New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product
- Autores
- De La Fournière, Emmanuel M.; Meichtry, Jorge Martin; Custo, Graciela Susana; Gautier, Eduardo Amilcar; Litter, Marta Irene
- Año de publicación
- 2021
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Background: Thiomersal (TM), a complex between 2-mercaptobenzoic acid (2-MBA) and ethylmercury (C2H5Hg+), is an antimicrobial preservative used in immunological, ophthalmic, cosmetic products, and vaccines. Objective: TM has been treated by UV/TiO2 photocatalysis in the presence or absence of oxygen at acidic pH. C2H5Hg+, 2-MBA, and 2-sulfobenzoic acid (2-SBA) were found as products. A 2-SBA photocatalytic treatment was undertaken to study sulfur evolution. Methods: Photocatalytic runs were performed using a UVA lamp (λmax = 352 nm), open to air or under N2. A suspension of the corresponding TM or 2-SBA salt and TiO2 was prepared, and pH was adjusted. Suspensions were stirred in the dark for 30 min and then irradiated. TM, 2-MBA, 2-SBA, and C2H5Hg+ were quantified by HPLC, sulfur by TXRF, and the deposits on the photocatalyst were analyzed by chemical reactions. The mineralization degree was followed by TOC. Sulfate was determined using BaCl2 at 580 nm. Results: Photocatalytic destruction of TM and total C2H5Hg+ was complete under N2 and air, but TM degradation was much faster in air. The evolution of TM and the products followed a pseudo-first order kinetics. Conclusion: TiO2-photocatalytic degradation is a suitable technique for the treatment of TM and its degradation products. In contrast to other organomercurial compounds, TM degradation is faster in the presence of O2, indicating that the oxidative mechanism is the preferred pathway. A significant TM mineralization (> 60%, NPOC and total S) was obtained. TM was more easily degraded than 2-SBA. Sulfate was the final product.
Fil: De La Fournière, Emmanuel M.. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina
Fil: Meichtry, Jorge Martin. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Custo, Graciela Susana. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina
Fil: Gautier, Eduardo Amilcar. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina
Fil: Litter, Marta Irene. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina - Materia
-
HETEROGENEOUS PHOTOCATALYSIS
THIMEROSAL
ETHYLMERCURY
2-MERCAPTOBENZOIC ACID
2-SULFOBENZOIC ACID
TITANIUM DIOXIDE - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/165538
Ver los metadatos del registro completo
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New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid ProductDe La Fournière, Emmanuel M.Meichtry, Jorge MartinCusto, Graciela SusanaGautier, Eduardo AmilcarLitter, Marta IreneHETEROGENEOUS PHOTOCATALYSISTHIMEROSALETHYLMERCURY2-MERCAPTOBENZOIC ACID2-SULFOBENZOIC ACIDTITANIUM DIOXIDEhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1https://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2https://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Background: Thiomersal (TM), a complex between 2-mercaptobenzoic acid (2-MBA) and ethylmercury (C2H5Hg+), is an antimicrobial preservative used in immunological, ophthalmic, cosmetic products, and vaccines. Objective: TM has been treated by UV/TiO2 photocatalysis in the presence or absence of oxygen at acidic pH. C2H5Hg+, 2-MBA, and 2-sulfobenzoic acid (2-SBA) were found as products. A 2-SBA photocatalytic treatment was undertaken to study sulfur evolution. Methods: Photocatalytic runs were performed using a UVA lamp (λmax = 352 nm), open to air or under N2. A suspension of the corresponding TM or 2-SBA salt and TiO2 was prepared, and pH was adjusted. Suspensions were stirred in the dark for 30 min and then irradiated. TM, 2-MBA, 2-SBA, and C2H5Hg+ were quantified by HPLC, sulfur by TXRF, and the deposits on the photocatalyst were analyzed by chemical reactions. The mineralization degree was followed by TOC. Sulfate was determined using BaCl2 at 580 nm. Results: Photocatalytic destruction of TM and total C2H5Hg+ was complete under N2 and air, but TM degradation was much faster in air. The evolution of TM and the products followed a pseudo-first order kinetics. Conclusion: TiO2-photocatalytic degradation is a suitable technique for the treatment of TM and its degradation products. In contrast to other organomercurial compounds, TM degradation is faster in the presence of O2, indicating that the oxidative mechanism is the preferred pathway. A significant TM mineralization (> 60%, NPOC and total S) was obtained. TM was more easily degraded than 2-SBA. Sulfate was the final product.Fil: De La Fournière, Emmanuel M.. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; ArgentinaFil: Meichtry, Jorge Martin. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Custo, Graciela Susana. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); ArgentinaFil: Gautier, Eduardo Amilcar. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); ArgentinaFil: Litter, Marta Irene. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaBentham Science Publishers2021-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/vnd.openxmlformats-officedocument.wordprocessingml.documentapplication/pdfhttp://hdl.handle.net/11336/165538De La Fournière, Emmanuel M.; Meichtry, Jorge Martin; Custo, Graciela Susana; Gautier, Eduardo Amilcar; Litter, Marta Irene; New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product; Bentham Science Publishers; Journal of Photocatalysis; 2; 3; 6-2021; 1-112665-976X2665-9778CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.2174/2665976X02666210629104521info:eu-repo/semantics/altIdentifier/url/https://www.eurekaselect.com/article/116381info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:47:45Zoai:ri.conicet.gov.ar:11336/165538instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:47:46.195CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product |
| title |
New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product |
| spellingShingle |
New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product De La Fournière, Emmanuel M. HETEROGENEOUS PHOTOCATALYSIS THIMEROSAL ETHYLMERCURY 2-MERCAPTOBENZOIC ACID 2-SULFOBENZOIC ACID TITANIUM DIOXIDE |
| title_short |
New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product |
| title_full |
New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product |
| title_fullStr |
New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product |
| title_full_unstemmed |
New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product |
| title_sort |
New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product |
| dc.creator.none.fl_str_mv |
De La Fournière, Emmanuel M. Meichtry, Jorge Martin Custo, Graciela Susana Gautier, Eduardo Amilcar Litter, Marta Irene |
| author |
De La Fournière, Emmanuel M. |
| author_facet |
De La Fournière, Emmanuel M. Meichtry, Jorge Martin Custo, Graciela Susana Gautier, Eduardo Amilcar Litter, Marta Irene |
| author_role |
author |
| author2 |
Meichtry, Jorge Martin Custo, Graciela Susana Gautier, Eduardo Amilcar Litter, Marta Irene |
| author2_role |
author author author author |
| dc.subject.none.fl_str_mv |
HETEROGENEOUS PHOTOCATALYSIS THIMEROSAL ETHYLMERCURY 2-MERCAPTOBENZOIC ACID 2-SULFOBENZOIC ACID TITANIUM DIOXIDE |
| topic |
HETEROGENEOUS PHOTOCATALYSIS THIMEROSAL ETHYLMERCURY 2-MERCAPTOBENZOIC ACID 2-SULFOBENZOIC ACID TITANIUM DIOXIDE |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
Background: Thiomersal (TM), a complex between 2-mercaptobenzoic acid (2-MBA) and ethylmercury (C2H5Hg+), is an antimicrobial preservative used in immunological, ophthalmic, cosmetic products, and vaccines. Objective: TM has been treated by UV/TiO2 photocatalysis in the presence or absence of oxygen at acidic pH. C2H5Hg+, 2-MBA, and 2-sulfobenzoic acid (2-SBA) were found as products. A 2-SBA photocatalytic treatment was undertaken to study sulfur evolution. Methods: Photocatalytic runs were performed using a UVA lamp (λmax = 352 nm), open to air or under N2. A suspension of the corresponding TM or 2-SBA salt and TiO2 was prepared, and pH was adjusted. Suspensions were stirred in the dark for 30 min and then irradiated. TM, 2-MBA, 2-SBA, and C2H5Hg+ were quantified by HPLC, sulfur by TXRF, and the deposits on the photocatalyst were analyzed by chemical reactions. The mineralization degree was followed by TOC. Sulfate was determined using BaCl2 at 580 nm. Results: Photocatalytic destruction of TM and total C2H5Hg+ was complete under N2 and air, but TM degradation was much faster in air. The evolution of TM and the products followed a pseudo-first order kinetics. Conclusion: TiO2-photocatalytic degradation is a suitable technique for the treatment of TM and its degradation products. In contrast to other organomercurial compounds, TM degradation is faster in the presence of O2, indicating that the oxidative mechanism is the preferred pathway. A significant TM mineralization (> 60%, NPOC and total S) was obtained. TM was more easily degraded than 2-SBA. Sulfate was the final product. Fil: De La Fournière, Emmanuel M.. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina Fil: Meichtry, Jorge Martin. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Custo, Graciela Susana. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina Fil: Gautier, Eduardo Amilcar. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina Fil: Litter, Marta Irene. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina |
| description |
Background: Thiomersal (TM), a complex between 2-mercaptobenzoic acid (2-MBA) and ethylmercury (C2H5Hg+), is an antimicrobial preservative used in immunological, ophthalmic, cosmetic products, and vaccines. Objective: TM has been treated by UV/TiO2 photocatalysis in the presence or absence of oxygen at acidic pH. C2H5Hg+, 2-MBA, and 2-sulfobenzoic acid (2-SBA) were found as products. A 2-SBA photocatalytic treatment was undertaken to study sulfur evolution. Methods: Photocatalytic runs were performed using a UVA lamp (λmax = 352 nm), open to air or under N2. A suspension of the corresponding TM or 2-SBA salt and TiO2 was prepared, and pH was adjusted. Suspensions were stirred in the dark for 30 min and then irradiated. TM, 2-MBA, 2-SBA, and C2H5Hg+ were quantified by HPLC, sulfur by TXRF, and the deposits on the photocatalyst were analyzed by chemical reactions. The mineralization degree was followed by TOC. Sulfate was determined using BaCl2 at 580 nm. Results: Photocatalytic destruction of TM and total C2H5Hg+ was complete under N2 and air, but TM degradation was much faster in air. The evolution of TM and the products followed a pseudo-first order kinetics. Conclusion: TiO2-photocatalytic degradation is a suitable technique for the treatment of TM and its degradation products. In contrast to other organomercurial compounds, TM degradation is faster in the presence of O2, indicating that the oxidative mechanism is the preferred pathway. A significant TM mineralization (> 60%, NPOC and total S) was obtained. TM was more easily degraded than 2-SBA. Sulfate was the final product. |
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2021 |
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2021-06 |
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http://hdl.handle.net/11336/165538 De La Fournière, Emmanuel M.; Meichtry, Jorge Martin; Custo, Graciela Susana; Gautier, Eduardo Amilcar; Litter, Marta Irene; New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product; Bentham Science Publishers; Journal of Photocatalysis; 2; 3; 6-2021; 1-11 2665-976X 2665-9778 CONICET Digital CONICET |
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De La Fournière, Emmanuel M.; Meichtry, Jorge Martin; Custo, Graciela Susana; Gautier, Eduardo Amilcar; Litter, Marta Irene; New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product; Bentham Science Publishers; Journal of Photocatalysis; 2; 3; 6-2021; 1-11 2665-976X 2665-9778 CONICET Digital CONICET |
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eng |
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eng |
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