Solubility of heavy metals/metalloid on multi-metal contaminated soil samples from a gold ore processing area : effects of humic substances

Detalhes bibliográficos
Autor(a) principal: Boechat, Cácio Luiz
Data de Publicação: 2016
Outros Autores: Pistóia, Vítor Caçula, Ludtke, Ana Cristina, Gianello, Clesio, Camargo, Flavio Anastacio de Oliveira
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/186053
Resumo: Bioavailability of heavy metals at contaminated sites is largely controlled by the physicochemical properties of the environmental media such as dissolved organic matter, hydroxides and clay colloids, pH, soil cation exchange capacity and oxidation-reduction potential. The aim of this study was to investigate soil pH and heavy metal solubility effect by levels of humic and fulvic acids applied in soil samples with different levels of contamination by heavy metals. The soil samples used in this study were collected in a known metal-contaminated site. Humic acid (HA) and fulvic acid (FA) were purchased as a commercially available liquid material extracted from Leonardite. The experiment was carried out in a factorial scheme of 4 × (4 + 1), with four contaminated soil samples and four treatments, comprised of two levels of HA, two levels of FA and a control. The HA treatments increased the solubility of Cu, Zn, Ni, Cr, Cd, Pb, As and Ba from soils, while FA treatments decreased, thus raising or not their availability and mobility in soil. Humic acid concentration did not influence soil pH and FA decreased soil pH until 0.7 units. The initial heavy metal concentration in soil affects the magnitude of the processes involving humic substances. The lower releases of heavy metals by FA verified the importance of the complexation properties of organic compounds. These results appear to encourage the use of HA for increased plant-availability of heavy metals in remediation projects and the use of FA for decreased plant-availability of heavy metals at contaminated sites with a risk of introducing metals into the food chain.
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spelling Boechat, Cácio LuizPistóia, Vítor CaçulaLudtke, Ana CristinaGianello, ClesioCamargo, Flavio Anastacio de Oliveira2018-12-07T02:51:05Z20160100-0683http://hdl.handle.net/10183/186053001079808Bioavailability of heavy metals at contaminated sites is largely controlled by the physicochemical properties of the environmental media such as dissolved organic matter, hydroxides and clay colloids, pH, soil cation exchange capacity and oxidation-reduction potential. The aim of this study was to investigate soil pH and heavy metal solubility effect by levels of humic and fulvic acids applied in soil samples with different levels of contamination by heavy metals. The soil samples used in this study were collected in a known metal-contaminated site. Humic acid (HA) and fulvic acid (FA) were purchased as a commercially available liquid material extracted from Leonardite. The experiment was carried out in a factorial scheme of 4 × (4 + 1), with four contaminated soil samples and four treatments, comprised of two levels of HA, two levels of FA and a control. The HA treatments increased the solubility of Cu, Zn, Ni, Cr, Cd, Pb, As and Ba from soils, while FA treatments decreased, thus raising or not their availability and mobility in soil. Humic acid concentration did not influence soil pH and FA decreased soil pH until 0.7 units. The initial heavy metal concentration in soil affects the magnitude of the processes involving humic substances. The lower releases of heavy metals by FA verified the importance of the complexation properties of organic compounds. These results appear to encourage the use of HA for increased plant-availability of heavy metals in remediation projects and the use of FA for decreased plant-availability of heavy metals at contaminated sites with a risk of introducing metals into the food chain.application/pdfengRevista brasileira de ciencia do solo. Viçosa. Vol. 40 (jun. 2016), [art.] e0150383, 10 p.Analise do soloHumusMetal pesadoContaminaçãoLixiviaçãoSoil pHBioavailable metalHumic acidFulvic acidsMetal leachingSolubility of heavy metals/metalloid on multi-metal contaminated soil samples from a gold ore processing area : effects of humic substancesinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001079808.pdf.txt001079808.pdf.txtExtracted Texttext/plain35116http://www.lume.ufrgs.br/bitstream/10183/186053/2/001079808.pdf.txt4ccfc713da60a060205bb827d390d97cMD52ORIGINAL001079808.pdfTexto completo (inglês)application/pdf282748http://www.lume.ufrgs.br/bitstream/10183/186053/1/001079808.pdfc0f057fff562493ed123fcb4496b5a30MD5110183/1860532018-12-08 03:13:57.664764oai:www.lume.ufrgs.br:10183/186053Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-12-08T05:13:57Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Solubility of heavy metals/metalloid on multi-metal contaminated soil samples from a gold ore processing area : effects of humic substances
