Influence of dissolved organic matter on Rare Earth Elements and Yttrium distributions in coastal waters

Filippo Saiano, Paolo Censi, Rosalda Punturo, Angela Cuttitta, Zuddas, Salvatore Mazzola, Paolo Censi, Loredana Antonella Randazzo, Pietro Arico'

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18 Citazioni (Scopus)

Abstract

Data collected during this study indicate that dissolved Y and Rare Earths (REE) behaviour can be monitored through shale-normalised ratios. Relationships occurring between these ratios suggest that leaching from lithogenic materials is the main source of REE in the studied area. This process involves riverine detrital matter in the inner area of the Gulf of Palermo. Features of shale-normalised patterns and the relationship recognised between dissolved Fe and Y/Ho suggest that REE are released from Fe-rich coatings of atmospheric dust. Observed similarities between dissolved Fe and chlorophyll-α contents suggest that leaching of Fe-rich atmospheric particulates induces a fertilisation of shallow water layers influencing the dissolved organic content. In turn, the increasing chlorophyll-α content causes a progressive decrease in amplitude of the negative Ce anomaly in seawater that is also observed in water in the Central Mediterranean Sea, suggesting that organic matter generally plays a key role in REE behaviour at the solid-liquid interface.Shale-normalised REE features recognised in suspended particulate matter (SPM) indicate the occurrence of three different fractions from lithogenic matter, biogenic carbonates and authigenic components, respectively. The latter is formed during REE scavenging onto the surface of detrital biogenic particles and is mainly recognised in inner gulf waters.
Lingua originaleEnglish
pagine (da-a)123-135
Numero di pagine13
RivistaCHEMISTRY IN ECOLOGY
Volume26
Stato di pubblicazionePublished - 2010

All Science Journal Classification (ASJC) codes

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  • ???subjectarea.asjc.2300.2303???
  • ???subjectarea.asjc.2300.2300???
  • ???subjectarea.asjc.1900.1900???

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