Benzimidazole adsorption on the external and interlayer surfaces of raw and treated montmorillonite
The purpose of this study is to evaluate the efficiency of benzimidazole removal using raw, thermally and mechanically treated montmorillonite surfaces. The comparison of benzimidazole adsorption curves on these montmorillonite surfaces was made. A two step sorption mechanism that describes the data...
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2011
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01691317_v53_n3_p366_TorresSanchez http://hdl.handle.net/20.500.12110/paper_01691317_v53_n3_p366_TorresSanchez |
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paper:paper_01691317_v53_n3_p366_TorresSanchez2023-06-08T15:18:12Z Benzimidazole adsorption on the external and interlayer surfaces of raw and treated montmorillonite Benzimidazole Montmorillonite Sorption mechanism Thermal and mechanical treatments Adsorption curves Adsorption site Benzimidazoles Cationic exchange Higher temperatures Interlayer surface Iso-electric points Low temperatures Mechanical treatments Montmorillonite surface Planar monolayers Protonated Removal efficiencies Sorption mechanism Adsorption Monolayers Nitrogen Photoelectron spectroscopy X ray diffraction X ray photoelectron spectroscopy Clay minerals adsorption cation heating ion exchange montmorillonite reaction kinetics X-ray diffraction The purpose of this study is to evaluate the efficiency of benzimidazole removal using raw, thermally and mechanically treated montmorillonite surfaces. The comparison of benzimidazole adsorption curves on these montmorillonite surfaces was made. A two step sorption mechanism that describes the data was corroborated by X-ray diffraction (XRD) results.The removal efficiency for the different sorbents at pH 6 follows the sequence raw montmorillonite > thermally treated montmorillonite > mechanically treated montmorillonite.The external and the interlayer surfaces were proposed as adsorption sites. On the latter, benzimidazole adsorbs in a planar monolayer arrangement with a consequent reduced water uptake.Two different foms of benzimidazole nitrogen surface coordination were indicated by X-ray photoelectron spectroscopy (XPS) results and isoelectric point (IEP) values. Protonated and deprotonated nitrogen were equally coordinated to the surface for raw and thermally treated samples at low temperature (350 °C). Stronger coordination of deprotonated nitrogen was found for samples treated at higher temperature (550 °C), while only a cationic exchange and no coordination to the surface was observed for the mechanically treated sample. © 2010 Elsevier B.V. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01691317_v53_n3_p366_TorresSanchez http://hdl.handle.net/20.500.12110/paper_01691317_v53_n3_p366_TorresSanchez |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Benzimidazole Montmorillonite Sorption mechanism Thermal and mechanical treatments Adsorption curves Adsorption site Benzimidazoles Cationic exchange Higher temperatures Interlayer surface Iso-electric points Low temperatures Mechanical treatments Montmorillonite surface Planar monolayers Protonated Removal efficiencies Sorption mechanism Adsorption Monolayers Nitrogen Photoelectron spectroscopy X ray diffraction X ray photoelectron spectroscopy Clay minerals adsorption cation heating ion exchange montmorillonite reaction kinetics X-ray diffraction |
| spellingShingle |
Benzimidazole Montmorillonite Sorption mechanism Thermal and mechanical treatments Adsorption curves Adsorption site Benzimidazoles Cationic exchange Higher temperatures Interlayer surface Iso-electric points Low temperatures Mechanical treatments Montmorillonite surface Planar monolayers Protonated Removal efficiencies Sorption mechanism Adsorption Monolayers Nitrogen Photoelectron spectroscopy X ray diffraction X ray photoelectron spectroscopy Clay minerals adsorption cation heating ion exchange montmorillonite reaction kinetics X-ray diffraction Benzimidazole adsorption on the external and interlayer surfaces of raw and treated montmorillonite |
| topic_facet |
Benzimidazole Montmorillonite Sorption mechanism Thermal and mechanical treatments Adsorption curves Adsorption site Benzimidazoles Cationic exchange Higher temperatures Interlayer surface Iso-electric points Low temperatures Mechanical treatments Montmorillonite surface Planar monolayers Protonated Removal efficiencies Sorption mechanism Adsorption Monolayers Nitrogen Photoelectron spectroscopy X ray diffraction X ray photoelectron spectroscopy Clay minerals adsorption cation heating ion exchange montmorillonite reaction kinetics X-ray diffraction |
| description |
The purpose of this study is to evaluate the efficiency of benzimidazole removal using raw, thermally and mechanically treated montmorillonite surfaces. The comparison of benzimidazole adsorption curves on these montmorillonite surfaces was made. A two step sorption mechanism that describes the data was corroborated by X-ray diffraction (XRD) results.The removal efficiency for the different sorbents at pH 6 follows the sequence raw montmorillonite > thermally treated montmorillonite > mechanically treated montmorillonite.The external and the interlayer surfaces were proposed as adsorption sites. On the latter, benzimidazole adsorbs in a planar monolayer arrangement with a consequent reduced water uptake.Two different foms of benzimidazole nitrogen surface coordination were indicated by X-ray photoelectron spectroscopy (XPS) results and isoelectric point (IEP) values. Protonated and deprotonated nitrogen were equally coordinated to the surface for raw and thermally treated samples at low temperature (350 °C). Stronger coordination of deprotonated nitrogen was found for samples treated at higher temperature (550 °C), while only a cationic exchange and no coordination to the surface was observed for the mechanically treated sample. © 2010 Elsevier B.V. |
| title |
Benzimidazole adsorption on the external and interlayer surfaces of raw and treated montmorillonite |
| title_short |
Benzimidazole adsorption on the external and interlayer surfaces of raw and treated montmorillonite |
| title_full |
Benzimidazole adsorption on the external and interlayer surfaces of raw and treated montmorillonite |
| title_fullStr |
Benzimidazole adsorption on the external and interlayer surfaces of raw and treated montmorillonite |
| title_full_unstemmed |
Benzimidazole adsorption on the external and interlayer surfaces of raw and treated montmorillonite |
| title_sort |
benzimidazole adsorption on the external and interlayer surfaces of raw and treated montmorillonite |
| publishDate |
2011 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01691317_v53_n3_p366_TorresSanchez http://hdl.handle.net/20.500.12110/paper_01691317_v53_n3_p366_TorresSanchez |
| _version_ |
1768542455526850560 |