Influence of dissolved organic matter on rare earth elements and yttrium distributions in coastal waters

Censi, P; Zuddas, P; Randazzo L., A; Saiano, F; Mazzola, S; Aricò, P; Cuttitta, A; Punturo, Rosalda

Yttrium and Rare Earth Elements (YREE) distribution in an anthropised coastal system was 19 carried out for the first time in Mediterranean Sea by means of geochemical features of shale20 normalised REE patterns both in dissolved and in suspended particulate matter (SPM). 21 Geochemical characters of the investigated area were recognised based on shape evaluation of 22 shale-normalised patterns and [La/Lu]n, [Tb/Lu] n, [La/Sm] n ratios, Ce anomaly values, Y/Ho 23 ratio, dissolved Fe and chlorophyll-α contents. 24 Obtained results evidenced that the main REE source in the whole gulf is atmospheric fallout, 25 probably from Sahara desert. Weathering of these materials is mirrored by dissolved Fe Page 1 of 42 URL: http://mc.manuscriptcentral.com/gche Chemistry and Ecology 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 For Peer Review Only concentrations and Y/Ho ratio in outer-gulf waters, whereas geochemical characters 26 of inner-gulf 27 waters suggest a further trace elements source. 28 Fe delivery from atmospheric particulate could determine a fertilisation effect of the studied 29 area, inducing an increase of chlorophyll-α allowing to a suppression of Ce anomaly respect to 30 values recognised in water masses of Central Mediterranean Sea. This evidence suggests that REE 31 organic complexation is a key factor controlling REE distributions at least in anthropised coastal 32 areas, as also corroborated by lack of significant tetrad effects recognised in behaviour of apparent 33 distribution coefficients calculated between suspended particulates and seawater.

Titolo:	Influence of dissolved organic matter on rare earth elements and yttrium distributions in coastal waters
Autori interni:	CENSI P ZUDDAS P RANDAZZO L. A SAIANO F MAZZOLA S ARICÒ P CUTTITTA A PUNTURO, Rosalda mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2010
Rivista:	CHEMISTRY IN ECOLOGY
Handle:	http://hdl.handle.net/20.500.11769/7960
Appare nelle tipologie:	1.1 Articolo in rivista

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http://hdl.handle.net/20.500.11769/7960

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