Adsorption and characterization of MCPA on DDTMA- and raw-montmorillonite: surface sites involved

The 4-chloro-2-methylphenoxy acid (MCPA) is an herbicide widely used in agriculture, which generates a great concern about contamination of surface water and serious consequences for human health and the environment. In this work, the adsorption of MCPA on an Argentine montmorillonite (MMT) and its...

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Autores principales: Santiago, Cintia C., Fernández, Mariela Alejandra, Torres Sánchez, Rosa María
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Ciencias Naturales
Química
Adsorption
Characterization
Outer and inner surface sites
MCPA
Organomo-ntmorillonite
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/102878
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-102878
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Química
Adsorption
Characterization
Outer and inner surface sites
MCPA
Organomo-ntmorillonite
spellingShingle Ciencias Naturales
Química
Adsorption
Characterization
Outer and inner surface sites
MCPA
Organomo-ntmorillonite
Santiago, Cintia C.
Fernández, Mariela Alejandra
Torres Sánchez, Rosa María
Adsorption and characterization of MCPA on DDTMA- and raw-montmorillonite: surface sites involved
topic_facet Ciencias Naturales
Química
Adsorption
Characterization
Outer and inner surface sites
MCPA
Organomo-ntmorillonite
description The 4-chloro-2-methylphenoxy acid (MCPA) is an herbicide widely used in agriculture, which generates a great concern about contamination of surface water and serious consequences for human health and the environment. In this work, the adsorption of MCPA on an Argentine montmorillonite (MMT) and its organo-montmorillonite product (OMMT) with different dodecyl trimethyl ammonium loading was investigated. MCPA adsorption on OMMT increases at least 3 times, with respect to the amount determined for MMT. X-ray diffraction and zeta potential analyses indicated the inner (interlayer) and outer surface participate as adsorption sites. Changes in surface electric charge and also interlayer expansion suggest that dimethyl amine (MCPA counterion) was also surface-adsorbed. The larger aggregates of OMMT, without and with MCPA, obtained compared to those of MMT samples, generate an improvement in the coagulation efficiency. This property, particularly after MCPA retention, allows an easier separation of the solids from the solution and enables a simple technological process application.
format Articulo
Articulo
author Santiago, Cintia C.
Fernández, Mariela Alejandra
Torres Sánchez, Rosa María
author_facet Santiago, Cintia C.
Fernández, Mariela Alejandra
Torres Sánchez, Rosa María
author_sort Santiago, Cintia C.
title Adsorption and characterization of MCPA on DDTMA- and raw-montmorillonite: surface sites involved
title_short Adsorption and characterization of MCPA on DDTMA- and raw-montmorillonite: surface sites involved
title_full Adsorption and characterization of MCPA on DDTMA- and raw-montmorillonite: surface sites involved
title_fullStr Adsorption and characterization of MCPA on DDTMA- and raw-montmorillonite: surface sites involved
title_full_unstemmed Adsorption and characterization of MCPA on DDTMA- and raw-montmorillonite: surface sites involved
title_sort adsorption and characterization of mcpa on ddtma- and raw-montmorillonite: surface sites involved
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/102878
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