Detection of azo dyes using carbon dots from olive mill wastes

Detalhes bibliográficos
Autor(a) principal: Sousa, Diogo A.
Data de Publicação: 2022
Outros Autores: Berberan-Santos, Mario, Prata, José Virgílio
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.21/16144
Resumo: Azo dyes are widely spread in our day life, being heavily used in cosmetics, healthcare products, textile industries, and as artificial food colorants. This intense industrial activity, which inherently includes their own production, inexorably leads to uncontrolled release of dyes into the environment. As emerging pollutants, their detection, particularly in water systems, is a priority. Herein, a fluorescence-based method was employed for the sensitive and selective detection of anionic and neutral azo dyes. Carbon dots (CDs) synthesized from wet pomace (WP), an abundant semi-solid waste of olive mills, were used as probes. An outstanding capability for detection of azo dyes methyl orange (MO) and methyl red (MR) in aqueous solutions was disclosed, which reached a limit of detection (LOD) of 151 ppb for MO. The selectivity of WP-CDs for the anionic azo dye (MO) was established through competitive experiments with other dyes, either anionic (indigo carmine) or cationic (fuchsin, methylene blue, and rhodamine 6G); perchlorate salts of transition metal cations (Cu(II), Co(II), Fe(II), Fe(III), Hg(II), and Pb(II)); and sodium salts of common anions (NO3-, CO32-, Cl-, and SO42-). Evidence has been collected that supports static quenching as the main transduction event underlying the observed quenching of the probe's fluorescence, combined with a dynamic resonance energy transfer (RET) mechanism at high MO concentrations.
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spelling Detection of azo dyes using carbon dots from olive mill wastesAzo dyesCarbon dotsOlive mill wasteSensorFluorescencePollutants detectionAzo dyes are widely spread in our day life, being heavily used in cosmetics, healthcare products, textile industries, and as artificial food colorants. This intense industrial activity, which inherently includes their own production, inexorably leads to uncontrolled release of dyes into the environment. As emerging pollutants, their detection, particularly in water systems, is a priority. Herein, a fluorescence-based method was employed for the sensitive and selective detection of anionic and neutral azo dyes. Carbon dots (CDs) synthesized from wet pomace (WP), an abundant semi-solid waste of olive mills, were used as probes. An outstanding capability for detection of azo dyes methyl orange (MO) and methyl red (MR) in aqueous solutions was disclosed, which reached a limit of detection (LOD) of 151 ppb for MO. The selectivity of WP-CDs for the anionic azo dye (MO) was established through competitive experiments with other dyes, either anionic (indigo carmine) or cationic (fuchsin, methylene blue, and rhodamine 6G); perchlorate salts of transition metal cations (Cu(II), Co(II), Fe(II), Fe(III), Hg(II), and Pb(II)); and sodium salts of common anions (NO3-, CO32-, Cl-, and SO42-). Evidence has been collected that supports static quenching as the main transduction event underlying the observed quenching of the probe's fluorescence, combined with a dynamic resonance energy transfer (RET) mechanism at high MO concentrations.MDPIRCIPLSousa, Diogo A.Berberan-Santos, MarioPrata, José Virgílio2023-05-26T08:55:49Z2022-11-162022-11-16T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/16144engSOUSA, Diogo A.; BERBERAN-SANTOS, Mário; PRATA, José Virgílio – Detection of azo dyes using carbon dots from olive mill wastes. Chemosensors. eISSN 2227-9040. Vol. 10, N.º 11 (2022), pp. 1-14.10.3390/chemosensors101104872227-9040info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-03T10:14:30Zoai:repositorio.ipl.pt:10400.21/16144Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:23:44.147207Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Detection of azo dyes using carbon dots from olive mill wastes
title Detection of azo dyes using carbon dots from olive mill wastes
spellingShingle Detection of azo dyes using carbon dots from olive mill wastes
Sousa, Diogo A.
Azo dyes
Carbon dots
Olive mill waste
Sensor
Fluorescence
Pollutants detection
title_short Detection of azo dyes using carbon dots from olive mill wastes
title_full Detection of azo dyes using carbon dots from olive mill wastes
title_fullStr Detection of azo dyes using carbon dots from olive mill wastes
title_full_unstemmed Detection of azo dyes using carbon dots from olive mill wastes
title_sort Detection of azo dyes using carbon dots from olive mill wastes
author Sousa, Diogo A.
author_facet Sousa, Diogo A.
Berberan-Santos, Mario
Prata, José Virgílio
author_role author
author2 Berberan-Santos, Mario
Prata, José Virgílio
author2_role author
author
dc.contributor.none.fl_str_mv RCIPL
dc.contributor.author.fl_str_mv Sousa, Diogo A.
Berberan-Santos, Mario
Prata, José Virgílio
dc.subject.por.fl_str_mv Azo dyes
Carbon dots
Olive mill waste
Sensor
Fluorescence
Pollutants detection
topic Azo dyes
Carbon dots
Olive mill waste
Sensor
Fluorescence
Pollutants detection
description Azo dyes are widely spread in our day life, being heavily used in cosmetics, healthcare products, textile industries, and as artificial food colorants. This intense industrial activity, which inherently includes their own production, inexorably leads to uncontrolled release of dyes into the environment. As emerging pollutants, their detection, particularly in water systems, is a priority. Herein, a fluorescence-based method was employed for the sensitive and selective detection of anionic and neutral azo dyes. Carbon dots (CDs) synthesized from wet pomace (WP), an abundant semi-solid waste of olive mills, were used as probes. An outstanding capability for detection of azo dyes methyl orange (MO) and methyl red (MR) in aqueous solutions was disclosed, which reached a limit of detection (LOD) of 151 ppb for MO. The selectivity of WP-CDs for the anionic azo dye (MO) was established through competitive experiments with other dyes, either anionic (indigo carmine) or cationic (fuchsin, methylene blue, and rhodamine 6G); perchlorate salts of transition metal cations (Cu(II), Co(II), Fe(II), Fe(III), Hg(II), and Pb(II)); and sodium salts of common anions (NO3-, CO32-, Cl-, and SO42-). Evidence has been collected that supports static quenching as the main transduction event underlying the observed quenching of the probe's fluorescence, combined with a dynamic resonance energy transfer (RET) mechanism at high MO concentrations.
publishDate 2022
dc.date.none.fl_str_mv 2022-11-16
2022-11-16T00:00:00Z
2023-05-26T08:55:49Z
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://hdl.handle.net/10400.21/16144
url http://hdl.handle.net/10400.21/16144
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv SOUSA, Diogo A.; BERBERAN-SANTOS, Mário; PRATA, José Virgílio – Detection of azo dyes using carbon dots from olive mill wastes. Chemosensors. eISSN 2227-9040. Vol. 10, N.º 11 (2022), pp. 1-14.
10.3390/chemosensors10110487
2227-9040
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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