Seasonal behavior of mercury species in waters and sediments from the Negro River Basin, Amazon, Brazil

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorBisinoti, Márcia Cristina
dc.creatorSargentini Jr., Ézio
dc.creatorJardim, Wilson F.
dc.date2014-05-27T11:22:30Z
dc.date2016-10-25T18:23:58Z
dc.date2014-05-27T11:22:30Z
dc.date2016-10-25T18:23:58Z
dc.date2007-06-14
dc.date.accessioned2017-04-06T01:25:18Z
dc.date.available2017-04-06T01:25:18Z
dc.identifierJournal of the Brazilian Chemical Society, v. 18, n. 3, p. 544-553, 2007.
dc.identifier0103-5053
dc.identifier1678-4790
dc.identifierhttp://hdl.handle.net/11449/69718
dc.identifierhttp://acervodigital.unesp.br/handle/11449/69718
dc.identifier10.1590/S0103-50532007000300008
dc.identifierS0103-50532007000300008
dc.identifierWOS:000247722300007
dc.identifier2-s2.0-34250027603.pdf
dc.identifier2-s2.0-34250027603
dc.identifierhttp://dx.doi.org/10.1590/S0103-50532007000300008
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/890924
dc.descriptionTotal (HgT), reactive (HgR) and organic (Hg ORG) mercury species have been quantified in non-filtered waters collected from the Negro River Basin, Amazon (from January/2002 through January/2004), in both black and white water bodies. Black waters presented the highest HgT, HgORG and HgR concentration (29.1 ng L-1, 1.63 ng L-1 and 3.9 ng L-1, respectively), while, white waters presented the lowest HgT, Hg ORG and HgR concentration (8.8 ng L-1, 0.49 ng L-1 and 1.2 ng L-1, respectively). An inverse correlation between HgT and the water level over the basin was obtained, although the HgORG concentration has increased in the first rainy months and then decreased as the water level rose. Total mercury in surface sediments (0-10 cm) ranged from 70 to 271 mg kg-1 being the methylmercury 0.47-1.79 % of this stock. The results indicate that HgR and the labile dissolved organic matter were introduced into the aquatic environment during the flooding season, especially in the earlier stages, thus contributing to mercury methylation. ©2007 Sociedade Brasileira de Química.
dc.languageeng
dc.relationJournal of the Brazilian Chemical Society
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectBlack and white waters
dc.subjectMercury speciation
dc.subjectNegro River Basin
dc.subjectOrganic mercury
dc.titleSeasonal behavior of mercury species in waters and sediments from the Negro River Basin, Amazon, Brazil
dc.typeOtro


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