Major Aspects of the Mercury Cycle in the Negro River Basin, Amazon

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorda Silva, Gilmar Silverio
dc.creatorBisinoti, Marcia Cristina
dc.creatorFadini, Pedro Sergio
dc.creatorMagarelli, Gabriela
dc.creatorJardim, Wilson F.
dc.creatorFostier, Anne Helene
dc.date2014-05-20T14:03:11Z
dc.date2016-10-25T17:09:32Z
dc.date2014-05-20T14:03:11Z
dc.date2016-10-25T17:09:32Z
dc.date2009-01-01
dc.date.accessioned2017-04-05T21:29:21Z
dc.date.available2017-04-05T21:29:21Z
dc.identifierJournal of The Brazilian Chemical Society. São Paulo: Soc Brasileira Quimica, v. 20, n. 6, p. 1127-1134, 2009.
dc.identifier0103-5053
dc.identifierhttp://hdl.handle.net/11449/22265
dc.identifierhttp://acervodigital.unesp.br/handle/11449/22265
dc.identifier10.1590/S0103-50532009000600019
dc.identifierS0103-50532009000600019
dc.identifierWOS:000268336800019
dc.identifierhttp://dx.doi.org/10.1590/S0103-50532009000600019
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/867692
dc.descriptionDespite the low level of industrial activity and human density, Hg concentration in the Negro River basin is relatively high. Soil enriched with naturally high Hg concentrations and atmospheric deposition are the main sources of the metal in this watershed. Differences between invasive and evasive fluxes at the water/air and soil/air interfaces indicate Hg accumulation in the basin at a rate of 39.9 t y(-1). The type of soil, which is the main source of mercury for the water bodies, the hydrological cycle with floods and dry periods, act markedly on the water redox chemistry. A complex interaction between many seasonable variables such as solar intensity, water pH, age of the naturally occurring organic matter and the hydrological cycle alter the redox characteristics of these black water bodies, thus markedly affecting the consumption of Hg-0 and the degradation of methylmercury present in the water. Although methylation is favored in black waters, photodegradation counterpoints this formation, thus regulating the methylmercury burden in the water column.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.languageeng
dc.publisherSoc Brasileira Quimica
dc.relationJournal of the Brazilian Chemical Society
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectNegro River
dc.subjectmercury fluxes
dc.subjectmercury species
dc.subjectblack waters
dc.titleMajor Aspects of the Mercury Cycle in the Negro River Basin, Amazon
dc.typeOtro


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