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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:07 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Temporal trend analysis of major heavy metals in particulate matter PM10 across Romania
Authors:
Catalin PATRAS (1), Elena Alina OLARU (2), Gabriela IORGA (3)
Affiliation:
1) University of Bucharest, Faculty of Physics, P.O.Box. MG-11, Magurele, Bucharest, Romania
2) University of Bucharest, Faculty of Biology, Department of Systems Ecology and Sustainability, Spl. Independentei 91-95, 050095 Bucharest, Romania
3) University of Bucharest, Department of Physical Chemistry, Bd. Regina Elisabeta 4-12, 030018, Bucharest, Romania
E-mail
pg_cata2006@yahoo.com
Keywords:
temporal trends, East Europe, particulate matter, heavy metals, PM10, Pb, Cd, Ni, As
Abstract:
Annual air pollution level of PM10 (particulate matter samples less than 10 µm), lead (Pb), cadmium (Cd), nickel (Ni), and arsenic (As) was assessed at 11 industrial monitoring sites across Romania in order to investigate the variability and compliance with the EU regulations. Availability of the data series is site- and pollutant-dependent and varies from 4 years for cadmium and nickel at Zlatna and Targoviste sites to 12 years for lead at Baia Mare (2001-2012). The longest time series corresponds to PM10 at Bucharest industrial sites (11 years) covering the period from 2004 to 2014. The present study reports the first analysis of long-term continuous daily record of major heavy metals content in PM10 samples in order to determine if temporal trends could be revealed. Temporal trend analysis for detecting and estimating a monotonic trend was performed by the non–parametric Mann–Kendall’s test and Sen’s method applied for both the annual and seasonal average mass concentrations levels. Starting with systematic exceedances of the daily limit values in earlier monitoring period for PM10 and heavy metals, we observed negative trends for all main pollutants at majority of sites. Our results indicate the sharpest annual declines at Baia Mare for PM10 with -3.8% yr-1, with -0.44% yr-1 for Pb, with -0.38% yr-1 for Cd. Nickel shows stable trends at Zlatna and Bacau, whereas at Slatina it is more probable to decrease. At Zlatna, stability is also associated to arsenic levels.This study also explores the temporal trends of PM10 and metal emissions at the country scale, for the corresponding time periods of their monitored ambient mass concentrations. Our results presents an up-to-date general view of evolution of PM10 and major heavy metals content at Romanian scale and contribute to the incomplete information of heavy metals air pollution in East Europe.
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