Cited by 467Marine and coastal ecosystemsPlant Micronutrient Interactions and EffectsGeochemistry and Elemental Analysis

Complexation of zinc by natural organic ligands in the central North Pacific

Bruland, Kenneth W.·1989·Limnology and Oceanography

Abstract

The complexation of zinc by natural organic ligands in the upper 600 m of the central North Pacific was determined with differential pulse anodic stripping voltammetry at a thin mercury film, rotating glassy‐carbon disk electrode. Of the dissolved zinc in surface waters >98% was bound in strong complexes (log K′cond, Zn2+ = 11.0) by relatively zinc‐specific organic ligands existing at low concentrations (1.2 nM). Although the vertical distribution of this ligand class is relatively uniform, total dissolved zinc varies from concentrations close to 0.1 nM in surface waters of the central North Pacific to 3 nM at 500 m. Complexation of dissolved zinc by this class of organic ligands causes the concentration of inorganic zinc to vary from 2 pM in surface waters to 2 nM at 500 m, a 1,000‐fold variation. The free zinc ion activity, expressed as pZn, is calculated to be of the order of 12.7 in the surface waters of the central North Pacific. This low free zinc ion activity may influence distributions of oceanic and neritic phytoplankton species.

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Crossref · 10.4319/lo.1989.34.2.0269

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Authors
Bruland, K. W.
Affiliations
University of California, Santa Cruz (US)
Corresponding author
Bruland, Kenneth W.
Venue
Limnology and Oceanography
Publisher
Wiley
Published
1989-03
Volume
34
Issue
2
Pages
269-285
ISSN
  • 0024-3590 (ISSN-L)
  • 1939-5590
OpenAlex
W2096213066
Cited by
467
References
45
Citations by year
2026: 3 · 2025: 9 · 2024: 10 · 2023: 4 · 2022: 16 · 2021: 16 · 2020: 16 · 2019: 13 · 2018: 14 · 2017: 18 · 2016: 17 · 2015: 14 · 2014: 15 · 2013: 22 · 2012: 19
FWCI
10.69
Type
journal article
Language
en
Open access
closed
Locations
Limnology and Oceanography (publishedVersion)
Funders
Office of Naval Research
Topics
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Micronutrient Interactions and Effects
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
Keywords
zinc complexation, natural organic ligands, dissolved zinc, central North Pacific, zinc speciation, vertical distribution, phytoplankton, trace metal bioavailability

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