Factors affecting Hg (II) adsorption in soils from the Rio Negro basin (Amazon)
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S0100-40422005000300014 http://hdl.handle.net/11449/27590 |
Resumo: | Mercury (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. |
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Factors affecting Hg (II) adsorption in soils from the Rio Negro basin (Amazon)mercurysoilsFreundlich isothermMercury (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.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidad de Buenos Aires Facultad de Ciencias Veterinarias Centro de Estudios Transdiciplinarios del ÁguaUniversidade Estadual de Campinas Instituto de QuímicaUniversidade Estadual Paulista Instituto de QuímicaUniversidade Estadual Paulista Instituto de QuímicaSociedade Brasileira de QuímicaUniversidad de Buenos Aires Facultad de Ciencias Veterinarias Centro de Estudios Transdiciplinarios del ÁguaUniversidade Estadual de Campinas (UNICAMP)Universidade Estadual Paulista (Unesp)Miretzky, PatriciaBisinoti, Márcia CristinaJardim, Wilson F.Rocha, Julio Cesar [UNESP]2014-05-20T15:10:20Z2014-05-20T15:10:20Z2005-06-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article438-443application/pdfhttp://dx.doi.org/10.1590/S0100-40422005000300014Química Nova. Sociedade Brasileira de Química, v. 28, n. 3, p. 438-443, 2005.0100-4042http://hdl.handle.net/11449/2759010.1590/S0100-40422005000300014S0100-40422005000300014S0100-40422005000300014.pdf41488374036182073264480044529380SciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengQuímica Nova0.6460,255info:eu-repo/semantics/openAccess2023-12-03T06:17:18Zoai:repositorio.unesp.br:11449/27590Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:24:59.971265Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Factors affecting Hg (II) adsorption in soils from the Rio Negro basin (Amazon) |
title |
Factors affecting Hg (II) adsorption in soils from the Rio Negro basin (Amazon) |
spellingShingle |
Factors affecting Hg (II) adsorption in soils from the Rio Negro basin (Amazon) Miretzky, Patricia mercury soils Freundlich isotherm |
title_short |
Factors affecting Hg (II) adsorption in soils from the Rio Negro basin (Amazon) |
title_full |
Factors affecting Hg (II) adsorption in soils from the Rio Negro basin (Amazon) |
title_fullStr |
Factors affecting Hg (II) adsorption in soils from the Rio Negro basin (Amazon) |
title_full_unstemmed |
Factors affecting Hg (II) adsorption in soils from the Rio Negro basin (Amazon) |
title_sort |
Factors affecting Hg (II) adsorption in soils from the Rio Negro basin (Amazon) |
author |
Miretzky, Patricia |
author_facet |
Miretzky, Patricia Bisinoti, Márcia Cristina Jardim, Wilson F. Rocha, Julio Cesar [UNESP] |
author_role |
author |
author2 |
Bisinoti, Márcia Cristina Jardim, Wilson F. Rocha, Julio Cesar [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidad de Buenos Aires Facultad de Ciencias Veterinarias Centro de Estudios Transdiciplinarios del Água Universidade Estadual de Campinas (UNICAMP) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Miretzky, Patricia Bisinoti, Márcia Cristina Jardim, Wilson F. Rocha, Julio Cesar [UNESP] |
dc.subject.por.fl_str_mv |
mercury soils Freundlich isotherm |
topic |
mercury soils Freundlich isotherm |
description |
Mercury (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. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-06-01 2014-05-20T15:10:20Z 2014-05-20T15:10:20Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S0100-40422005000300014 Química Nova. Sociedade Brasileira de Química, v. 28, n. 3, p. 438-443, 2005. 0100-4042 http://hdl.handle.net/11449/27590 10.1590/S0100-40422005000300014 S0100-40422005000300014 S0100-40422005000300014.pdf 4148837403618207 3264480044529380 |
url |
http://dx.doi.org/10.1590/S0100-40422005000300014 http://hdl.handle.net/11449/27590 |
identifier_str_mv |
Química Nova. Sociedade Brasileira de Química, v. 28, n. 3, p. 438-443, 2005. 0100-4042 10.1590/S0100-40422005000300014 S0100-40422005000300014 S0100-40422005000300014.pdf 4148837403618207 3264480044529380 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Química Nova 0.646 0,255 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
438-443 application/pdf |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
SciELO reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129065008234496 |