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Application of olive pomace extract in biogenic synthesis of selenium nanoparticles

The application of olive pomace extract (OPE) was investigated for biogenic synthesis of selenium nanoparticles (SeNPs). The OPE was used at different amounts ranging from 0.3 % to 0.6 %. Obtained SeNPs were characterised in terms of size distribution by dynamic light scattering (DLS), surface charge as measured by  potential, antioxidant activity as determined by ORAC and TEAC method, and reductive capacity using Folin- Ciocalteu method. Characteristics of biogenically produced SeNPs were compared to those obtained by standard chemical synthesis using polyvinylpyrrolidone (PVP) as coating agent. The application of 0.3 % OPE resulted in stable SeNPs dispersion of 100 nm particle size similar to PVP- coated SeNPs, while the increase in OPE amount in reaction mixture increased the mean particle size and led to polydisperse system. Surface charge of biologically synthesized SeNPs was more negative (-34 mV) compared to PVP-SeNPs (-17.2 mV) indicating better stability. Antioxidant and reductive efficacy of biologenically synthesized SeNPs was significantly higher than for SeNPs prepared by chemical synthesis. Obtained results demonstrated advantages of using natural polyphenol rich plant extracts in preparation of stable SeNPs in terms of development of green synthesis processes and improved functional properties of obtained nanomaterials.

olive pomace extract ; selenium nanoparticles ; biogenic synthesis ; antioxidant activity

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