Inorganic–organic hybrids based on sepiolite as efficient adsorbents of caffeine and glyphosate pollutants
Fecha
2020Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Identificador del proyecto
MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2016-78863-C2-R
Impacto
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10.1016/j.apsadv.2020.100025
Resumen
Sepiolite clay mineral was functionalized with (3-chloropropyl)triethoxysilane (ClPTES) or 3-[tri(ethoxy/methoxy)silyl] propylurea (TEMSPU) alkoxides and tested as adsorbent for herbicide glyphosate and also of caffeine, two pollutants with very different chemical composition. The materials obtained were characterized by X-ray diffractometry, infrared spectroscopy, thermal analysis, scanning elec ...
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Sepiolite clay mineral was functionalized with (3-chloropropyl)triethoxysilane (ClPTES) or 3-[tri(ethoxy/methoxy)silyl] propylurea (TEMSPU) alkoxides and tested as adsorbent for herbicide glyphosate and also of caffeine, two pollutants with very different chemical composition. The materials obtained were characterized by X-ray diffractometry, infrared spectroscopy, thermal analysis, scanning electron microscopy and nitrogen adsorption at −196 °C, and submitted to toxicity and desorption tests. Silane functional groups blocked sepiolite active positions, and adsorption occurred within the zeolitic channels and on the surface of the functionalized solids. Caffeine and glyphosate effectively interacted with urea groups from grafted alkoxide, which could lower the mobility of the adsorbed contaminants. Glyphosate adsorbed on functionalized sepiolite derivatives showed low toxicity. [--]
Materias
Caffeine,
Clay mineral,
Glyphosate,
Herbicide,
Organically modified sepiolite,
Sepiolite
Editor
Elsevier
Publicado en
Applied Surface Science Advances, 1
Departamento
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute for Advanced Materials and Mathematics - INAMAT2
Versión del editor
Entidades Financiadoras
The authors thank a Cooperation Grant jointly financed by Universidad de Salamanca (Spain) and FAPESP (Brazil), reference 2016/50322-2. The Spanish group acknowledges the support from MINECO and ERDF (MAT2016-78863-C2-R), and AG also thanks Santander Bank for funding via the Research Intensification Program. Brazilian group acknowledges the support from research funding agencies Fundaçao de Amparo à Pesquisa do Estado de São Paulo, FAPESP (2013/19523-3, 2018/26569-3 and 2017/15482-1), and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES-PRINT747059P) and Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq (311767/2015-0 and 303135/2018-2). The equipment of Brazilian group has been financed by FAPESP (1998/11022-3, 2005/00720-7, 2011/03335-8, 2012/11673-3 and 2016/01501-1).