Transport Behavior of Engineered Nanosized Photocatalytic Materials in Water

Abstract

Engineered nanoparticles (ENPs) possess unique properties and are employed in many sectors, and thus their release into environment remains. The potential risks of ENPs have been confirmed by an increasing number of studies that necessitate a better knowledge to the fate and transport of ENPs. One important application of ENP is photocatalysis for production of H2as energy and pollutant decomposition. Engineered photocatalytic nanoparticles (PCNPs) can also easily enter the environment with the rapid increase in its manufacture and use. This review focuses on the transport of PCNPs in water by addressing the important factors that determine the transport of PCNPs, such as particle size, pH value, ionic strength (IS), ionic valence, and organic matter. The transport of PCNPs in natural water systems and wastewater systems is also presented with an attempt to provide more abundant information. In addition, the state of the art of the detection technologies of PCNPs has been covered.

Dominating Role of Ionic Strength in the Sedimentation of Nano‐TiO2 in Aquatic Environments

“…A set of designed orthogonal experiment [L 27 (3 13 )] with twenty-seven sedimentation tests was conducted. The experimental design consisted of three independent factors and their interactions.…”

“…Environmental behavior, including dispersion, transportation, aggregation, and sedimentation, of n-TiO 2 has been considerably investigated [13]. Most studies focus on determining the effect of pH [14,15], ionic strength (IS) [16,17], and natural organic matter (NOM) content [18][19][20] on the sedimentation behavior of n-TiO 2 .…”