Influence of organic molecules on the aggregation of TiO₂ nanoparticles in acidic conditions.

ABSTRACT: Engineered nanoparticles released into the environment may interact with natural organic matter (NOM). Surface complexation affects the surface potential, which in turn may lead to aggregation of the particles. Aggregation of synthetic TiO₂ (anatase) nanoparticles in aqueous suspension was investigated at pH 2.8 as a function of time in the presence of various organic molecules and Suwannee River fulvic acid (SRFA), using dynamic light scattering (DLS) and high-resolution transmission electron microscopy (TEM). Results showed that the average hydrodynamic diameter and ζ-potential were dependent on both concentration and molecular structure of the organic molecule. Results were also compared with those of quantitative batch adsorption experiments. Further, a time study of the agg

SUBMITTER: Danielsson K 

PROVIDER: S-EPMC5380707 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature