Toxicological characterization of Trinity River sediments

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dc.acquisition-srcDownloaded from-Aquatic Sciences and Fisheries Abstractsen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorHall JFen_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T17:13:29Z
dc.date.available2010-02-15T17:13:29Z
dc.date.issued1990en_US
dc.degreeen_US
dc.description-en_US
dc.description-otheren_US
dc.description.abstractSediments in the Trinity River were chemically, physically and biologically characterized and assessed for toxicity. Laboratory bioassays were conducted to identify sediments which induced toxic responses in test organisms and to document these responses through time. Metal and organic contaminant concentrations in bottom sediments were measured. Relationships between these concentrations and biological responses observed in laboratory bioassays were determined. Toxicity identification/reduction methods were used to characterize sediment toxicants. Sediment oxygen demand was also measured in resuspended and undisturbed bottom sediments through time. The Background Sediment Chemistry Approach and the Sediment Bioassay Approach were used to assess sediment quality. Sediment toxicity was observed in whole sediment bioassays using Chironomus tentans as the test species. A relationship between sediment contaminant concentration and toxicity was observed in approximately sixty percent of the sediments. Oxygen demand of resuspended sediments was elevated in sediments at two locations on the river. Oxygen demand of undisturbed sediments was elevated at one location on the river. Characterization of sediment toxicants was conducted using EDTA, pH, and carbon treatments and manipulations of the sediments. Aeration tests were also used to evaluate the contribution of volatile organic contaminants to observed toxicity (DBO)en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/22941
dc.latitudeen_US
dc.locationen_US
dc.longitudeen_US
dc.notesEnglishEnglishBook Monograph; DissertationFreshwaterNO9701624en_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries50411.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectaerationen_US
dc.subjectbioassaysen_US
dc.subjectbiochemical oxygen demanden_US
dc.subjectbottom sedimentsen_US
dc.subjectChironomidaeen_US
dc.subjectChironomus tentansen_US
dc.subjectcontaminantsen_US
dc.subjectOxygenen_US
dc.subjectoxygen demanden_US
dc.subjectQ5 01503 Characteristics,behavior and fateen_US
dc.subjectresuspended sedimentsen_US
dc.subjectSedimenten_US
dc.subjectsediment chemistryen_US
dc.subjectSediment pollutionen_US
dc.subjectSedimentsen_US
dc.subjectToxicantsen_US
dc.subjectToxicityen_US
dc.subjecttoxicity testsen_US
dc.subjectToxicologyen_US
dc.subjectUSA,Texas,Trinity R.en_US
dc.titleToxicological characterization of Trinity River sedimentsen_US
dc.typeTHESen_US
dc.universityen_US
dc.vol-issue()en_US

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GBIC Abstracts (full text not available through Jack K. Williams Library)