Preparation of a clay-modified carbon paste electrode based on 2-thiazoline-2-thiol-hexadecylammonium sorption for the sensitive determination of mercury
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/10.2116/analsci.21.1309 http://hdl.handle.net/11449/132336 |
Resumo: | A montmorillonite from Wyoming-USA was used to prepare an organo-clay complex, named 2-thiazoline-2-thiol-hexadecyltrimethylammonium-clay (TZT-HDTA-clay), for the purpose of the selective adsorption of the heavy metals ions and possible use as a chemically modified carbon paste electrode (CMCPE). Adsorption isotherms of Hg 2+, Pb 2+, Cd 2+, Cu 2+, and Zn 2+ from aqueous solutions as a function of the pH were studied at 298 K. Conditions for quantitative retention and elution were established for each metal by batch and column methods. The organo-clay complex was very selective to Hg(II) in aqueous solution in which other metals and ions were also present. The accumulation voltammetry of Hg(II) was studied at a carbon paste electrode chemically modified with this material. The mercury response was evaluated with respect to the pH, electrode composition, preconcentration time, mercury concentration, cleaning solution, possible interferences and other variables. A carbon paste electrode modified by TZT-HDTA-clay showed two peaks: one cathodic peak at about 0.0 V and an anodic peak at 0.25 V, scanning the potential from -0.2 to 0.8 V (0.05 M KNO 3 vs. Ag/AgCl). The anodic peak at 0.25 V presents excellent selectivity for Hg(II) ions in the presence of foreign ions. The detection limit was estimated as 0.1 μg L -1. The precision of determination was satisfactory for the respective concentration level. 2005 © The Japan Society for Analytical Chemistry. |
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Preparation of a clay-modified carbon paste electrode based on 2-thiazoline-2-thiol-hexadecylammonium sorption for the sensitive determination of mercury2-mercaptothiazolineAluminum silicateAnionBentoniteCarbonCetrimideDivalent cationFresh waterMercurySea waterThiazole derivativeThiazolidine derivativeThyroidanAdsorptionCalibrationChemistryClayElectrochemistryIon selective electrodeOxidation reduction reactionPHReproducibilityX ray diffractionAdsorptionAluminum SilicatesAnionsBentoniteCalibrationCarbonCations, DivalentCetrimonium CompoundsElectrochemistryFresh WaterHydrogen-Ion ConcentrationIon-Selective ElectrodesMercuryOxidation-ReductionReproducibility of ResultsSeawaterThiazolesThiazolidinesX-Ray DiffractionA montmorillonite from Wyoming-USA was used to prepare an organo-clay complex, named 2-thiazoline-2-thiol-hexadecyltrimethylammonium-clay (TZT-HDTA-clay), for the purpose of the selective adsorption of the heavy metals ions and possible use as a chemically modified carbon paste electrode (CMCPE). Adsorption isotherms of Hg 2+, Pb 2+, Cd 2+, Cu 2+, and Zn 2+ from aqueous solutions as a function of the pH were studied at 298 K. Conditions for quantitative retention and elution were established for each metal by batch and column methods. The organo-clay complex was very selective to Hg(II) in aqueous solution in which other metals and ions were also present. The accumulation voltammetry of Hg(II) was studied at a carbon paste electrode chemically modified with this material. The mercury response was evaluated with respect to the pH, electrode composition, preconcentration time, mercury concentration, cleaning solution, possible interferences and other variables. A carbon paste electrode modified by TZT-HDTA-clay showed two peaks: one cathodic peak at about 0.0 V and an anodic peak at 0.25 V, scanning the potential from -0.2 to 0.8 V (0.05 M KNO 3 vs. Ag/AgCl). The anodic peak at 0.25 V presents excellent selectivity for Hg(II) ions in the presence of foreign ions. The detection limit was estimated as 0.1 μg L -1. The precision of determination was satisfactory for the respective concentration level. 