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Sixteen samples of mosses and soils were taken over an area of 9000 km2 in North-West Piedmont to assess air quality, identify sources and the fluxes of trace elements in deposition.

For mosses, the first 3 cm apical of the caulis were analyzed; for soil samples, the top 5 cm of the mineral horizons were assessed after the litter layer was removed.

The concentration of Al, As, Bi, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Sb, Sc, Ti, Tl, Vand Zn in mosses and soil were measured with an ICP-MS. The total Hg was analyzed by SAA.

The results show that average concentration of soil does not exceed the value of D.M 471/99 for public and private green places, while the spatial distribution is almost heterogeneous for Co, Cu, Cr, Ni and Sb. The moss analyses show an area with moderate anthropic pressures with mean values similar to other Italian regions.

With regard to the source of considered elements, Cd, Mo, Sb and Zn are derived by human activity, while Hg and Cu are less influenced. The other elements have a natural origin and are not influenced by human activity.

The mean flux of deposition (g of element hectare{-l} year{-l})are: As 3.1; Bi .011; Cd 0.8; Co 1.4; Cr 5.6; Cu 22;Hg 0.13; Mn 186; Mo 10; Ni 15; Pb 12; Sb 1.8; Sc 1.1, Ti 182; Tl 0.1; V 8 and Zn 177. They are very similar to mean European values of mosses and deposition collectors.

Additional information

Authors: NAPPI P, ARPA Piemonte, Torino (IT);BARBERIS R, ARPA Piemonte, Torino (IT);CENCI R M, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra (IT);DABERGAMI D, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra (IT)
Bibliographic Reference: An oral paper given at: Societa' Italiana.della Scienza del Suolo. Convegno Annuale. Conservazione della risorsa suolo Organised by: Societa' Italiana della Scienza del Suolo and Unlversita' di Piacenza Held at: Piacenza, 8-10 June 2002
Availability: Available from European Commission, JRC Knowledge Management Unit, Ispra (IT) Tel: +39 033278 9843 or +39 033278 9864 Fax: +39 033278 9623 E-mail:
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