Role of combinatorial environmental factors in the behavior and fate of ZnO nanoparticles in aqueous systems: A multiparametric analysis

Majedi, Seyed Mohammad; Kelly, Barry C.; Lee, Hian Kee

doi:10.1016/j.jhazmat.2013.11.015

Cited by 46 publications

(34 citation statements)

References 53 publications

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“…S3(B)), indicating the majority were in well dispersion in Milli-Q water. Much larger size of CuO NPs measured by DLS compared to the primary size (60-100 nm) and the TEM measurements (p < 0.05) is likely due to the formation of nano-CuO aggregates, and the diameter measured by DLS is a value that refers to how a particle moves within a liquid (called the hydrodynamic diameter) (Majedi et al 2014;Zhang et al 2012). Zeta potential was measured at various pH values as shown in Fig.…”

Section: Characterization Of Cuo Npsmentioning

confidence: 97%

Effect of alginate on the aggregation kinetics of copper oxide nanoparticles (CuO NPs): bridging interaction and hetero-aggregation induced by Ca2+

Miao

Wang

Hou

et al. 2016

Environ Sci Pollut Res

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The stability of CuO nanoparticles (NPs) is expected to play a key role in the environmental risk assessment of nanotoxicity in aquatic systems. In this study, the effect of alginate (model polysaccharides) on the stability of CuO NPs in various environmentally relevant ionic strength conditions was investigated by using time-resolved dynamic light scattering. Significant aggregation of CuO NPs was observed in the presence of both monovalent and divalent cations. The critical coagulation concentrations (CCC) were 54.5 and 2.9 mM for NaNO3 and Ca(NO3)2, respectively. The presence of alginate slowed nano-CuO aggregation rates over the entire NaNO3 concentration range due to the combined electrostatic and steric effect. High concentrations of Ca(2+) (>6 mM) resulted in stronger adsorption of alginate onto CuO NPs; however, enhanced aggregation of CuO NPs occurred simultaneously under the same conditions. Spectroscopic analysis revealed that the bridging interaction of alginate with Ca(2+) might be an important mechanism for the enhanced aggregation. Furthermore, significant coagulation of the alginate molecules was observed in solutions of high Ca(2+) concentrations, indicating a hetero-aggregation mechanism between the alginate-covered CuO NPs and the unabsorbed alginate. These results suggested a different aggregation mechanism of NPs might co-exist in aqueous systems enriched with natural organic matter, which should be taken into consideration in future studies. Graphical abstract Hetero-aggregation mechanism of CuO nanoparticles and alginate under high concentration of Ca(2.)

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Section: Characterization Of Cuo Npsmentioning

confidence: 97%

Effect of alginate on the aggregation kinetics of copper oxide nanoparticles (CuO NPs): bridging interaction and hetero-aggregation induced by Ca2+

Miao

Wang

Hou

et al. 2016

Environ Sci Pollut Res

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“…The state in which ENMs are present in the environment will depend on the solution conditions including pH, ionic strength, and dissolved organic matter which, in turn, affect the dispersion, stability, aggregation, and potential for ZnO to dissolve in a leachate matrix [30][31][32][33]. Particle size analyses based on the 100 mg/L ZnO ENM leachate samples indicated that the particle size of the nano powder ZnO in leachate varied between 402 and 665 nm for acidic conditions, 349-622 nm for basic conditions, and 468-857 nm for increased IS conditions, respectively.…”

Section: Resultsmentioning

confidence: 99%

Leaching of nano-ZnO in municipal solid waste

Sakallioglu

Bakirdoven

Temizel

et al. 2016

Journal of Hazardous Materials

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“…By contrast, the aggregation of ZnO nanoparticles was found to be induced by temperature (Majedi et al 2014). …”

Section: Influence Of Temperaturementioning

confidence: 99%

Comparative effects of macro-sized aluminum oxide and aluminum oxide nanoparticles on erythrocyte hemolysis: influence of cell source, temperature, and size

et al. 2015

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Al 2 O 3 is the most abundantly produced nanomaterial and has been used in diverse fields, including the medical, military and industrial sectors. As there are concerns about the health effects of nanoparticles, it is important to understand how they interact with cells, and specifically with red blood cells. The hemolysis induced by three commercial nano-sized aluminum oxide particles (nanopowder 13 nm, nanopowder <50 nm and nanowire 2-6 nm × 200-400 nm) was compared to aluminum oxide and has been studied on erythrocytes from humans, rats and rabbits, in order to elucidate the mechanism of action and the influence of size and shape on hemolytic behavior. The concentrations inducing 50% hemolysis (HC 50 ) were calculated for each compound studied.The most hemolytic aluminum oxide particles were of nanopowder 13, followed by nanowire and nanopowder 50. The addition of albumin to PBS induced a protective effect on hemolysis in all the nano-forms of Al 2 O 3 , but not on Al 2 O 3. The drop in HC 50 correlated to a decrease in nanomaterial size, which was induced by a reduction of aggregation Aluminum oxide nanoparticles are less hemolytic than other oxide nanoparticles, and behave differently depending on the size and shape of the nanoparticles. The hemolytic behavior of aluminum oxide nanoparticles differs from that of aluminum oxide.

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Role of combinatorial environmental factors in the behavior and fate of ZnO nanoparticles in aqueous systems: A multiparametric analysis

Cited by 46 publications

References 53 publications

Effect of alginate on the aggregation kinetics of copper oxide nanoparticles (CuO NPs): bridging interaction and hetero-aggregation induced by Ca2+

Effect of alginate on the aggregation kinetics of copper oxide nanoparticles (CuO NPs): bridging interaction and hetero-aggregation induced by Ca2+

Leaching of nano-ZnO in municipal solid waste

Comparative effects of macro-sized aluminum oxide and aluminum oxide nanoparticles on erythrocyte hemolysis: influence of cell source, temperature, and size

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