Adsorption of picloram herbicide on iron oxide pillared montmorillonite
The adsorption of picloram on Fe Oxide Pillared Clays (PILC) as a possible basis for the development of adsorbent materials for the remediation of polluted environments was studied. To this end, after characterizing PILC obtained from raw clay from Wyoming, USA by XRD, elemental analysis, Mössbauer...
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paper:paper_01691317_v58_n_p25_MarcoBrown2023-06-08T15:18:12Z Adsorption of picloram herbicide on iron oxide pillared montmorillonite Brown, José Luis Marco Herbicides Montmorillonite Picloram Pillared clay Adsorbent materials Fe oxide Freundlich models FTIR Inner sphere complexes Interlayer spaces Iron centers Langmuirs Picloram Pillared clay Pillared montmorillonite Pyridinic nitrogen Raw clay Ssbauer spectroscopies Surface area Wyoming ,USA XRD Adsorption Clay minerals Fourier transform infrared spectroscopy Ionic strength Iron compounds Iron oxides Pollution Pyridine Spheres Weed control Herbicides adsorption aqueous solution herbicide iron oxide montmorillonite pH phase equilibrium pillared clay remediation The adsorption of picloram on Fe Oxide Pillared Clays (PILC) as a possible basis for the development of adsorbent materials for the remediation of polluted environments was studied. To this end, after characterizing PILC obtained from raw clay from Wyoming, USA by XRD, elemental analysis, Mössbauer spectroscopy, DTA, TGA and N 2 adsorption (BET), the picloram adsorption was studied at constant pH and ionic strength after 48h equilibration with an aqueous solution of PCM. PCM adsorbed samples were characterized by SEM, zeta-potential vs pH functions, FTIR and TGA-DTA and the adsorption was modellated using Langmuir and Freundlich models. The results reveal that the surface area and interlayer space of PILC are bigger than those of raw montmorillonite. An analysis of the adsorption isotherms of picloram on the PILC showed that picloram adsorption increases with decreasing pH. The adsorption of PCM on PILC was 150 times higher than that found for raw montmorillonite under similar conditions. The zeta-potential vs pH functions shape and FTIR indicated that PCM coordinates the surface iron centers throughout pyridinic nitrogen atom forming inner-sphere complexes. The much greater PCM adsorption on PILC turns the process into an excellent candidate to be used for dosing or remediation of pesticides. © 2012 Elsevier B.V. Fil:Marco-Brown, J.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01691317_v58_n_p25_MarcoBrown http://hdl.handle.net/20.500.12110/paper_01691317_v58_n_p25_MarcoBrown |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Herbicides Montmorillonite Picloram Pillared clay Adsorbent materials Fe oxide Freundlich models FTIR Inner sphere complexes Interlayer spaces Iron centers Langmuirs Picloram Pillared clay Pillared montmorillonite Pyridinic nitrogen Raw clay Ssbauer spectroscopies Surface area Wyoming ,USA XRD Adsorption Clay minerals Fourier transform infrared spectroscopy Ionic strength Iron compounds Iron oxides Pollution Pyridine Spheres Weed control Herbicides adsorption aqueous solution herbicide iron oxide montmorillonite pH phase equilibrium pillared clay remediation |
| spellingShingle |
Herbicides Montmorillonite Picloram Pillared clay Adsorbent materials Fe oxide Freundlich models FTIR Inner sphere complexes Interlayer spaces Iron centers Langmuirs Picloram Pillared clay Pillared montmorillonite Pyridinic nitrogen Raw clay Ssbauer spectroscopies Surface area Wyoming ,USA XRD Adsorption Clay minerals Fourier transform infrared spectroscopy Ionic strength Iron compounds Iron oxides Pollution Pyridine Spheres Weed control Herbicides adsorption aqueous solution herbicide iron oxide montmorillonite pH phase equilibrium pillared clay remediation Brown, José Luis Marco Adsorption of picloram herbicide on iron oxide pillared montmorillonite |
| topic_facet |
Herbicides Montmorillonite Picloram Pillared clay Adsorbent materials Fe oxide Freundlich models FTIR Inner sphere complexes Interlayer spaces Iron centers Langmuirs Picloram Pillared clay Pillared montmorillonite Pyridinic nitrogen Raw clay Ssbauer spectroscopies Surface area Wyoming ,USA XRD Adsorption Clay minerals Fourier transform infrared spectroscopy Ionic strength Iron compounds Iron oxides Pollution Pyridine Spheres Weed control Herbicides adsorption aqueous solution herbicide iron oxide montmorillonite pH phase equilibrium pillared clay remediation |
| description |
The adsorption of picloram on Fe Oxide Pillared Clays (PILC) as a possible basis for the development of adsorbent materials for the remediation of polluted environments was studied. To this end, after characterizing PILC obtained from raw clay from Wyoming, USA by XRD, elemental analysis, Mössbauer spectroscopy, DTA, TGA and N 2 adsorption (BET), the picloram adsorption was studied at constant pH and ionic strength after 48h equilibration with an aqueous solution of PCM. PCM adsorbed samples were characterized by SEM, zeta-potential vs pH functions, FTIR and TGA-DTA and the adsorption was modellated using Langmuir and Freundlich models. The results reveal that the surface area and interlayer space of PILC are bigger than those of raw montmorillonite. An analysis of the adsorption isotherms of picloram on the PILC showed that picloram adsorption increases with decreasing pH. The adsorption of PCM on PILC was 150 times higher than that found for raw montmorillonite under similar conditions. The zeta-potential vs pH functions shape and FTIR indicated that PCM coordinates the surface iron centers throughout pyridinic nitrogen atom forming inner-sphere complexes. The much greater PCM adsorption on PILC turns the process into an excellent candidate to be used for dosing or remediation of pesticides. © 2012 Elsevier B.V. |
| author |
Brown, José Luis Marco |
| author_facet |
Brown, José Luis Marco |
| author_sort |
Brown, José Luis Marco |
| title |
Adsorption of picloram herbicide on iron oxide pillared montmorillonite |
| title_short |
Adsorption of picloram herbicide on iron oxide pillared montmorillonite |
| title_full |
Adsorption of picloram herbicide on iron oxide pillared montmorillonite |
| title_fullStr |
Adsorption of picloram herbicide on iron oxide pillared montmorillonite |
| title_full_unstemmed |
Adsorption of picloram herbicide on iron oxide pillared montmorillonite |
| title_sort |
adsorption of picloram herbicide on iron oxide pillared montmorillonite |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01691317_v58_n_p25_MarcoBrown http://hdl.handle.net/20.500.12110/paper_01691317_v58_n_p25_MarcoBrown |
| work_keys_str_mv |
AT brownjoseluismarco adsorptionofpicloramherbicideonironoxidepillaredmontmorillonite |
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1768545596466003968 |