Mercury in the Waters of the Jundiai River, SP, Brazil: The Role of Dissolved Organic Matter

dc.creatorFagnani, E
dc.creatorGuimaraes, JR
dc.creatorFadini, PS
dc.date2012
dc.dateSEP
dc.date2014-07-30T13:41:02Z
dc.date2015-11-26T16:42:09Z
dc.date2014-07-30T13:41:02Z
dc.date2015-11-26T16:42:09Z
dc.date.accessioned2018-03-28T23:26:35Z
dc.date.available2018-03-28T23:26:35Z
dc.identifierAquatic Geochemistry. Springer, v. 18, n. 5, n. 445, n. 456, 2012.
dc.identifier1380-6165
dc.identifier1573-1421
dc.identifierWOS:000308639900006
dc.identifier10.1007/s10498-012-9169-0
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/53607
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/53607
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1273167
dc.descriptionMany developing countries have regions of high demographic density, where untreated residuary waters from different sources are often discharged into rivers, streams and other water bodies. This paper discusses the reducing action of organic matter of anthropic origin on the mercury redox cycle in the Jundiai River impacted by discharged wastes, and on the Pirai River, a non-impacted water body. The total mercury concentrations in these locations vary from 1.7 to 32 ng L-1 in the former and from 0.6 to 10.6 ng L-1 in the latter. Dissolved organic carbon concentrations of up to 68.3 and 6.5 mg L-1 were observed, confirming the higher impact on the Jundiai River. It was found that an inverse correlation between the concentration of dissolved organic carbon and total mercury was stronger in the Jundiai River, given that it receives higher organic loads, suggesting that organic matter exerts a reducing action on mercury, which is released as gas into the atmosphere. This correlation was not observed in the Pirai River, where the organic matter of natural origin is probably not sufficiently labile to act intensely upon the Hg redox cycle, favoring the metal transport.
dc.description18
dc.description5
dc.description445
dc.description456
dc.languageen
dc.publisherSpringer
dc.publisherNew York
dc.publisherEUA
dc.relationAquatic Geochemistry
dc.relationAquat. Geochem.
dc.rightsfechado
dc.rightshttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dc.sourceWeb of Science
dc.subjectMercury redox cycle
dc.subjectJundiai River
dc.subjectAquatic Humic Substances
dc.subjectPhotoinduced Oxidation
dc.subjectFresh-water
dc.subjectSediments
dc.subjectLakes
dc.subjectBioavailability
dc.subjectComplexation
dc.subjectSpeciation
dc.subjectAmazon
dc.subjectHg(ii)
dc.titleMercury in the Waters of the Jundiai River, SP, Brazil: The Role of Dissolved Organic Matter
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución