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Silica nanoparticle separation from water by aggregation with AlCl₃

Liu, Yanping and Tourbin, Mallorie and Lachaize, Sébastien and Guiraud, Pascal Silica nanoparticle separation from water by aggregation with AlCl₃. (2011) Industrial & Engineering Chemistry Research, 51 (4). 1853-1863. ISSN 0888-5885

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Official URL: http://dx.doi.org/10.1021/ie200672t


Nanotechnology that is vigorously developed nowadays will inevitably let nanoparticles into water resources. Since these ultrasmall particles may have potential risks for human and animals, it is reasonable to consider urgently how to manage these polluted waters. The direct separation would be difficult due to their small size and high surface area, so AlCl₃ is added to modify surface physicochemical properities of nanosilica in order to produce aggregates. Early stages and long time equilibriumof nanosilica aggregation are explored. In the kinetics study (early stage), the influences of particle concentrations and particle sizes are studied and compared. The aggregation results at long time equilibrium are further investigated, which shows the charge neutralization effect could be overcome by other mechanisms. More than 99% of the turbidity can be removed from aggregation of nanosilica by AlCl₃ after sedimentation.

Item Type:Article
HAL Id:hal-01268413
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:04 Nov 2013 14:29

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