Enhanced As (V) Adsorption Properties in Sn-Substituted Goethites - Changes in Chemical Reactivity and Surface Characteristics
- Autores
- Larralde, Ana Laura; Tufo, Ana Elisabeth; Morando, Pedro Juan; Sileo, Elsa Ester
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- In this work, the adsorption of arsenic (V) onto crystalline substituted goethites was studied for samples with different Sn- contents. The highest Sn-content of the prepared samples was 5.5 (expressed as 100?[Sn]/[Sn]+[Fe]) as all attempts to prepare goethites with higher tin content only rendered amorphous materials. The Sn-for-Fe substitution caused changes on the physico-chemical properties of the obtained samples, and the thermal analysis indicated that the formed Sn-goethites were metal-deficient goethites with increased thermal stabilization towards decomposition to hematite. BET surface analysis evidenced the presence of large mesoporous or macroporous in all samples and the following trend in SSA values: GSn5.5 (54.90±0.08) > GSn0 (25.75±0.09) > GSn2.1 (17.19±0.05 m2g-1). The As(V) adsorption presented a maximum at pH = 5.50 ± 0.05 for all samples and the data showed that GSn5.5 nearly duplicates the amount of As adsorbed per gram of pure goethite. To evaluate the chemical stability of the samples, dissolution kinetics measurements in acidic conditions were also performed. Dissolution rate followed the trend GSn2.1 > GSn0 > GSn5.5. The facts that GSn5.5 dissolves slower than the pure sample and that adsorbs twice as much as pure goethite indicate that GSn5.5 is a promising agent for As(V) removal technologies.
Fil: Larralde, Ana Laura. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Tufo, Ana Elisabeth. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología; Argentina
Fil: Morando, Pedro Juan. Comisión Nacional de Energía Atómica; Argentina. Universidad Nacional de San Martín; Argentina
Fil: Sileo, Elsa Ester. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina - Fuente
- International Journal of Innovative Research in Engineering & Management
http://www.ijirem.org/IJIREM/ArchInfo.aspx?rep=95 - Materia
-
ARSENIC
ADSORPTION
THERMAL STABILITY
SPECIFIC SURFACE AREA
CIENCIAS QUÍMICA
CIENCIAS NATURALES Y EXACTAS - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de General San Martín
- OAI Identificador
- oai:ri.unsam.edu.ar:123456789/996
Ver los metadatos del registro completo
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Enhanced As (V) Adsorption Properties in Sn-Substituted Goethites - Changes in Chemical Reactivity and Surface CharacteristicsLarralde, Ana LauraTufo, Ana ElisabethMorando, Pedro JuanSileo, Elsa EsterARSENICADSORPTIONTHERMAL STABILITYSPECIFIC SURFACE AREACIENCIAS QUÍMICACIENCIAS NATURALES Y EXACTASIn this work, the adsorption of arsenic (V) onto crystalline substituted goethites was studied for samples with different Sn- contents. The highest Sn-content of the prepared samples was 5.5 (expressed as 100?[Sn]/[Sn]+[Fe]) as all attempts to prepare goethites with higher tin content only rendered amorphous materials. The Sn-for-Fe substitution caused changes on the physico-chemical properties of the obtained samples, and the thermal analysis indicated that the formed Sn-goethites were metal-deficient goethites with increased thermal stabilization towards decomposition to hematite. BET surface analysis evidenced the presence of large mesoporous or macroporous in all samples and the following trend in SSA values: GSn5.5 (54.90±0.08) > GSn0 (25.75±0.09) > GSn2.1 (17.19±0.05 m2g-1). The As(V) adsorption presented a maximum at pH = 5.50 ± 0.05 for all samples and the data showed that GSn5.5 nearly duplicates the amount of As adsorbed per gram of pure goethite. To evaluate the chemical stability of the samples, dissolution kinetics measurements in acidic conditions were also performed. Dissolution rate followed the trend GSn2.1 > GSn0 > GSn5.5. The facts that GSn5.5 dissolves slower than the pure sample and that adsorbs twice as much as pure goethite indicate that GSn5.5 is a promising agent for As(V) removal technologies.Fil: Larralde, Ana Laura. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Tufo, Ana Elisabeth. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología; ArgentinaFil: Morando, Pedro Juan. Comisión Nacional de Energía Atómica; Argentina. Universidad Nacional de San Martín; ArgentinaFil: Sileo, Elsa Ester. