INVESTIGADORES
DELL'ERBA ignacio Esteban
artículos
Título:
Hybrid mineral@silsesquioxane particles for water remediation: synthesis, characterization and application as adsorbent of As(V) and other water pollutants
Autor/es:
C.V. WAIMAN; I. E. DELL'ERBA; C. A. CHESTA; M. L. GÓMEZ
Revista:
JOURNAL OF MATERIALS SCIENCE
Editorial:
SPRINGER
Referencias:
Año: 2018 vol. 53 p. 12781 - 12794
ISSN:
0022-2461
Resumen:
Mineral-coated silsesquioxane particles of approximately 600 nm diameter weresynthesized from the hydrolytic co-condensation of N-[3-trimethoxysilyl]-propyl]ethylenediamine (DAS) and tetraethyl orthosilicate (TEOS). The hybridparticles involve nanocomposites with a mineral core (montmorillonite?MMT?or goethite?Gt?nanoparticles) and coated with a silsesquioxane shellcontaining hydroxyl and amine groups. These particles were specially designed(exposing amino groups) to be highly efficient for the removal of As(V) and toenhance the adsorption properties of the minerals employed in this work. Theywere characterized by infrared spectroscopy, X-ray diffraction, scanning electron microscopy, zeta potential, dynamic light scattering and thermogravimetric techniques such as dynamic scanning calorimetry and thermogravimetric analysis. The characteristics found in the composite particles compared with pure organosilane DAS/TEOS or with the unmodified minerals proved the effectiveness of the silanization process. As result, hybrid nanocompositematerials were obtained, denoting versatility in their adsorption properties ofdifferent types of pollutants. Moreover, all synthesized particles showed a higharsenic retention capacity; experimental results demonstrated that superficialmodification of the minerals is the preponderant factor that determines theiradsorbent properties, favoring the versatility of these materials making themsuitable for the removal of pollutants of diverse charge and nature.