Vermicompost as a natural adsorbent material: characterization and potentialities for cadmium adsorption

Detalhes bibliográficos
Autor(a) principal: Pereira,Madson G.
Data de Publicação: 2003
Outros Autores: Arruda,Marco A. Z.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532003000100007
Resumo: Vermicompost (humic material) samples were submitted to characterization by infrared spectroscopy, X-ray diffractometry, thermogravimetric analysis, electron microscopy etc. In addition, its cation exchange capacity (CEC) was determined. Factorial experiments were designed in order to elucidate the interaction mechanisms between Cd2+ and the adsorptive sites of vermicompost. The maximum adsorptive capacity for cadmium was evaluated by a Langmuir isotherm. The characterization revealed that vermicompost exhibits high CEC values (ca. 72.9 meq per 100 g), high surface area (porous material), chelating groups and a maximum adsorptive capacity for Cd (38.6 mg g-1) at pH 5.0. This potential application was exploited in the analysis of synthetic and real (mineral water) samples with Cd concentrations of ca 5 mug L-1, requiring a preconcentration step. An enrichment factor of 100 was attained.
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spelling Vermicompost as a natural adsorbent material: characterization and potentialities for cadmium adsorptionvermicompostcharacterizationcadmium adsorptionVermicompost (humic material) samples were submitted to characterization by infrared spectroscopy, X-ray diffractometry, thermogravimetric analysis, electron microscopy etc. In addition, its cation exchange capacity (CEC) was determined. Factorial experiments were designed in order to elucidate the interaction mechanisms between Cd2+ and the adsorptive sites of vermicompost. The maximum adsorptive capacity for cadmium was evaluated by a Langmuir isotherm. The characterization revealed that vermicompost exhibits high CEC values (ca. 72.9 meq per 100 g), high surface area (porous material), chelating groups and a maximum adsorptive capacity for Cd (38.6 mg g-1) at pH 5.0. This potential application was exploited in the analysis of synthetic and real (mineral water) samples with Cd concentrations of ca 5 mug L-1, requiring a preconcentration step. An enrichment factor of 100 was attained.Sociedade Brasileira de Química2003-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532003000100007Journal of the Brazilian Chemical Society v.14 n.1 2003reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532003000100007info:eu-repo/semantics/openAccessPereira,Madson G.Arruda,Marco A. Z.eng2003-04-07T00:00:00Zoai:scielo:S0103-50532003000100007Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2003-04-07T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Vermicompost as a natural adsorbent material: characterization and potentialities for cadmium adsorption
title Vermicompost as a natural adsorbent material: characterization and potentialities for cadmium adsorption
spellingShingle Vermicompost as a natural adsorbent material: characterization and potentialities for cadmium adsorption
Pereira,Madson G.
vermicompost
characterization
cadmium adsorption
title_short Vermicompost as a natural adsorbent material: characterization and potentialities for cadmium adsorption
title_full Vermicompost as a natural adsorbent material: characterization and potentialities for cadmium adsorption
title_fullStr Vermicompost as a natural adsorbent material: characterization and potentialities for cadmium adsorption
title_full_unstemmed Vermicompost as a natural adsorbent material: characterization and potentialities for cadmium adsorption
title_sort Vermicompost as a natural adsorbent material: characterization and potentialities for cadmium adsorption
author Pereira,Madson G.
author_facet Pereira,Madson G.
Arruda,Marco A. Z.
author_role author
author2 Arruda,Marco A. Z.
author2_role author
dc.contributor.author.fl_str_mv Pereira,Madson G.
Arruda,Marco A. Z.
dc.subject.por.fl_str_mv vermicompost
characterization
cadmium adsorption
topic vermicompost
characterization
cadmium adsorption
description Vermicompost (humic material) samples were submitted to characterization by infrared spectroscopy, X-ray diffractometry, thermogravimetric analysis, electron microscopy etc. In addition, its cation exchange capacity (CEC) was determined. Factorial experiments were designed in order to elucidate the interaction mechanisms between Cd2+ and the adsorptive sites of vermicompost. The maximum adsorptive capacity for cadmium was evaluated by a Langmuir isotherm. The characterization revealed that vermicompost exhibits high CEC values (ca. 72.9 meq per 100 g), high surface area (porous material), chelating groups and a maximum adsorptive capacity for Cd (38.6 mg g-1) at pH 5.0. This potential application was exploited in the analysis of synthetic and real (mineral water) samples with Cd concentrations of ca 5 mug L-1, requiring a preconcentration step. An enrichment factor of 100 was attained.
publishDate 2003
dc.date.none.fl_str_mv 2003-01-01
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532003000100007
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dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532003000100007
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.format.none.fl_str_mv text/html
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 Journal of the Brazilian Chemical Society v.14 n.1 2003
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
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institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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