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Distribution and speciation of dissolved zinc in the western North Pacific and its adjacent seas
- Source :
- Marine Chemistry. 173:330-341
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- Total dissolved zinc (Zn) and its speciation was investigated by cathodic stripping voltammetry (CSV) in the western North Pacific and its marginal seas, the Sea of Okhotsk and the Sea of Japan (East Sea). In these high latitude areas, Zn complexing ligands in most samples were saturated with zinc because of the high dissolved Zn concentration. Relatively high total ligand concentrations (C L ) and relatively low conditional stability constants ( K Z n L , Z n 2 + ′ ) have been obtained in the surface waters of the Sea of Okhotsk (C L = 2.6 nM, log K Z n L , Z n 2 + ′ = 9.5) and the Sea of Japan (East Sea) (C L = 1.3 nM, log K Z n L , Z n 2 + ′ = 9.1) compared with those in the open ocean (subtropical and subarctic North Pacific, C L = 0.2–1.2 nM, log K ' Z n L , Z n 2 + = 9.1–10.8). The fraction of Zn labile in the deep waters of the Sea of Okhotsk was relatively small (34–38%, > 1479 m), which might indicate the presence of high concentrations of Zn complexing ligands in deep waters of the Sea of Okhotsk. In the western North Pacific, positive relationships were obtained between total ligand and chlorophyll a concentrations, suggesting that Zn complexing ligands in the surface water might be derived from bacteria and phytoplankton in the western North Pacific. However, relatively high concentrations of the ligands exist in low chlorophyll- a surface water in the Sea of Okhotsk and the Sea of Japan (East Sea), implying that Zn complexed ligands in those marginal seas have a different origin.
- Subjects :
- Chlorophyll a
media_common.quotation_subject
chemistry.chemical_element
Pelagic zone
General Chemistry
Zinc
Oceanography
chemistry.chemical_compound
Speciation
chemistry
Chlorophyll
Environmental chemistry
Phytoplankton
Cathodic stripping voltammetry
Environmental Chemistry
Surface water
Geology
Water Science and Technology
media_common
Subjects
Details
- ISSN :
- 03044203
- Volume :
- 173
- Database :
- OpenAIRE
- Journal :
- Marine Chemistry
- Accession number :
- edsair.doi...........3bbdd7f3af2116c6f3391b48e4656407
- Full Text :
- https://doi.org/10.1016/j.marchem.2014.10.016