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaInternational Journal of Innovative Research in Engineering & Management2015-11info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfpp. 63-70application/pdfLarralde, A. L.; Tufo, A. E.; Morando, P. J.; Sileo, E. E. (nov 2015). Enhanced As (V) Adsorption Properties in Sn-Substituted Goethites - Changes in Chemical Reactivity and Surface Characteristics; International Journal of Innovative Research in Engineering & Management; International Journal of Innovative Research in Engineering & Management; 2 (6) 63-702350-0557https://ri.unsam.edu.ar/handle/123456789/996International Journal of Innovative Research in Engineering & Managementhttp://www.ijirem.org/IJIREM/ArchInfo.aspx?rep=95reponame:Repositorio Institucional (UNSAM)instname:Universidad Nacional de General San Martínenginfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/Creative Commons Atribución-NoComercial-CompartirIgual 2.5 Argentina (CC BY-NC-SA 2.5)2025-09-29T14:30:20Zoai:ri.unsam.edu.ar:123456789/996instacron:UNSAMInstitucionalhttp://ri.unsam.edu.arUniversidad públicaNo correspondehttp://ri.unsam.edu.ar/oai/lpastran@unsam.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:s2025-09-29 14:31:15.523Repositorio Institucional (UNSAM) - Universidad Nacional de General San Martínfalse |
| dc.title.none.fl_str_mv |
Enhanced As (V) Adsorption Properties in Sn-Substituted Goethites - Changes in Chemical Reactivity and Surface Characteristics |
| title |
Enhanced As (V) Adsorption Properties in Sn-Substituted Goethites - Changes in Chemical Reactivity and Surface Characteristics |
| spellingShingle |
Enhanced As (V) Adsorption Properties in Sn-Substituted Goethites - Changes in Chemical Reactivity and Surface Characteristics Larralde, Ana Laura ARSENIC ADSORPTION THERMAL STABILITY SPECIFIC SURFACE AREA CIENCIAS QUÍMICA CIENCIAS NATURALES Y EXACTAS |
| title_short |
Enhanced As (V) Adsorption Properties in Sn-Substituted Goethites - Changes in Chemical Reactivity and Surface Characteristics |
| title_full |
Enhanced As (V) Adsorption Properties in Sn-Substituted Goethites - Changes in Chemical Reactivity and Surface Characteristics |
| title_fullStr |
Enhanced As (V) Adsorption Properties in Sn-Substituted Goethites - Changes in Chemical Reactivity and Surface Characteristics |
| title_full_unstemmed |
Enhanced As (V) Adsorption Properties in Sn-Substituted Goethites - Changes in Chemical Reactivity and Surface Characteristics |
| title_sort |
Enhanced As (V) Adsorption Properties in Sn-Substituted Goethites - Changes in Chemical Reactivity and Surface Characteristics |
| dc.creator.none.fl_str_mv |
Larralde, Ana Laura Tufo, Ana Elisabeth Morando, Pedro Juan Sileo, Elsa Ester |
| author |
Larralde, Ana Laura |
| author_facet |
Larralde, Ana Laura Tufo, Ana Elisabeth Morando, Pedro Juan Sileo, Elsa Ester |
| author_role |
author |
| author2 |
Tufo, Ana Elisabeth Morando, Pedro Juan Sileo, Elsa Ester |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
ARSENIC ADSORPTION THERMAL STABILITY SPECIFIC SURFACE AREA CIENCIAS QUÍMICA CIENCIAS NATURALES Y EXACTAS |
| topic |
ARSENIC ADSORPTION THERMAL STABILITY SPECIFIC SURFACE AREA CIENCIAS QUÍMICA CIENCIAS NATURALES Y EXACTAS |
| dc.description.none.fl_txt_mv |
In this work, the adsorption of arsenic (V) onto crystalline substituted goethites was studied for samples with different Sn- contents. The highest Sn-content of the prepared samples was 5.5 (expressed as 100?[Sn]/[Sn]+[Fe]) as all attempts to prepare goethites with higher tin content only rendered amorphous materials. The Sn-for-Fe substitution caused changes on the physico-chemical properties of the obtained samples, and the thermal analysis indicated that the formed Sn-goethites were metal-deficient goethites with increased thermal stabilization towards decomposition to hematite. BET surface analysis evidenced the presence of large mesoporous or macroporous in all samples and the following trend in SSA values: GSn5.5 (54.90±0.08) > GSn0 (25.75±0.09) > GSn2.1 (17.19±0.05 m2g-1). The As(V) adsorption presented a maximum at pH = 5.50 ± 0.05 for all samples and the data showed that GSn5.5 nearly duplicates the amount of As adsorbed per gram of pure goethite. To evaluate the chemical stability of the samples, dissolution kinetics measurements in acidic conditions were also performed. Dissolution rate followed the trend GSn2.1 > GSn0 > GSn5.5. The facts that GSn5.5 dissolves slower than the pure sample and that adsorbs twice as much as pure goethite indicate that GSn5.5 is a promising agent for As(V) removal technologies. Fil: Larralde, Ana Laura. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina Fil: Tufo, Ana Elisabeth. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología; Argentina Fil: Morando, Pedro Juan. Comisión Nacional de Energía Atómica; Argentina. Universidad Nacional de San Martín; Argentina Fil: Sileo, Elsa Ester. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina |
