Hazardous concentrations of pollutants for micro-organisms in river sediment

2.50
Hdl Handle:
http://hdl.handle.net/10029/257032
Title:
Hazardous concentrations of pollutants for micro-organisms in river sediment
Authors:
van Beelen P; van Vlaardingen PLA
Other Titles:
Risico concentraties van verontreinigingen voor micro-organismen in rivier sediment
Abstract:
The toxic effects of 5 toxicants on 5 anaerobic microbial processes in fresh water sediments were measured. Four 14-C labelled substrates were mineralized to 14-CO2 at concentrations from 1-4 mug/l in fresh sediment microcosms. The half-lives of the substrates acetate, benzoate and 4-monochlorophenol were 12-30, 24, and 84 min. respectively. The chloroform mineralization was much slower with a half-life of 4.5 - 12 days. The natural methane production in the sediment was also used to measure the toxic effects. A dangerous Concentration 5% (DC5) can be calculated from the toxicity data using methods previously adapted for single animal species toxicity tests. Above this toxicant concentration more than 5% of the possible mineralization reactions can be partly inhibited. The HC5 concentrations for benzene, pentachlorophenol, 1,2-dichloroethane, chloroform and zinc are 1, 0.39, 0.0004, 0.0001 and 270 mg/kg sediment dry weight respectively. The chlorinated alkanes are much more toxic for anaerobic micro-organisms than for aerobic fish.<br>
Publisher:
Rijksinstituut voor Volksgezondheid en Milieu RIVM
Issue Date:
31-Mar-1992
Additional Links:
http://www.rivm.nl/bibliotheek/rapporten/714206004.html
Type:
Onderzoeksrapport
Language:
en
Sponsors:
DGM/HDM-DWL /Kroes HW
Appears in Collections:
RIVM official reports

Full metadata record

DC FieldValue Language
dc.contributor.authorvan Beelen P-
dc.contributor.authorvan Vlaardingen PLA-
dc.date.accessioned2017-02-20T06:50:59-
dc.date.issued1992-03-31-
dc.identifier714206004-
dc.description.abstractThe toxic effects of 5 toxicants on 5 anaerobic microbial processes in fresh water sediments were measured. Four 14-C labelled substrates were mineralized to 14-CO2 at concentrations from 1-4 mug/l in fresh sediment microcosms. The half-lives of the substrates acetate, benzoate and 4-monochlorophenol were 12-30, 24, and 84 min. respectively. The chloroform mineralization was much slower with a half-life of 4.5 - 12 days. The natural methane production in the sediment was also used to measure the toxic effects. A dangerous Concentration 5% (DC5) can be calculated from the toxicity data using methods previously adapted for single animal species toxicity tests. Above this toxicant concentration more than 5% of the possible mineralization reactions can be partly inhibited. The HC5 concentrations for benzene, pentachlorophenol, 1,2-dichloroethane, chloroform and zinc are 1, 0.39, 0.0004, 0.0001 and 270 mg/kg sediment dry weight respectively. The chlorinated alkanes are much more toxic for anaerobic micro-organisms than for aerobic fish.<br>en
dc.description.sponsorshipDGM/HDM-DWL /Kroes HW-
dc.format.extent13 p-
dc.language.isoen-
dc.publisherRijksinstituut voor Volksgezondheid en Milieu RIVM-
dc.relation.ispartofRIVM Rapport 714206004-
dc.relation.urlhttp://www.rivm.nl/bibliotheek/rapporten/714206004.html-
dc.subject07nl
dc.subject92-1nl
dc.subjectecotoxicologienl
dc.subjectmicro-organismennl
dc.subjectbiodegradatie; ecotoxicologynl
dc.subjectsedimentnl
dc.subjectmicro-organismsnl
dc.subjectbiodegradationnl
dc.titleHazardous concentrations of pollutants for micro-organisms in river sedimenten
dc.title.alternativeRisico concentraties van verontreinigingen voor micro-organismen in rivier sedimentnl
dc.typeOnderzoeksrapport-
dc.date.updated2017-02-20T05:50:59Z-
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