Application of toxicity identification evaluation to sediment in a highly contaminated water reservoir in southeastern Brazil

dc.creatorAraujo, RPA
dc.creatorBotta-Paschoal, CMR
dc.creatorSilverio, PF
dc.creatorAlmeida, FV
dc.creatorRodrigues, PE
dc.creatorUmbuzeiro, GA
dc.creatorJardim, WF
dc.creatorMozeto, AA
dc.date2006
dc.dateFEB
dc.date2014-11-16T04:39:03Z
dc.date2015-11-26T17:23:18Z
dc.date2014-11-16T04:39:03Z
dc.date2015-11-26T17:23:18Z
dc.date.accessioned2018-03-29T00:10:39Z
dc.date.available2018-03-29T00:10:39Z
dc.identifierEnvironmental Toxicology And Chemistry. Setac, v. 25, n. 2, n. 581, n. 588, 2006.
dc.identifier0730-7268
dc.identifierWOS:000234792000034
dc.identifier10.1897/05-144R.1
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/54795
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/54795
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/54795
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1283800
dc.descriptionRasgao Reservoir, located close to the Metropolitan region of Sao Paulo, Brazil, has been analyzed previously, and its sediment was found to be highly toxic, with high levels of metals and polycyclic aromatic hydrocarbons and a complete absence of benthic life. Polychlorinated biphenyls also were present, as was mutagenic activity, detected with the Salmonella/microsome assay. Because of the extremely complex mixture of contaminants in these sediments, a toxicity identification evaluation was performed on the pore water and elutriate using Ceriodaphnia dubia and Vibrio fischeri. Toxicity characterization, identification, and confirmation procedures were performed in one representative sample of the reservoir, and the results indicated that ammonia was the main cause of the toxicity detected with C. dubia in both sediment pore water and elutriate. Chemical analysis corroborated this observation by revealing un-ionized ammonia concentrations as high as 5.14 mg/L in pore water and 2.06 mg/L in elutriate. These high ammonia levels masked possible toxicity caused by other classes of compounds. The toxicity detected with V. fischeri decreased with the time of sample storage and was related to the organic fraction of the pore water and the elutriate, in which compounds such as benzothiazole and nonylphenol were detected.
dc.description25
dc.description2
dc.description581
dc.description588
dc.languageen
dc.publisherSetac
dc.publisherPensacola
dc.publisherEUA
dc.relationEnvironmental Toxicology And Chemistry
dc.relationEnviron. Toxicol. Chem.
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectsediment
dc.subjecttoxicity identification evaluation
dc.subjectCeriodaphnia dubia
dc.subjectVibrio fischeri
dc.subjectammonia
dc.subjectAcid-volatile Sulfide
dc.subjectCeriodaphnia-dubia
dc.subjectAmmonia
dc.subjectEffluent
dc.subjectToxicant
dc.subjectMetals
dc.titleApplication of toxicity identification evaluation to sediment in a highly contaminated water reservoir in southeastern Brazil
dc.typeArtículos de revistas


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