@misc{10481/87846,
year = {2018},
url = {https://hdl.handle.net/10481/87846},
abstract = {In this work, the toxicity of hydrophilic fumed silica microand
nanoparticles of various sizes (7 nm, 12 nm, and 50 μm) was evaluated
using the luminescent bacteria Vibrio fischeri. In addition, the toxicity
of an anionic surfactant solution (ether carboxylic acid), a nonionic
surfactant solution (alkyl polyglucoside), and a binary (1:1) mixture of
these solutions all containing these silica particles was evaluated.
Furthermore, this work discusses the adsorption of surfactants onto
particle surfaces and evaluates the effects of silica particles on the
surface tension and critical micellar concentration (CMC) of these
anionic and nonionic surfactants. It was determined that silica particles
can be considered as non-toxic and that silica particles reduce the
toxicity of surfactant solutions. Nevertheless, the toxicity reduction
depends on the ionic character of the surfactants. Differences can be
explained by the different adsorption behavior of surfactants onto the
particle surface, which is weaker for nonionic surfactants than for
anionic surfactants. Regarding the effects on surface tension, it was
found that silica particles increased the surface activity of anionic
surfactants and considerably reduced their CMC, whereas in the case of
nonionic surfactants, the effects were reversed.},
publisher = {Elsevier},
keywords = {Silica nanoparticles},
keywords = {Toxicity},
keywords = {Nonionic surfactants},
title = {Silica micro-and nanoparticles reduce the toxicity of surfactant solutions},
doi = {10.1016/j.jhazmat.2018.04.040},
author = {Ríos Ruiz, Francisco and Fernández Arteaga, Alejandro and Fernández Serrano, Mercedes and Jurado Alameda, Encarnación and Lechuga Villena, Manuela María},
}