The effect of inorganic ions on the aggregation kinetics of lab-made

Due to its pH zpc, in the neutral pH generally in the natural environment, the quick aggregation and sedimentation of lab-made stable TiO 2 NPs at pH 7 ... Effects of material properties on sedimentation and aggregation of titanium dioxide nanoparticles of anatase and rutile in the aqueous phase. J Colloid Interface Sci, 363 (2011), pp. 84-91.

Aggregation of Titanium Dioxide Nanoparticles: Role of a …

This profile shows sediment and adsorption characteristics of all three sedimentation types, where "type 1" sedimentation is observed in the 0~30 min area, "type 2" sedimentation is observed in ...

Effects of fulvic acid on aggregation, sedimentation, and …

Aggregation and sedimentation of Fe 3 O 4 NPs are influenced by adsorption of FA in aqueous suspensions. At lesser concentrations of FA, suspension of Fe 3 O 4 NPs was less due to neutralization of charges between FA and Fe 3 O 4 NPs, ... Erhayem M, Sohn M (2014b) Effect of humic acid source on humic acid adsorption onto …

Effects of material properties on sedimentation and aggregation …

This study investigated the sedimentation and aggregation kinetics of titanium dioxide (TiO 2) nanoparticles with varying material properties (i.e., crystallinity, morphology, and chemical composition).Used in the study were various types of commercially available TiO 2 nanoparticles: three spherical anatase (nominal diameters …

Modeling aggregation and sedimentation of nanoparticles …

Meanwhile, in the presence of organic matter, rhodamine B, methylene orange, and humic acid did not significantly affect the formation of TiO2 sedimentation.Keywords: titanium dioxide ...

Significance of nanoparticles aggregation on the dynamics …

The significance of nanoparticle aggregation, Lorentz and Coriolis forces on the dynamics of spinning silver nanofluid flow past a continuously stretched surface is prime significance in modern ...

Adsorption, aggregation and sedimentation of titanium …

Here, the adsorption, aggregation and sedimentation of TiO 2 nanoparticles (TiO 2 NPs) and nanotubes (TiO 2 NTs) were investigated in the …

[PDF] Aggregation of titanium dioxide nanoparticles: role …

FCS Technique A laser light is focussed into a sample of interest using confocal optics. In this manner, an open, illuminated volume element with dimensions of ~0.5–1.0 μm 3 (confocal volume) is created. At any point in time, the confocal volume is occupied by one or only a few fluorescent molecules. In the absence of chemical …

Review of analytical studies on TiO 2 nanoparticles and …

Titanium dioxide (TiO 2 ) nanoparticles (NPs) have been widely used in industrial and consumer products. ... This review provides a summary of recent analytical studies of TiO 2 NPs and their aggregation, coagulation, flocculation, sedimentation, stabilization under a wide range of conditions and processes. Much attention is paid on sample ...

Sedimentation of Titanium Dioxide Suspension under the …

Sedimentation of Titanium Dioxide Suspension under the Action of Magnetic Flocculants. Published: 18 April 2023. Volume 85, pages 72–79, ( 2023 ) Cite …

Influence of Ionic Strength, pH, and Cation Valence on Aggregation …

The extensive use of titanium dioxide nanoparticles (nano-TiO2) in many consumer products has raised concerns about possible risks to the environment. The magnitude of the threat may depend on whether nano-TiO2 remains dispersed in the environment, or forms much larger-sized aggregates or clusters. Currently, limited information is available on …

Comparison on aggregation and sedimentation of titanium …

@article{Liu2013ComparisonOA, title={Comparison on aggregation and sedimentation of titanium dioxide, titanate nanotubes and titanate nanotubes-TiO2: Influence of pH, ionic strength and natural organic matter}, author={Wen Liu and Weiling Sun and Alistair G. L. Borthwick and Jinren Ni}, journal={Colloids and Surfaces A: Physicochemical and ...

Agglomeration behaviour of titanium dioxide nanoparticles …

Titanium dioxide nanoparticles (TiO 2 NPs) are currently one of the most prolifically used nanomaterials, resulting in an increasing likelihood of release to the environment.This is of concern as the potential toxicity of TiO 2 NPs has been investigated in several recent studies. Research into their fate and behaviour once entering the …

Comparison on aggregation and sedimentation of titanium …

Aggregation and sedimentation are of significant importance to the safe applications of nanomaterials.In this study, aggregation and sedimentation of three homologous nanomaterials, titanium dioxide (TiO 2), titanate nanotubes (TNs), and titanate nanotubes–TiO 2 (TNs–TiO 2) were systematically studied under various aqueous …

Effects of material properties on sedimentation and aggregation …

DOI: 10.1016/j.jcis.2011.06.085 Corpus ID: 27997503; Effects of material properties on sedimentation and aggregation of titanium dioxide nanoparticles of anatase and rutile in the aqueous phase.

Roles of pH, cation valence, and ionic strength in the stability …

Aggregation and sedimentation experiment. The influence of pH on the ZnO NPs in the process of aggregation and sedimentation was tested at constant IS (0.01 M, NaCl). The effect of ionic species and strength on ZnO NPs stability was done at pH = 7. The IS of the ZnO NPs stock solution was adjusted with 1 mol/L NaCl, KCl, CaCl 2, and …

Effects of material properties on sedimentation and aggregation …

This study investigated the sedimentation and aggregation kinetics of titanium dioxide (TiO(2)) nanoparticles with varying material properties (i.e., crystallinity, morphology, and chemical composition). Used in the study were various types of commercially available TiO(2) nanoparticles: three spher …

Influence of ionic strength, pH, and cation valence on aggregation …

Initial measurements of the morphology and rate of formation of nano-TiO2 aggregates in aqueous suspensions as a function of ionic strength and of the nature of the electrolyte in a moderately acid to circumneutral pH range typical of soil and surface water conditions indicate that divalent cations may enhance aggregation of nano, TiO2 in …

Heteroaggregation of Graphene Oxide with Nanometer- and …

Heteroaggregation of graphene oxide (GO) with nanometer- and micrometer-sized hematite colloids, which are naturally present in aquatic systems, is investigated in this study. The heteroaggregation rates between GO and hematite nanoparticles (HemNPs) were quantified by dynamic light scattering, while the heteroaggregation between GO and …

Stability of Aqueous Dispersions of Titanium Dioxide …

1 The Summer Undergraduate Research Fellowship (SURF) Symposium 7 August 2014 Purdue University, West Lafayette, Indiana, USA Stability of Aqueous Dispersions of Titanium Dioxide Against Sedimentation and Aggregation Guanrong Bai, Xilan Zhu, Yung-Jih Yang, Elias I. Franses, David S. Corti School of Chemical Engineering, Purdue …

Effectively inhibiting particles aggregation and sedimentation …

The experimental results show that the aggregation and sedimentation of TiO2 particles are effectively suppressed when a rod electrode is inserted into the TiO2-H2O suspensions due to the increase ...

Effects of material properties on sedimentation and …

Effects of material properties on sedimentation and aggregation of titanium dioxide nanoparticles of anatase and rutile in the aqueous phase. | Semantic Scholar. …

Adsorption, aggregation and sedimentation of titanium …

Environmental behavior, bioavailability and risks posed by TiO2, nanomaterials (TiO2 NMs) in surface waters are affected by morphologies of the particles and geochemistry, including pH, inorganic and organic matter. Here, the adsorption, aggregation and sedimentation of TiO2 nanoparticles (TiO2 NPs) and nanotubes (TiO2 NTs) were investigated in the …

Review of analytical studies on TiO2 nanoparticles and …

Titanium dioxide (TiO 2) nanoparticles (NPs) have been widely used in industrial ... The environmental behaviors of the released ENMs e.g. TiO 2 NPs including dispersion, aggregation, transportation, sedimentation, and photocatalytic redox reaction, depend on the properties of TiO 2 NPs and the complexity of the receiving systems …

Modeling aggregation and sedimentation of nanoparticles …

The aggregation of nanoparticles is modeled based on the experimental results. •. Hetero- and homo-aggregations as well as sedimentation are incorporated in the model. •. The parameterized model reliably reproduces the experimental results. •. It is suitable for the application to field situations.

Effects of material properties on sedimentation and …

This study investigated the sedimentation and aggregation kinetics of titanium dioxide (TiO (2)) nanoparticles with varying material properties (i.e., …

Agglomeration and sedimentation of titanium dioxide nanoparticles …

The sedimentation profiles of Al 2 O 3 and TiO 2 nanofluids with regard to the sedimentation height ratio was obtained by plotting ln h o h t against different time intervals, t for different ...

Stability, aggregation, and sedimentation behaviors of …

The aggregation and sedimentation performance of NMOPs were affected by not only pH but also ionic strength (IS) and species. The aggregation rates of NMOPs increased with the increase of IS (0–10 mM), and the maximum aggregation rate of CeO 2 NPs was 470.1 nm/min (pH = 7 and CaCl 2 = 10 mM).

Science of the Total Environment

Adsorption, aggregation and sedimentation of titanium dioxide nanoparticles and nanotubes in the presence of different sources of humic acids Tianhui Zhaoa,b, Mengyuan Fangb,c, Zhi Tangb,⁎, Xiaoli Zhaob,FengchangWub, John P. Giesyd,e a College of Water Sciences, Beijing Normal University, Beijing 100875, China b State Key Laboratory of …