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Stability of volcanic nanoparticles using combined capillary zone electrophoresis and laser diffraction

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Abstract

Nanoparticles are a potential source and carrier of nutrients and pollutants in aquatic ecosystems, yet the stability of nanoparticles in environmental conditions is poorly known. Here, we studied volcanic ash nanoparticles by simultaneous application of capillary zone electrophoresis and laser diffraction for determination of size, zeta-potential and long-term aggregation stability. Results show that volcanic ash nanoparticles remained stable for at least 28 days. Stability increases from pH 5.5 to 8.5. Zeta-potentials are − 56 mV at pH 7.2 and − 64 mV at pH 8.5. Findings imply that volcanic ash nanoparticles have a high potential for long-range transport of nutrient and toxic elements in surface waters. Moreover, the developed method allows direct conversion of electropherograms into particle size distributions.

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Acknowledgements

This work was supported by the Russian Foundation for Basic Research, Project No. 20-03-00274 (characterization of morphology of nanoscale particles). The equipment used in NUST “MISIS” for laser diffraction measurements was purchased and maintained with the support of the Ministry of Education and Science of the Russian Federation (Program of Increasing Competitiveness of NUST “MISIS,” Projects No. К1-2014-026, No. К2-2017-088). The authors are also grateful to Prof. Petr S. Fedotov (Vernadsky Institute of Geochemistry and Analytical Chemistry, Moscow, Russia) for editing the manuscript. The study corresponds to the research topic No. 0116-2019-0010 of Vernadsky Institute of Geochemistry and Analytical Chemistry.

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Correspondence to Mikhail S. Ermolin.

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Ermolin, M.S., Dzherayan, T.G. & Vanifatova, N.G. Stability of volcanic nanoparticles using combined capillary zone electrophoresis and laser diffraction. Environ Chem Lett 19, 751–762 (2021). https://doi.org/10.1007/s10311-020-01087-6

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  • DOI: https://doi.org/10.1007/s10311-020-01087-6

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