首页|Assessing the availability of trace metals including rare earth elements in deep ocean waters of the Clarion Clipperton Zone, NE Pacific: Application of an in situ DGT passive sampling method
Assessing the availability of trace metals including rare earth elements in deep ocean waters of the Clarion Clipperton Zone, NE Pacific: Application of an in situ DGT passive sampling method
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NSTL
Elsevier
Geochemical behaviour and bioavailability of trace metals are closely related to their physical fractionation and chemical speciation. The DGT speciation technique allows the challenging assessment of labile concentrations of Mn, Cd, Cu, Ni, V, As, and rare earth elements and yttrium (REY) in ocean waters. In this first deep-water in situ study of DGT lability, we demonstrate the approach in bottom waters of the Clarion Clipperton Zone in the central NE Pacific. In the dissolved fraction (<0.2 mm), 70% to 100% of Cd, Ni, V, and REY, but only 25% of Cu and less than 50% of As were determined, reflecting their prevailing dominance of organic vs. inorganic complexation. This study demonstrates the applicability and sensitivity of DGT passive samplers for trace metals as a suitable technique for monitoring of anthropogenic activities, such as deep seabed mining, as well as for natural process studies in abyssal environments.(c) 2022 Published by Elsevier B.V.
Trace metal speciationLabile trace metalsRare earth elementsDGT passive samplerDeep oceanMarine trace metal geochemistryDIFFUSIVE GRADIENTSTHIN-FILMSINORGANIC SPECIATIONORGANIC-LIGANDSCOMPLEXATIONCOPPERPARTICULATECADMIUMYTTRIUMLABILE
Schmidt, Katja、Paul, Sophie A. L.、Achterberg, Eric P.
NSTL
Elsevier
