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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2022
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| Online Access: | https://doi.org/10.1594/PANGAEA.944326 |
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| _version_ | 1867171314844827648 |
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| author | Paul, Sophie Anna Luise Schmidt, Katja Koschinsky, Andrea |
| author_facet | Paul, Sophie Anna Luise Schmidt, Katja Koschinsky, Andrea |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Physical and chemical trace metal speciation are important for our understanding of metal cycling and potential toxicity to marine life. Trace metals can have different bioavailability and behave differently in diffusion processes or particle-solution interactions depending on their physical and chemical forms. Here we investigated dissolved (< 0.2 µm) and soluble (< 0.02 µm) concentrations of Mn, Co, Cu, V, Mo, U, Cd, and As in oxic and suboxic deep-sea sediments of the central equatorial Pacific. Vanadium, Mo, U, Cd, and As showed no significant difference between the dissolved and soluble concentrations suggesting that they are present as inorganic ionic species or organic complexes either in the truly dissolved or small colloidal fraction. The same was true for Mn and Co in suboxic pore waters. In contrast, the colloidal fraction (> 0.02 µm < 0.2 µm) of Cu increased with depth. Samples were taken during the SO268 cruise to the German and Belgian license areas for polymetallic nodule mining in the Clarion Clipperton Fracture Zone as part of the MiningImpact project. Sediment cores were collected with multicorers (MUC), ROV push cores (PUC), and gravity corers (GC). Pore water was extracted by means of centrifugation and sequential filtration using cleaned polyethersulfone (PES) syringe filters (0.2 µm) and Anopore syringe filters (0.02 µm). Pore water was preserved by acidification to ~ pH 1.8 with concentrated ultrapure HCl. Samples were measured by Inductively Coupled Plasma-Mass Spectrometry. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_944326 |
| institution | PANGAEA |
| language | en |
| publishDate | 2022 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Dissolved and soluble pore water trace metals (Cd, U, V, Cu, As, Mo) from sediment core SO268/1_18-1 (MUC-04) during SONNE cruise SO268/1, central Pacific Paul, Sophie Anna Luise Schmidt, Katja Koschinsky, Andrea Arsenic; Arsenic, limit of detection; Cadmium; Cadmium, limit of detection; CCZ; Clarion-Clipperton Fraction Zone, North East Pacific Ocean; Copper; Copper, limit of detection; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; ICP-MS, Perkin-Elmer, Nexion 350x; ICP-MS, Perkin-Elmer, Nexion 350x, KED mode; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Molybdenum; Molybdenum, limit of detection; MUC; MUC-04; MultiCorer; Pacific; pore water; Sample code/label; size fractionation; SO268/1; SO268/1_18-1; Sonne_2; Station label; trace metals; Uranium; Uranium, limit of detection; Vanadium; Vanadium, limit of detection Physical and chemical trace metal speciation are important for our understanding of metal cycling and potential toxicity to marine life. Trace metals can have different bioavailability and behave differently in diffusion processes or particle-solution interactions depending on their physical and chemical forms. Here we investigated dissolved (< 0.2 µm) and soluble (< 0.02 µm) concentrations of Mn, Co, Cu, V, Mo, U, Cd, and As in oxic and suboxic deep-sea sediments of the central equatorial Pacific. Vanadium, Mo, U, Cd, and As showed no significant difference between the dissolved and soluble concentrations suggesting that they are present as inorganic ionic species or organic complexes either in the truly dissolved or small colloidal fraction. The same was true for Mn and Co in suboxic pore waters. In contrast, the colloidal fraction (> 0.02 µm < 0.2 µm) of Cu increased with depth. Samples were taken during the SO268 cruise to the German and Belgian license areas for polymetallic nodule mining in the Clarion Clipperton Fracture Zone as part of the MiningImpact project. Sediment cores were collected with multicorers (MUC), ROV push cores (PUC), and gravity corers (GC). Pore water was extracted by means of centrifugation and sequential filtration using cleaned polyethersulfone (PES) syringe filters (0.2 µm) and Anopore syringe filters (0.02 µm). Pore water was preserved by acidification to ~ pH 1.8 with concentrated ultrapure HCl. Samples were measured by Inductively Coupled Plasma-Mass Spectrometry. |
| title | Dissolved and soluble pore water trace metals (Cd, U, V, Cu, As, Mo) from sediment core SO268/1_18-1 (MUC-04) during SONNE cruise SO268/1, central Pacific |
| topic | Arsenic; Arsenic, limit of detection; Cadmium; Cadmium, limit of detection; CCZ; Clarion-Clipperton Fraction Zone, North East Pacific Ocean; Copper; Copper, limit of detection; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; ICP-MS, Perkin-Elmer, Nexion 350x; ICP-MS, Perkin-Elmer, Nexion 350x, KED mode; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Molybdenum; Molybdenum, limit of detection; MUC; MUC-04; MultiCorer; Pacific; pore water; Sample code/label; size fractionation; SO268/1; SO268/1_18-1; Sonne_2; Station label; trace metals; Uranium; Uranium, limit of detection; Vanadium; Vanadium, limit of detection |
| url | https://doi.org/10.1594/PANGAEA.944326 |