| description |
In this work, the adsorption of arsenic (V) onto crystalline substituted goethites was studied for samples with different Sn- contents. The highest Sn-content of the prepared samples was 5.5 (expressed as 100?[Sn]/[Sn]+[Fe]) as all attempts to prepare goethites with higher tin content only rendered amorphous materials. The Sn-for-Fe substitution caused changes on the physico-chemical properties of the obtained samples, and the thermal analysis indicated that the formed Sn-goethites were metal-deficient goethites with increased thermal stabilization towards decomposition to hematite. BET surface analysis evidenced the presence of large mesoporous or macroporous in all samples and the following trend in SSA values: GSn5.5 (54.90±0.08) > GSn0 (25.75±0.09) > GSn2.1 (17.19±0.05 m2g-1). The As(V) adsorption presented a maximum at pH = 5.50 ± 0.05 for all samples and the data showed that GSn5.5 nearly duplicates the amount of As adsorbed per gram of pure goethite. To evaluate the chemical stability of the samples, dissolution kinetics measurements in acidic conditions were also performed. Dissolution rate followed the trend GSn2.1 > GSn0 > GSn5.5. The facts that GSn5.5 dissolves slower than the pure sample and that adsorbs twice as much as pure goethite indicate that GSn5.5 is a promising agent for As(V) removal technologies. |
| publishDate |
2015 |
| dc.date.none.fl_str_mv |
2015-11 |
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info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
| status_str |
publishedVersion |
| format |
article |
| dc.identifier.none.fl_str_mv |
Larralde, A. L.; Tufo, A. E.; Morando, P. J.; Sileo, E. E. (nov 2015). Enhanced As (V) Adsorption Properties in Sn-Substituted Goethites - Changes in Chemical Reactivity and Surface Characteristics; International Journal of Innovative Research in Engineering & Management; International Journal of Innovative Research in Engineering & Management; 2 (6) 63-70 2350-0557 https://ri.unsam.edu.ar/handle/123456789/996 |
| identifier_str_mv |
Larralde, A. L.; Tufo, A. E.; Morando, P. J.; Sileo, E. E. (nov 2015). Enhanced As (V) Adsorption Properties in Sn-Substituted Goethites - Changes in Chemical Reactivity and Surface Characteristics; International Journal of Innovative Research in Engineering & Management; International Journal of Innovative Research in Engineering & Management; 2 (6) 63-70 2350-0557 |
| url |
https://ri.unsam.edu.ar/handle/123456789/996 |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
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info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Creative Commons Atribución-NoComercial-CompartirIgual 2.5 Argentina (CC BY-NC-SA 2.5) |
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openAccess |
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https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Creative Commons Atribución-NoComercial-CompartirIgual 2.5 Argentina (CC BY-NC-SA 2.5) |
| dc.format.none.fl_str_mv |
application/pdf pp. 63-70 application/pdf |
| dc.publisher.none.fl_str_mv |
International Journal of Innovative Research in Engineering & Management |
| publisher.none.fl_str_mv |
International Journal of Innovative Research in Engineering & Management |
| dc.source.none.fl_str_mv |
International Journal of Innovative Research in Engineering & Management http://www.ijirem.org/IJIREM/ArchInfo.aspx?rep=95 reponame:Repositorio Institucional (UNSAM) instname:Universidad Nacional de General San Martín |
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Universidad Nacional de General San Martín |
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Repositorio Institucional (UNSAM) - Universidad Nacional de General San Martín |
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lpastran@unsam.edu.ar |
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12.559606 |