Aggregation and stability of Fe2O3

Influence of humic acid concentration, Fe2O3 concentration and pH

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The scenario of released nanoparticles from consumer product into the environment especially natural waters are increased concern nowadays. Assessing their aggregation and stability under environmental conditions are important to determining their fate and behavior in natural waters. The aggregation behavior of Fe2O3 nanoparticles (NPs) was investigated at variable concentration of humic acid, Fe2O3 NPs concentration and pH variation in solution using dynamic light scattering to measure their z-average hydrodynamic diameter and zeta potential value. The stability are then evaluated by assessing their aggregation and disaggregation. Increasing humic acid concentration induced the disaggregation of Fe2O3 NPs. At a lower concentrations of Fe2O3 (< 30 mg/L), aggregate formed and disaggregation take place with increasing Fe2O3 concentration (50, 100, 150, 200 mg/L). The maximum aggregation was found in pH 4 at a constant concentration of humic acid of 100 mg/L and concentration of Fe2O3 (100 mg/L). High pH (>5) of solution induced disaggregation of suspensions and make it stable in the solution. TEM imaging have confirmed that Fe2O3 NPs aggregate and disaggregate in the presence of humic acid. Our study result shows that aggregation and stability of Fe2O3 NPs were depends on concentration of humic acid, concentration of NPs itself and the pH of the solutions.

Original languageEnglish
Title of host publication4th International Conference on Fundamental and Applied Sciences, ICFAS 2016
PublisherAmerican Institute of Physics Inc.
Volume1787
ISBN (Electronic)9780735414518
DOIs
Publication statusPublished - 28 Nov 2016
Event4th International Conference on Fundamental and Applied Sciences, ICFAS 2016 - Kuala Lumpur, Malaysia
Duration: 15 Aug 201617 Aug 2016

Other

Other4th International Conference on Fundamental and Applied Sciences, ICFAS 2016
CountryMalaysia
CityKuala Lumpur
Period15/8/1617/8/16

Fingerprint

nanoparticles
acids
water
low concentrations
light scattering
hydrodynamics
transmission electron microscopy
products

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Ahmad, N. S., Radiman, S., & Wan Yaacob, W. Z. (2016). Aggregation and stability of Fe2O3: Influence of humic acid concentration, Fe2O3 concentration and pH. In 4th International Conference on Fundamental and Applied Sciences, ICFAS 2016 (Vol. 1787). [050024] American Institute of Physics Inc.. https://doi.org/10.1063/1.4968122

Aggregation and stability of Fe2O3 : Influence of humic acid concentration, Fe2O3 concentration and pH. / Ahmad, Nur Suraya; Radiman, Shahidan; Wan Yaacob, Wan Zuhairi.

4th International Conference on Fundamental and Applied Sciences, ICFAS 2016. Vol. 1787 American Institute of Physics Inc., 2016. 050024.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ahmad, NS, Radiman, S & Wan Yaacob, WZ 2016, Aggregation and stability of Fe2O3: Influence of humic acid concentration, Fe2O3 concentration and pH. in 4th International Conference on Fundamental and Applied Sciences, ICFAS 2016. vol. 1787, 050024, American Institute of Physics Inc., 4th International Conference on Fundamental and Applied Sciences, ICFAS 2016, Kuala Lumpur, Malaysia, 15/8/16. https://doi.org/10.1063/1.4968122
Ahmad NS, Radiman S, Wan Yaacob WZ. Aggregation and stability of Fe2O3: Influence of humic acid concentration, Fe2O3 concentration and pH. In 4th International Conference on Fundamental and Applied Sciences, ICFAS 2016. Vol. 1787. American Institute of Physics Inc. 2016. 050024 https://doi.org/10.1063/1.4968122
Ahmad, Nur Suraya ; Radiman, Shahidan ; Wan Yaacob, Wan Zuhairi. / Aggregation and stability of Fe2O3 : Influence of humic acid concentration, Fe2O3 concentration and pH. 4th International Conference on Fundamental and Applied Sciences, ICFAS 2016. Vol. 1787 American Institute of Physics Inc., 2016.
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