Toxicological characterization of Trinity River sediments.

dc.acquisition-srcen_US
dc.call-noQE571.H3 1989 GBAY.en_US
dc.contract-noen_US
dc.contributor.authorHall, J.F.en_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T17:06:30Z
dc.date.available2010-02-15T17:06:30Z
dc.date.issued1989en_US
dc.degreeen_US
dc.description225 p., Dissertationen_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 characterized 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 suspended 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 volatile organic contaminants to observed toxicity.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeTrinity Riveren_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/21890
dc.latitudeen_US
dc.locationGBIC Collectionen_US
dc.longitudeen_US
dc.notesen_US
dc.placeDenton, Texasen_US
dc.publisherUniversity of North Texas.en_US
dc.relation.ispartofseries4082.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjecttoxicity testsen_US
dc.subjecttoxic effectsen_US
dc.subjecttoxicityen_US
dc.subjectsedimentsen_US
dc.subjectsediment analysisen_US
dc.subjectbioassaysen_US
dc.subjectChironomus tentansen_US
dc.subjectorganic compoundsen_US
dc.subjectvolatile compoundsen_US
dc.titleToxicological characterization of Trinity River sediments.en_US
dc.typeBooken_US
dc.universityen_US
dc.vol-issueen_US

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