E3S Web of Conferences
Volume 1, 2013Proceedings of the 16th International Conference on Heavy Metals in the Environment
|Number of page(s)||3|
|Section||Heavy Metals in the Atmosphere II: “Global/Continental/Oceanic Scales”|
|Published online||23 April 2013|
Evaluation of the nanoparticles contribution to elemental concentration in airborne particulate matter
1 Chemistry Department, Sapienza University of Rome, 00185 Rome, ITALY
2 Institute of Atmospheric Pollution (IIA), C.N.R., 00016 Monterotondo, Rome, ITALY
A method for estimating the contribution of nanoparticles (NPs) to the elemental concentration in airborne particulate matter (PM) is described. The results related to size-segregated samples collected at an urban site show that significant concentrations of Sb, Cd, Pb, As, V and Sn are present in the fine fraction of PM as complex structures in which NPs are aggregated or included in other materials. These structures are easily broken in water media by the application of ultrasounds, leading to a stable suspension of insoluble NPs. The contribution of NPs can be evaluated as the difference between the inductively coupled plasma (ICP-MS) analysis before and after the elution of the stable NPs suspension from an ion exchange cartridge.
Key words: nanoparticles / elements / airborne particulate matter / dimensional distribution
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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