Factors affecting Hg (II) adsorption in soils from the Rio Negro basin (Amazon)

dc.creatorMiretzky, Patricia
dc.creatorBisinoti, Márcia Cristina
dc.creatorJardim, Wilson F.
dc.creatorRocha, Júlio César
dc.date2005-06-01
dc.date2014-07-17T14:51:54Z
dc.date2015-11-25T19:19:58Z
dc.date2014-07-17T14:51:54Z
dc.date2015-11-25T19:19:58Z
dc.date.accessioned2018-03-28T20:37:00Z
dc.date.available2018-03-28T20:37:00Z
dc.identifierQuímica Nova. Sociedade Brasileira de Química, v. 28, n. 3, p. 438-443, 2005.
dc.identifier0100-4042
dc.identifierS0100-40422005000300014
dc.identifier10.1590/S0100-40422005000300014
dc.identifierhttp://dx.doi.org/10.1590/S0100-40422005000300014
dc.identifierhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422005000300014
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/23649
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/23649
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1232735
dc.descriptionMercury (II) adsorption studies in top soils (top 10 cm) from the Rio Negro basin show this process depends strongly on some selected parameters of the aqueous phase in contact with the soils. Maximum adsorption occurred in the pH range 3.0-5.0 (>90%). Dissolved organic matter shows an inhibitory effect on the availability of Hg (II) to be adsorbed by the soils, whereas a higher chloride content of the solution resulted in a lower adsorption of Hg (II) at pH 5.0. Soils with higher organic matter content were less affected by changes in the salinity. An increase in the initial Hg (II) concentration increased the amount of Hg (II) adsorbed by the soil and decreased the time needed to reach equilibrium. A Freundlich isotherm provided a good model for Hg (II) adsorption in the two types of soil studied. The kinetics of Hg (II) adsorption on Amazonian soils showed to be very fast and followed pseudo-second order kinetics. An environmental implication of these results is discussed under the real scenario present in the Negro River basin, where acidic waters are in contact with a soil naturally rich in mercury.
dc.description438
dc.description443
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.languageen
dc.publisherSociedade Brasileira de Química
dc.relationQuímica Nova
dc.rightsaberto
dc.sourceSciELO
dc.subjectmercury
dc.subjectsoils
dc.subjectFreundlich isotherm
dc.titleFactors affecting Hg (II) adsorption in soils from the Rio Negro basin (Amazon)
dc.typeArtículos de revistas


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