NDLI: Sulfur speciation monitored <i>in situ</i> with solid state gold amalgam voltammetric microelectrodes: polysulfides as a special case in sediments, microbial mats and hydrothermal vent waters

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Sulfur speciation monitored in situ with solid state gold amalgam voltammetric microelectrodes: polysulfides as a special case in sediments, microbial mats and hydrothermal vent waters

Content Provider	Royal Society of Chemistry (RSC)
Author	Hohmann, Laura Popp, Jeannette I. Luther, George W. Glazer, Brian T. Nuzzio, Donald B. Rozan, Timothy F. Taillefert, Martial Brendel, Paul J. Theberge, Stephen M.
Copyright Year	2001
Abstract	Sulfur speciation was determined in real time in salt marsh microbial mats, subtidal sediments and hydrothermal vent diffuse flow waters using solid state gold-amalgam voltammetric microelectrodes. Chemical species were measured in situ without any sample manipulation or processing. The partially oxidized sulfur species detected were polysulfides, thiosulfate, elemental sulfur and tetrathionate. Fe(III) oxidation of hydrogen sulfide does not occur within the mats where microbially mediated processes are responsible for oxidation of H2S. In sediments and diffuse flow vent waters, Fe(III) phases are the direct oxidant of H2S. Sulfur speciation determined in this work is due to in situ biogeochemical processes and is not due to artefacts of sample manipulation. The voltammetric data show that polysulfides are the first detectable intermediate during sulfide oxidation which is consistent with previous laboratory studies.
Starting Page	61
Ending Page	66
Page Count	6
File Format	HTM / HTML PDF
ISSN	14640325
Volume Number	3
Issue Number	1
Journal	Journal of Environmental Monitoring
DOI	10.1039/b006499h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Speciation Salt marsh Hydrothermal vent Chemical species Sulfur Thiosulfate Tetrathionate Hydrogen sulfide Biogeochemistry Sulfide
Content Type	Text
Resource Type	Article
Subject	Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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