Spatial trends in heavy metals and nitrogen deposition in Navarra (Northern Spain) based on moss analysis |
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| Authors: | L González-Miqueo D Elustondo E Lasheras R Bermejo J M Santamaría |
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| Institution: | 1.Laboratorio Integrado de Calidad Ambiental (LICA), Departamento de Química y Edafología,Universidad de Navarra,Pamplona,Spain |
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| Abstract: | A biomonitoring survey using the moss species Hypnum cupressiforme Hedw. was performed in the North of Navarra (Spain) in 2006. The levels of V, Cr, Mn, Ni, Cu, Zn, As, Zr, Cd, Hg and Pb,
and the total nitrogen content were determined in the samples by means of ICP-MS, CV-AA, and the Kjeldahl method. PCA analysis
showed a differentiation between lithogenic (V, Cr, Mn, Ni, As and Zr) and anthropogenic elements (Mn, Cu, Zn, Cd, Hg and
Pb). Spatial distribution maps were drawn using the kriging method, in order to identify the most affected areas and the main
pollution sources. A similar spatial distribution was observed for the elements belonging to each group separated by the PCA,
showing an important contribution from metal industries located in the Basque Country, as well as influence of long-range
transboundary pollution processes. Background levels were also determined for the study area, along with the contamination
factor for the different elements analysed. Mosses seemed to be good biomonitors of N deposition in areas of accumulation. |
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