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ENVIRONMENTAL GEOCHEMISTRY: ANTHROPOGENIC SOURCES AND CLIMATE CHANGES ASSESSMENT

 

rei7Geochemical approaches including elemental composition (major, minor and trace constituents), organic and isotopic (δ13C, δ15N) determinations and dating techniques (14C) in different environments to establish sea level and climatic changes, and effects of Human intervention in the landscape.

Recent research was focused in soils, sediments and waters collected at remote areas (Fildes Bay - Antarctica) and in radiocarbon dated sediment cores from tidal marshes located at the Portuguese coastal area.

Elemental distribution patterns determined by ICP-MS and EDXRF allowed: 1. the identification of several contaminated hotspots (high levels of Cu, Zn, Pb, Cd, Cr and Ni) and the evaluation of the current and historical trace element contamination in Fildes Bay, a pristine environment in Antarctica; 2. the establishment of a clear linkage between the bromine downcore distribution patterns and the organic matter cycling related  to solar activity (climatic fluctuations)in sediment cores from tidal marshes along the Portuguese coastal area.

 

Contact person: 

M. Fatima Araújo, (.pt)

 

References:

J. Moreno, F. Fatela, E. Leorri, F. Moreno, J.J. Gómez-Navarro, M.F. Araújo, M.C. Freitas, R.M. Trigo (2017). Bromine soil/sediment enrichment in tidal salt marshes as a potential indicator of climate changes driven by solar activity: New insights from W coast Portuguese estuaries. Science of the Total Environment, 580, 324-338. doi: 10.1016/j.scitotenv.2016.11.130.

A. Padeiro, E. Amaro, M. M. C. dos Santos, M. F. Araújo, S. S. Gomes, M. Leppe, K. Hughes, H.-P. Ulrich, J. Canário (2016). Trace element contamination and availability in Fildes Peninsula, King George Island, Antarctic. Environmental Science: Processes & Impacts, 18, 648 – 657. (DOI:  10.1039/C6EM00052E). 

J.M. de la Rosa, J.M. Martins, A.M. Soares, M.F. Araújo (2015). Assessment of distribution and sources of pyrogenic carbon in the lower course of the Guadiana River (SW Iberian Peninsula). Journal of Soils and Sediments. 15/4, 759-768. doi:10.1007/s11368-015-1092-8. WOS:000351516400003.