, an extensive database of trace metals (TMs) concentrations in ambient air was collected in two sites, Leca do Balio (LB) and Vila Nova da Telha (VNT), located in Porto's metropolitan area, north of Portugal. Since 2004, concentrations of As, Cd, Pb, Cu, Cr, Mn, Hg, Ni and Zn were measured in PM10. In addition, total gaseous mercury (TGM) was monitored since 2008. These measurements were used to assess long-term trends of concentrations. Statistical analysis was used to search for the possible origin of the TMs. During the monitoring period, the mean TMs concentrations followed the order: Zn > Cu > Pb > Mn > Cr > Ni > As approximate to Hg > Cd, and have not exceeded the current air quality guidelines values. Concentrations of As, Cd, Pb, Mn, and Hg have slightly decreased during the measurement period despite already being at historically low levels. The concentrations range of Zn, Cd, Pb and As suggests a seasonal variability for these elements in ambient air, for both sites. Average TGM levels were 1.93 and 1.35 ng n(-3), for LB and VNT respectively. In terms of seasonality, a statistical difference was found in TGM concentrations between winter and summer for LB. A daily pattern was also observed in TGM with minimum concentrations during the night and early morning. (C) 2017 Turkish National Committee for Air Pollution Research and Control. Production and hosting by Elsevier B.V. All rights reserved.
author address [Albuquerque, M.; Coutinho, M.; Rodrigues, J.; Ginja, J.; Borrego, C.] IDAD Inst Environm & Dev, Campus Univ, P-3810193 Aveiro, Portugal; [Borrego, C.] Univ Aveiro, Dept Environm & Planning, CESAM, P-3810193 Aveiro, Portugal
reprint address Albuquerque, M (reprint author), IDAD Inst Environm & Dev, Campus Univ, P-3810193 Aveiro, Portugal.
e-mail address martaalbuquerque@ua.pt
orcid number Ginja, Joao/0000-0001-5782-7808; Coutinho, Miguel/0000-0002-3122-4555
funding agency and grant number LIPOR-Sistema Inter-municipal de Tratamento de Lixos da Regiao do Porto
funding text The authors gratefully acknowledge
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cited reference count 65
publisher city BUCA
issn 1309-1042
29-character source abbreviation ATMOS POLLUT RES
iso source abbreviation Atmos. Pollut. Res.
publication date MAY
year published 2017
volume 8
issue 3
beginning page 535
ending page 544
digital object identifier (doi) 10.1016/j.apr.2016.12.001
subject category 10
document delivery number Environmental Sciences
unique article identifier Environmental Sciences & Ecology
CESAM authors