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Title	PM10-bound trace elements in pan-European urban atmosphere
ID_Doc	65200
Authors	Liu, XS; Zhang, X; Wang, T; Jin, BW; Wu, LJ; Lara, R; Monge, M; Reche, C; Jaffrezo, JL; Uzu, G; Dominutti, P; Darfeuil, S; Favez, O; Conil, S; Marchand, N; Castillo, S; de la Rosa, JD; Stuart, G; Eleftheriadis, K; Diapouli, E; Gini, MI; Nava, S; Alves, C; Wang, XX; Xu, YM; Green, DC; Beddows, DCS; Harrison, RM; Alastuey, A; Querol, X
Title	PM10-bound trace elements in pan-European urban atmosphere
Year	2024
Published
Abstract	Although many studies have discussed the impact of Europe's air quality, very limited research focused on the detailed phenomenology of ambient trace elements (TEs) in PM10 in urban atmosphere. This study compiled long-term (2013-2022) measurements of speciation of ambient urban PM10 from 55 sites of 7 countries (Switzerland, Spain, France, Greece, Italy, Portugal, UK), aiming to elucidate the phenomenology of 20 TEs in PM10 in urban Europe. The monitoring sites comprised urban background (UB, n = 26), traffic (TR, n = 10), industrial (IN, n = 5), suburban background (SUB, n = 7), and rural background (RB, n = 7) types. The sampling campaigns were conducted using standardized protocols to ensure data comparability. In each country, PM10 samples were collected over a fixed period using high-volume air samplers. The analysis encompassed the spatio-temporal distribution of TEs, and relationships between TEs at each site. Results indicated an annual average for the sum of 20 TEs of 90 +/- 65 ng/m(3), with TR and IN sites exhibiting the highest concentrations (130 +/- 66 and 131 +/- 80 ng/m(3), respectively). Seasonal variability in TEs concentrations, influenced by emission sources and meteorology, revealed significant differences (p < 0.05) across all monitoring sites. Estimation of TE concentrations highlighted distinct ratios between non-carcinogenic and carcinogenic metals, with Zn (40 +/- 49 ng/m(3)), Ti (21 +/- 29 ng/m(3)), and Cu (23 +/- 35 ng/m(3)) dominating non-carcinogenic TEs, while Cr (5 +/- 7 ng/m(3)), and Ni (2 +/- 6 ng/m(3)) were prominent among carcinogenic ones. Correlations between TEs across diverse locations and seasons varied, in agreement with differences in emission sources and meteorological conditions. This study provides valuable insights into TEs in pan-European urban atmosphere, contributing to a comprehensive dataset for future environmental protection policies.
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