2005 © The Japan Society for Analytical Chemistry.Departamento de Física e Química Unesp-Universidade Estadual Paulista, Av. Brasil, 56-Centro, C. P. 31, 15385-000 Ilha Solteira, SPInstituto de Química de São Carlos Universidade de São Paulo, C. P. 369, 13560-970 São Carlos, SPDepartamento de Engenharia Ambiental Unesp-Universidade Estadual Paulista, CEP 18087-180, Sorocaba, SPDepartamento de Física e Química Unesp-Universidade Estadual Paulista, Av. Brasil, 56-Centro, C. P. 31, 15385-000 Ilha Solteira, SPDepartamento de Engenharia Ambiental Unesp-Universidade Estadual Paulista, CEP 18087-180, Sorocaba, SPUniversidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Dias Filho, Newton L. [UNESP]Carmo, Devaney R. do [UNESP]Gessner, FergusRosa, André H. [UNESP]2014-05-27T11:21:40Z2014-05-27T11:21:40Z2005-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1309-1316application/pdfhttp://dx.doi.org/10.2116/analsci.21.1309Analytical Sciences, v. 21, n. 11, p. 1309-1316, 2005.0910-63401348-2246http://hdl.handle.net/11449/13233610.2116/analsci.21.1309WOS:0002341204000102-s2.0-284444874442-s2.0-28444487444.pdf0000-0002-2042-018XScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAnalytical Sciences1.3550,4240,424info:eu-repo/semantics/openAccess2023-11-18T06:12:33Zoai:repositorio.unesp.br:11449/132336Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-18T06:12:33Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Preparation of a clay-modified carbon paste electrode based on 2-thiazoline-2-thiol-hexadecylammonium sorption for the sensitive determination of mercury |
title |
Preparation of a clay-modified carbon paste electrode based on 2-thiazoline-2-thiol-hexadecylammonium sorption for the sensitive determination of mercury |
spellingShingle |
Preparation of a clay-modified carbon paste electrode based on 2-thiazoline-2-thiol-hexadecylammonium sorption for the sensitive determination of mercury Dias Filho, Newton L. [UNESP] 2-mercaptothiazoline Aluminum silicate Anion Bentonite Carbon Cetrimide Divalent cation Fresh water Mercury Sea water Thiazole derivative Thiazolidine derivative Thyroidan Adsorption Calibration Chemistry Clay Electrochemistry Ion selective electrode Oxidation reduction reaction PH Reproducibility X ray diffraction Adsorption Aluminum Silicates Anions Bentonite Calibration Carbon Cations, Divalent Cetrimonium Compounds Electrochemistry Fresh Water Hydrogen-Ion Concentration Ion-Selective Electrodes Mercury Oxidation-Reduction Reproducibility of Results Seawater Thiazoles Thiazolidines X-Ray Diffraction |
title_short |
Preparation of a clay-modified carbon paste electrode based on 2-thiazoline-2-thiol-hexadecylammonium sorption for the sensitive determination of mercury |
title_full |
Preparation of a clay-modified carbon paste electrode based on 2-thiazoline-2-thiol-hexadecylammonium sorption for the sensitive determination of mercury |
title_fullStr |
Preparation of a clay-modified carbon paste electrode based on 2-thiazoline-2-thiol-hexadecylammonium sorption for the sensitive determination of mercury |
title_full_unstemmed |
Preparation of a clay-modified carbon paste electrode based on 2-thiazoline-2-thiol-hexadecylammonium sorption for the sensitive determination of mercury |
title_sort |
Preparation of a clay-modified carbon paste electrode based on 2-thiazoline-2-thiol-hexadecylammonium sorption for the sensitive determination of mercury |
author |
Dias Filho, Newton L. [UNESP] |
author_facet |
Dias Filho, Newton L. [UNESP] Carmo, Devaney R. do [UNESP] Gessner, Fergus Rosa, André H. [UNESP] |
author_role |
author |
author2 |
Carmo, Devaney R. do [UNESP] Gessner, Fergus Rosa, André H. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Dias Filho, Newton L. [UNESP] Carmo, Devaney R. do [UNESP] Gessner, Fergus Rosa, André H. [UNESP] |
