2020
DOI: 10.3390/ma13183999
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Zeta Potentials of Magnetite Particles and Alloy 690 Surfaces in Alkaline Solutions

Abstract: Magnetite particles deposited on the secondary side of a steam generator (SG) can degrade the integrity and performance of pressurized water reactors. Therefore, it is necessary to produce the data of fundamental interfacial electrokinetic properties of magnetite particles and SG tube materials. This study investigated the zeta potentials of magnetite nanoparticles and Alloy 690 surfaces, which were dependent on the pH value, pH agent, and the presence of NaCl. The zeta potentials of the magnetite nanoparticle… Show more

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Cited by 12 publications
(7 citation statements)
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References 16 publications
(24 reference statements)
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“…Specifically, at values close to 0 (−25 mV to 25 mV), nanoparticles have a tendency to form aggregates due to attractive forces present at the surface. Therefore, zeta potential values lower than −25 mV and higher than 25 mV are associated with stable dispersions [ 59 , 60 , 61 ]. As it can be seen in Figure 4 , the lowest zeta potential values were recorded for samples Fe 3 O 4 @SiO 2 @thyme_CP and Fe 3 O 4 @SiO 2 @rosemary_CP, which had the smallest hydrodynamic diameters.…”
Section: Resultsmentioning
confidence: 99%
“…Specifically, at values close to 0 (−25 mV to 25 mV), nanoparticles have a tendency to form aggregates due to attractive forces present at the surface. Therefore, zeta potential values lower than −25 mV and higher than 25 mV are associated with stable dispersions [ 59 , 60 , 61 ]. As it can be seen in Figure 4 , the lowest zeta potential values were recorded for samples Fe 3 O 4 @SiO 2 @thyme_CP and Fe 3 O 4 @SiO 2 @rosemary_CP, which had the smallest hydrodynamic diameters.…”
Section: Resultsmentioning
confidence: 99%
“…All polydispersity index values are in the range of 0.25–0.6, which are values generally accepted for nanoparticles [ 42 ]. Since the zeta potential reflects the overall nanoparticle surface charge, it is generally regarded as a reference for the stability of the nanoparticle dispersions, i.e., values between -25 and 25 mV indicate an increased tendency of the nanoparticles to form aggregates [ 11 , 43 , 44 , 45 , 46 ]. Therefore, it can be observed that the Ce 0.5 Fe 2.5 O 4 sample is the most stable, with a zeta potential value of +25 mV, which confirms the previous observations regarding the higher stability of the cerium-containing samples.…”
Section: Resultsmentioning
confidence: 99%
“…At pH >8.4, the surface of γ-AlOOH will carry a net negative charge. As the pH increases, the electronegativity of the γ-AlOOH surface becomes more negative, indicating that γ-AlOOH has a greater repulsion of the uranyl negative ions in the solution. , …”
Section: Resultsmentioning
confidence: 99%