Role of sulfide oxidation intermediates in the redox balance of the oxic–Anoxic interface of the gotland deep, baltic sea

A. Kamyshny*, E. V. Yakushev, G. Jost, O. I. Podymov

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

16 Scopus citations

Abstract

Depth profiles of sulfur species, including sulfide oxidation intermediates (zero-valent sulfur and thiosulfate), nutrients, metals (Mn, Fe), oxygen, temperature, salinity, and turbidity, were measured in the Gotland Deep, at the eastern Gotland Basin, in July 2007. We found that the highest concentrations of more oxidized sulfide oxidation intermediate, thiosulfate, were located below the highest concentrations of zero-valent sulfur. We explain this paradox by bacterial nitrate reduction coupled with thiosulfate oxidation. The same process using zero-valent sulfur is less effective due to particulate form of the latter. Oxic water intrusions were traced in both the redox transition zone (RTZ) and deep water column by decrease in concentrations of reduced nitrogen and sulfur species (sulfide, zero-valent sulfur, and thiosulfate) as well as by increase in nitrate concentration. Two turbidity maxima were found in the RTZ. Turbidity maximum, which coincides with past oxic water intrusion, was found in the deep sulfide-rich water layer. Profiles of metals and nutrients in most of the profiles indicate as well unstability of the redoxcline and oxic water intrusions at and below the redoxcline.

Original languageAmerican English
Title of host publicationHandbook of Environmental Chemistry
PublisherSpringer Verlag
Pages95-119
Number of pages25
DOIs
StatePublished - 2013
Externally publishedYes

Publication series

NameHandbook of Environmental Chemistry
Volume22
ISSN (Print)1867-979X

Bibliographical note

Publisher Copyright:
© Springer-Verlag Berlin Heidelberg 2010.

Keywords

  • Baltic sea
  • Gotland deep
  • Hydrogen sulfide
  • Stratified basin
  • Sulfide oxidation
  • Thiosulfate
  • Zero-valent sulfur

Fingerprint

Dive into the research topics of 'Role of sulfide oxidation intermediates in the redox balance of the oxic–Anoxic interface of the gotland deep, baltic sea'. Together they form a unique fingerprint.

Cite this