Comparison of three labeled silica nanoparticles used as tracers in transport experiments in porous media. Part I: Syntheses and characterizations

Anomalous transport of colloids in heterogeneous porous media: A multi-scale statistical theory

“…Fluorescent colloidal particles (Fig. 1A) were prepared using a sol-gel methodology [46]: tetraethyl orthosilicate, (3-aminopropyl) triethoxysilane and Fluorescein isothiocyanate isomer (FITC) were mixed together in ethanol, with a later addition of 32 wt% ammonium hydroxide solution and milliQ H 2 O (MQ) to produce the fluorescent silica particles. These particles underwent a functionalisation reaction with 3-(Trihydroxysilyl)propyl methylphosphonate (THPMP, CAS: 84962-98-1) [47,48].…”

Combining microscopy with spectroscopic and chemical methods for tracing the origin of atmospheric fallouts from mining sites

“…Following the procedure described in Simonin et al, [33] and Vitorge et al, [34][35][36] a minimum of 100 particles and a maximum of 300 particles (about 10 representative particles were specifically analyzed for speciation) were analyzed for each sample of dust and fallout, in order to establish a particle morphology fingerprint for all of the studied site locations.…”

Low mobility of CuO and TiO2 nanoparticles in agricultural soils of contrasting texture and organic matter content

“…Dissolved OM is known to promote NPs dispersion and potentially their mobility in simple porous media (Ben-Moshe, Dror and Berkowitz 2010;Thio, Zhou and Keller 2011;Simonin et al 2015), while clay particles can destabilize positively and negatively charged NPs and thus decrease their mobility (Zhou et al 2012). In addition, these processes are strongly influenced by the chemistry of soil solution, such as pH, ionic strength and electrolytes such as inorganic ions (Wang et al 2012;Cornelis et al 2014;Vitorge et al 2014). Fang et al (2011) demonstrated that TiO2-NPs could act as a metal carrier and facilitate for instance the mobilization of metals, such as copper, in soil.…”