Fate of copper complexes in hydrothermally altered deep-sea sediments from the Central Indian Ocean Basin.

Fate of copper complexes in hydrothermally altered deep-sea sediments from the Central Indian Ocean Basin.

Environmental pollution (Barking, Essex : 1987) (2014-08-12)

Parthasarathi Chakraborty, Sylvia G Sander, Saranya Jayachandran, B Nagender Nath, G Nagaraju, Kartheek Chennuri, Krushna Vudamala, N Lathika, Maria Brenda L Mascarenhas-Pereira

PMID25108489

ZUSAMMENFASSUNG

The current study aims to understand the speciation and fate of Cu complexes in hydrothermally altered sediments from the Central Indian Ocean Basin and assess the probable impacts of deep-sea mining on speciation of Cu complexes and assess the Cu flux from this sediment to the water column in this area. This study suggests that most of the Cu was strongly associated with different binding sites in Fe-oxide phases of the hydrothermally altered sediments with stabilities higher than that of Cu-EDTA complexes. The speciation of Cu indicates that hydrothermally influenced deep-sea sediments from Central Indian Ocean Basin may not significantly contribute to the global Cu flux. However, increasing lability of Cu-sediment complexes with increasing depth of sediment may increase bioavailability and Cu flux to the global ocean during deep-sea mining.

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

266086

Sigma-Aldrich

Kupfer, powder, <425 μm, 99.5% trace metals basis

349178

Sigma-Aldrich

Kupfer, foil, thickness 0.25 mm, 99.98% trace metals basis

203122

Sigma-Aldrich

Kupfer, powder, 99.99% trace metals basis

207780

Sigma-Aldrich

Kupfer, powder, <75 μm, 99%

349216

Sigma-Aldrich

Kupfer, wire, diam. 1.0 mm, ≥99.9%

774111

Sigma-Aldrich

Kupfer, nanopowder, 40-60 nm particle size (SAXS), ≥99.5% trace metals basis

326453

Sigma-Aldrich

Kupfer, powder (spheroidal), 10-25 μm, 98%

357456

Sigma-Aldrich

Kupfer, powder (dendritic), <45 μm, 99.7% trace metals basis

349208

Sigma-Aldrich

Kupfer, foil, thickness 0.025 mm, 99.98% trace metals basis

61139

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Kupfer, turnings, purum p.a., ≥99.0%

774103

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Kupfer, nanopowder, 60-80 nm particle size (APS), ≥99.5% trace metals basis

311405

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Kupfer, ACS reagent, granular, 10-40 mesh, ≥99.90%

254177

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Kupfer, beads, 2-8 mm, 99.9995% trace metals basis

12816

Sigma-Aldrich

Kupfer, foil, ≥99.8% (complexometric)

266744

Sigma-Aldrich

Kupfer, foil, thickness 1.0 mm, 99.999% trace metals basis

GF66556491

Kupfer, mesh, 100x100mm, nominal aperture 0.14mm, thickness 0.25mm, wire diameter 0.115mm, 100x100 wires/inch, open area 30.3%, plain weave mesh

349151

Sigma-Aldrich

Kupfer, foil, thickness 0.5 mm, 99.98% trace metals basis

326429

Sigma-Aldrich

Kupfer, wire, diam. 0.25 mm, 99.999% trace metals basis

223409

Sigma-Aldrich

Kupfer, shot, −3-+14 mesh, 99%

326488

Sigma-Aldrich

Kupfer, beads, 2-8 mm, ≥99.99% trace metals basis

GF86528155

Kupfer, wire reel, 100m, diameter 0.05mm, annealed, 99.9%

349224

Sigma-Aldrich

Kupfer, wire, diam. 2.0 mm, 99.999% trace metals basis

326410

Sigma-Aldrich

Kupfer, wire, diam. 0.64 mm, 99.995% trace metals basis

GF90165023

Kupfer, sheet, 100x100mm, thickness 6.35mm, 99.95+%

GF37929134

Kupfer, rod, 500mm, diameter 2.0mm, as drawn, 99.99+%

GF50190027

Kupfer, rod, 1000mm, diameter 4.8mm, hard, 99.9%

GF00920898

Kupfer, rod, 100mm, diameter 9.5mm, hard, 99.9%

GF16694006

Kupfer, rod, 50mm, diameter 6.35mm, as drawn, 99.999%

GF14145689

Kupfer, mesh, 600x600mm, nominal aperture 0.38mm, wire diameter 0.25mm, 40x40 wires/inch, open area 37%, plain weave mesh

GF95621812

Kupfer, foil, 100x100mm, thickness 0.1mm, hard, 99.95+%