Assessment of essential elements and heavy metals content on Mytilus galloprovincialis from river Tagus estuary.
Trace elemental content was analysed in edible tissues of Mytilus galloprovincialis collected in five different sampling areas near the mouth of river Tagus estuary in Lisbon. The concentrations of essential elements (S, K, Ca, Fe, Cu, Zn, As, Br and Sr) were determined by energy-dispersive X-ray fluorescence (EDXRF) spectrometry, while toxic elements (Cr, Cd, Hg, Se and Pb) were measured by inductively coupled plasma-atomic emission spectrometry (ICP-AES). The results show that the essential elements K and S are present at the highest concentrations in all the studied samples reaching 2,920 and 4,520 μg g(-1) (fresh weight), respectively. The highest levels of heavy metals found were in two areas close to the city for Pb and Cd, but below the maximum allowed values.
CFA, Departamento de Física, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal.
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Santos
M S
MS
Diniz
M L
ML
Carvalho
J P
JP
Santos
D000818:Animals; D002104:Cadmium / Q000032:analysis; D002857:Chromium / Q000032:analysis; D004784:Environmental Monitoring; D063366:Estuaries; D007854:Lead / Q000032:analysis; D008628:Mercury / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis*; D049878:Mytilus / Q000378:metabolism*; D011188:Potassium / Q000032:analysis; D045483:Rivers; D012643:Selenium / Q000032:analysis; D013057:Spectrum Analysis; D014131:Trace Elements / Q000032:analysis*
D019216:Metals, Heavy; D014131:Trace Elements; D002104:Cadmium; D002857:Chromium; D007854:Lead; D008628:Mercury; D012643:Selenium; D011188:Potassium