Publication Type Journal Article
Title Platinum and rhodium in Tagus estuary, SW Europe: sources and spatial distribution
Authors Carlos E. Monteiro Margarida Correia dos Santos Antonio Cobelo-Garcia P. Brito Miguel Caetano
Groups Chem4Env
Journal ENVIRONMENTAL MONITORING AND ASSESSMENT
Year 2019
Month September
Volume 191
Number 9
Pages
Abstract The spatial distribution of Pt and Rh was assessed in Tagus estuary and their sources discussed. Both elements were analysed in superficial sediment samples (n = 72) by adsorptive cathodic stripping voltammetry. Concentrations varied within the following ranges: 0.18-5.1 ng Pt g(-1) and 0.02-1.5 ng Rh g(-1). Four distinct areas were established: reference ; waste- and pluvial water discharge; motorway bridges and industrialised areas. The calculated reference median concentrations were 0.55 ng Pt g(-1) and 0.27 ng Rh g(-1). Linear relationships were found between Pt and Al, Fe and LOI, whereas Rh depicted scattered patterns. The highest concentrations were found nearby industrialised areas and a motorway bridge, corresponding to the enrichment of 10 and 6 times the background of Pt and Rh, respectively. The main sources of contamination to the Tagus estuary derived from historical and present industrial activities and from automotive catalytic converters. Large variations of Pt/Rh ratio (0.48-39) point to different sources, reactivity and dilution effects.
DOI http://dx.doi.org/10.1007/s10661-019-7738-z
ISBN
Publisher SPRINGER
Book Title
ISSN 0167-6369
EISSN 1573-2959
Conference Name
Bibtex ID ISI:000482401100001
Observations
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