A H2S microsensor for profiling biofilms and sediments: Application in an acidic lake sediment

DSpace/Manakin Repository

Search OPUS


Advanced Search

Browse

My Account

Show simple item record

dc.contributor.author Kühl, M
dc.contributor.author Steuckart, C
dc.contributor.author Eickert, G
dc.contributor.author Jeroschewski, P
dc.date.accessioned 2011-02-07T06:20:41Z
dc.date.issued 1998
dc.identifier.citation Aquatic Microbial Ecology, 1998, 15 (2), pp. 201 - 209
dc.identifier.issn 0948-3055
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/13317
dc.description.abstract We developed a microsensor for the amperometric detection of dissolved hydrogen sulfide, H2S, in sediments and biofilms. The microsensor exhibits a fast (t90 <0.2 to 0.5 s) and linear response to H2S over a concentration range of 1 to >1000 μmol H2S l-1, and has a low stirring dependency of the microsensor signal (<1 to 2%). We used the new microsensor to obtain the first microprofiles of H2S in an acidic lake sediment with a several cm thick flocculant surface layer. Despite the low pH of 4.6, a relative low SO42- level in the lake water, and a broad O2 respiration zone of ca 6 mm, we were able to measure H2S depth profiles in the sediment at a good resolution, that allowed for calculation of specific sulfate reduction and H2S oxidation activities. Such calculations showed highest sulfate reduction activity in the anoxic sediment down to ca 20 mm depth. A comparison of calculated areal rates of O2 consumption and sulfate reduction indicated that sulfate reduction accounted for up to 13% of total organic carbon mineralization in the acidic sediment. All produced H2S was reoxidizecl aerobically with O2 at the oxic-anoxic interface. In addition to its good performance in acidic environments, the new H2S microsensor has proven useful for sulfide measurements in neutral and moderate alkaline (pH < 9) biofilms and sediments, and thus is a true alternative to the traditionally used potentiometric Ag/Ag2S microelectrode for most applications in aquatic ecology and biogeochemistry.
dc.language eng
dc.subject Acidic sediment, Freshwater, Hydrogen sulfide, Microsensor, Sulfate reduction, Sulfide oxidation, microsensor, hydrogen sulfide, acidic sediment, sulfate reduction, sulfide oxidation, freshwater, Microsensor. Hydrogen sulfide - Acidic sediment - Sulfate reduction - Sulfide oxidation . Freshwater, Marine Biology & Hydrobiology
dc.subject Acidic sediment; Freshwater; Hydrogen sulfide; Microsensor; Sulfate reduction; Sulfide oxidation; microsensor; hydrogen sulfide; acidic sediment; sulfate reduction; sulfide oxidation; freshwater; Microsensor. Hydrogen sulfide - Acidic sediment - Sulfate reduction - Sulfide oxidation . Freshwater; Marine Biology & Hydrobiology
dc.title A H2S microsensor for profiling biofilms and sediments: Application in an acidic lake sediment
dc.type Journal Article
dc.description.version Published
dc.description.version Published
dc.description.version Published
dc.parent Aquatic Microbial Ecology
dc.journal.volume 2
dc.journal.volume 15
dc.journal.number en_US
dc.publocation Oldendorf, Germany en_US
dc.identifier.startpage 201 en_US
dc.identifier.endpage 209 en_US
dc.cauo.name SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 0602 Ecology
dc.personcode 107129 en_US
dc.personcode 0000062490 en_US
dc.personcode 0000062543 en_US
dc.personcode 0000062489 en_US
dc.percentage 100 en_US
dc.classification.name Ecology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords Microsensor. Hydrogen sulfide - Acidic sediment - Sulfate reduction - Sulfide oxidation . Freshwater en_US
dc.description.keywords Sulphur-polypyrrole composite
dc.description.keywords Lithium rechargeable battery
dc.description.keywords Polypyrrole additive
dc.description.keywords microsensor
dc.description.keywords microsensor
dc.description.keywords hydrogen sulfide
dc.description.keywords hydrogen sulfide
dc.description.keywords acidic sediment
dc.description.keywords acidic sediment
dc.description.keywords sulfate reduction
dc.description.keywords sulfate reduction
dc.description.keywords sulfide oxidation
dc.description.keywords sulfide oxidation
dc.description.keywords freshwater
dc.description.keywords freshwater
dc.description.keywords microsensor
dc.description.keywords hydrogen sulfide
dc.description.keywords acidic sediment
dc.description.keywords sulfate reduction
dc.description.keywords sulfide oxidation
dc.description.keywords freshwater
dc.description.keywords Acidic sediment
dc.description.keywords Freshwater
dc.description.keywords Hydrogen sulfide
dc.description.keywords Microsensor
dc.description.keywords Sulfate reduction
dc.description.keywords Sulfide oxidation
dc.staffid en_US
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - C3


Files in this item

This item appears in the following Collection(s)

Show simple item record