Τίτλος:
A microscopic and Synchrotron-based characterization of urban particulate matter (PM10-PM2.5 and PM2.5) from Athens atmosphere, Greece
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Urban particulate matter (PM10-PM2.5 and PM 2.5) from Athens (Greece) atmosphere, primarily investigated by SEM-EDS, was further studied in the FLUO and SUL-X beamlines of ANKA Synchrotron facility (KIT, Germany). The SR μ-XRF study showed both geological (e.g. CaTi, CaK and CaSrKRb) and anthropogenic particles exhibiting heavy metal combinations such as FeCo, FeCoCuV and ZnV. It was also revealed that very hazardous metalloids and heavy metals, namely As and Pb, are concentrated in isolated respirable (PM2.5) microparticles. It was attempted to investigate the oxidation state of As by means of μ-XANES. The As K-edge XANES spectrum of the sample shows a main peak at about 11.874 keV which matches adequately with the As(V) reference spectrum but part of the As seems to have a lower oxidation state (most probably As(III)). This is the first non-bulk study with regard to the partitioning and solid-state speciation of hazardous chemical elements in urban atmospheric microparticles from greater Athens area, rated as an alpha-world city with a population of ca. 4 million people. © 2011 Elsevier B.V. All rights reserved.
Συγγραφείς:
Godelitsas, A.
Nastos, P.
Mertzimekis, T.J.
Toli, K.
Simon, R.
Göttlicher, J.
Περιοδικό:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Λέξεις-κλειδιά:
Athens; Beam-lines; Germany; Greece; Hazardous chemicals; Metal combination; Micro-particles; Oxidation state; Particulate Matter; Reference spectrum; SEM-EDS; X ray fluorescence spectroscopy; XANES; XANES spectra, Arsenic; Chemical elements; Chemical speciation; Earth atmosphere; Fluorescence spectroscopy; Heavy metals; Lead; Metallic compounds; X ray absorption spectroscopy, Synchrotrons
DOI:
10.1016/j.nimb.2011.04.063