dc.subject.por.fl_str_mv |
2-mercaptothiazoline Aluminum silicate Anion Bentonite Carbon Cetrimide Divalent cation Fresh water Mercury Sea water Thiazole derivative Thiazolidine derivative Thyroidan Adsorption Calibration Chemistry Clay Electrochemistry Ion selective electrode Oxidation reduction reaction PH Reproducibility X ray diffraction Adsorption Aluminum Silicates Anions Bentonite Calibration Carbon Cations, Divalent Cetrimonium Compounds Electrochemistry Fresh Water Hydrogen-Ion Concentration Ion-Selective Electrodes Mercury Oxidation-Reduction Reproducibility of Results Seawater Thiazoles Thiazolidines X-Ray Diffraction |
topic |
2-mercaptothiazoline Aluminum silicate Anion Bentonite Carbon Cetrimide Divalent cation Fresh water Mercury Sea water Thiazole derivative Thiazolidine derivative Thyroidan Adsorption Calibration Chemistry Clay Electrochemistry Ion selective electrode Oxidation reduction reaction PH Reproducibility X ray diffraction Adsorption Aluminum Silicates Anions Bentonite Calibration Carbon Cations, Divalent Cetrimonium Compounds Electrochemistry Fresh Water Hydrogen-Ion Concentration Ion-Selective Electrodes Mercury Oxidation-Reduction Reproducibility of Results Seawater Thiazoles Thiazolidines X-Ray Diffraction |
description |
A montmorillonite from Wyoming-USA was used to prepare an organo-clay complex, named 2-thiazoline-2-thiol-hexadecyltrimethylammonium-clay (TZT-HDTA-clay), for the purpose of the selective adsorption of the heavy metals ions and possible use as a chemically modified carbon paste electrode (CMCPE). Adsorption isotherms of Hg 2+, Pb 2+, Cd 2+, Cu 2+, and Zn 2+ from aqueous solutions as a function of the pH were studied at 298 K. Conditions for quantitative retention and elution were established for each metal by batch and column methods. The organo-clay complex was very selective to Hg(II) in aqueous solution in which other metals and ions were also present. The accumulation voltammetry of Hg(II) was studied at a carbon paste electrode chemically modified with this material. The mercury response was evaluated with respect to the pH, electrode composition, preconcentration time, mercury concentration, cleaning solution, possible interferences and other variables. A carbon paste electrode modified by TZT-HDTA-clay showed two peaks: one cathodic peak at about 0.0 V and an anodic peak at 0.25 V, scanning the potential from -0.2 to 0.8 V (0.05 M KNO 3 vs. Ag/AgCl). The anodic peak at 0.25 V presents excellent selectivity for Hg(II) ions in the presence of foreign ions. The detection limit was estimated as 0.1 μg L -1. The precision of determination was satisfactory for the respective concentration level. 2005 © The Japan Society for Analytical Chemistry. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-11-01 2014-05-27T11:21:40Z 2014-05-27T11:21:40Z |
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/10.2116/analsci.21.1309 Analytical Sciences, v. 21, n. 11, p. 1309-1316, 2005. 0910-6340 1348-2246 http://hdl.handle.net/11449/132336 10.2116/analsci.21.1309 WOS:000234120400010 2-s2.0-28444487444 2-s2.0-28444487444.pdf 0000-0002-2042-018X |
url |
http://dx.doi.org/10.2116/analsci.21.1309 http://hdl.handle.net/11449/132336 |
identifier_str_mv |
Analytical Sciences, v. 21, n. 11, p. 1309-1316, 2005. 0910-6340 1348-2246 10.2116/analsci.21.1309 WOS:000234120400010 2-s2.0-28444487444 2-s2.0-28444487444.pdf 0000-0002-2042-018X |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Analytical Sciences 1.355 0,424 0,424 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1309-1316 application/pdf |
dc.source.none.fl_str_mv |
Scopus 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 |
|
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1799964979355451392 |