Modified Nanobentonites for Water Remediation

BRACCO, ESTEFANÍA BELÉN; BUTLER, MATÍAS; CANDAL, ROBERTO JORGE; CARNELLI, PATRICIO FRANCISCO FLORENCIO; GUZ, LUCAS; IVANIC, FEDERICO; LÓPEZ LOVEIRA, ELSA; MARCO BROWN, JOSÉ LUIS

Industrial Applications of Nanoparticles: A Prospective Overview

CRC Press

Lugar: Boca Raton; Año: 2023; p. 153 - 173

Bentonite is a natural clay, which consists mainly of montmorillonite (MMT), a phyllosilicate (sheet silicate minerals formed by parallel layers of silicate tetrahedra) composed of alternating tetrahedral and octahedral layers in a 2:1 ratio. MMT is a nanoclay with a layer thickness around 1 nm; the lattice has an excess negative charge, which is balanced in the interlayer space by hydrated inorganic cations, such as Na(I), Ca(II), etc. Therefore, MMT has a high Cation Exchange Capacity (CEC) and a large surface area, leading to high adsorption capacities for pollutants.