Naslov
First indication of platinum input into the southern North Sea via German rivers

Autori
Hollister Adrienne ; Marcinek Saša ; Schulte Mai-Brit ; Omanović Dario ; Koschinsky Andrea

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Skup
ASLO Aquatic Sciences Meeting 2023

Mjesto i datum
Palma de Mallorca, Španjolska, 04.06.2023. - 09.06.2023

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Platinum ; Anthropogenic input ; Estuarine mixing

Sažetak
Platinum (Pt) is an emerging critical metal, but the long-term impact of Pt contamination remains largely unknown. The most common anthropogenic sources of Pt derive from use as a catalytic converter (deposited in road runoff) and as a cancer drug (excreted into sewage). We report, for the first time, Pt input from three major German rivers (Ems, Weser and Elbe) into the North Sea. Cruise M169 was conducted in December 2020 in the southern North Sea, from river endmembers (S = 0.4-0.5) to the more pristine Doggerbank region (S = 33-34). In addition, we followed a 12-h tidal cycle in each of the rivers. We found all three rivers to be a major source of Pt to the estuary, reaching a maximum of >6 pmol L-1 in the Weser endmember, compared to < 1 pmol L-1 near Doggerbank. In general, Pt concentrations followed a conservative distribution relative to salinity, although in the Elbe, an initial sharp drawdown at low salinity (S < 1.5) was observed, indicating particle adsorption and/or colloidal flocculation. All samples measured in the North Sea were elevated in Pt (≥ 0.5 pmol L-1) relative to open-ocean values (~0.2 pmol L-1). Further research is needed (e.g., size fractionation and particle analysis) to evaluate the sources of Pt (anthropogenic vs. naturally occurring) into north German rivers and North Sea.

Izvorni jezik
Engleski

Znanstvena područja
Interdisciplinarne prirodne znanosti

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