title Solubility of heavy metals/metalloid on multi-metal contaminated soil samples from a gold ore processing area : effects of humic substances
spellingShingle Solubility of heavy metals/metalloid on multi-metal contaminated soil samples from a gold ore processing area : effects of humic substances
Boechat, Cácio Luiz
Analise do solo
Humus
Metal pesado
Contaminação
Lixiviação
Soil pH
Bioavailable metal
Humic acid
Fulvic acids
Metal leaching
title_short Solubility of heavy metals/metalloid on multi-metal contaminated soil samples from a gold ore processing area : effects of humic substances
title_full Solubility of heavy metals/metalloid on multi-metal contaminated soil samples from a gold ore processing area : effects of humic substances
title_fullStr Solubility of heavy metals/metalloid on multi-metal contaminated soil samples from a gold ore processing area : effects of humic substances
title_full_unstemmed Solubility of heavy metals/metalloid on multi-metal contaminated soil samples from a gold ore processing area : effects of humic substances
title_sort Solubility of heavy metals/metalloid on multi-metal contaminated soil samples from a gold ore processing area : effects of humic substances
author Boechat, Cácio Luiz
author_facet Boechat, Cácio Luiz
Pistóia, Vítor Caçula
Ludtke, Ana Cristina
Gianello, Clesio
Camargo, Flavio Anastacio de Oliveira
author_role author
author2 Pistóia, Vítor Caçula
Ludtke, Ana Cristina
Gianello, Clesio
Camargo, Flavio Anastacio de Oliveira
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Boechat, Cácio Luiz
Pistóia, Vítor Caçula
Ludtke, Ana Cristina
Gianello, Clesio
Camargo, Flavio Anastacio de Oliveira
dc.subject.por.fl_str_mv Analise do solo
Humus
Metal pesado
Contaminação
Lixiviação
topic Analise do solo
Humus
Metal pesado
Contaminação
Lixiviação
Soil pH
Bioavailable metal
Humic acid
Fulvic acids
Metal leaching
dc.subject.eng.fl_str_mv Soil pH
Bioavailable metal
Humic acid
Fulvic acids
Metal leaching
description Bioavailability of heavy metals at contaminated sites is largely controlled by the physicochemical properties of the environmental media such as dissolved organic matter, hydroxides and clay colloids, pH, soil cation exchange capacity and oxidation-reduction potential. The aim of this study was to investigate soil pH and heavy metal solubility effect by levels of humic and fulvic acids applied in soil samples with different levels of contamination by heavy metals. The soil samples used in this study were collected in a known metal-contaminated site. Humic acid (HA) and fulvic acid (FA) were purchased as a commercially available liquid material extracted from Leonardite. The experiment was carried out in a factorial scheme of 4 × (4 + 1), with four contaminated soil samples and four treatments, comprised of two levels of HA, two levels of FA and a control. The HA treatments increased the solubility of Cu, Zn, Ni, Cr, Cd, Pb, As and Ba from soils, while FA treatments decreased, thus raising or not their availability and mobility in soil. Humic acid concentration did not influence soil pH and FA decreased soil pH until 0.7 units. The initial heavy metal concentration in soil affects the magnitude of the processes involving humic substances. The lower releases of heavy metals by FA verified the importance of the complexation properties of organic compounds. These results appear to encourage the use of HA for increased plant-availability of heavy metals in remediation projects and the use of FA for decreased plant-availability of heavy metals at contaminated sites with a risk of introducing metals into the food chain.
publishDate 2016
dc.date.issued.fl_str_mv 2016
dc.date.accessioned.fl_str_mv 2018-12-07T02:51:05Z
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dc.identifier.nrb.pt_BR.fl_str_mv 001079808
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dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Revista brasileira de ciencia do solo. Viçosa. Vol. 40 (jun. 2016), [art.] e0150383, 10 p.
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dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRGS
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reponame_str Repositório Institucional da UFRGS
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