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Silver and gold nanoparticles biosynthesized by aqueous extract of burdock root, Arctium lappa as antimicrobial agent and catalyst for degradation of pollutants

Abstract

This study presents an efficient and facile method for biosynthesis of silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) using aqueous extract of burdock root (BR), A. lappa, and their applications. The nanoparticles were characterized by ultraviolet-visible spectrophotometry, X-ray diffraction, transmission electron microscopy, energy dispersive X-ray, thermogravimetry, and differential thermal analysis. AgNPs capped the BR extract (BR-AgNPs) possessed roughly spherical geometry with an average diameter of 21.3 nm while uneven geometry of AuNPs capped the BR extract (BR-AuNPs) showed multi shapes in average size of 24.7 nm. The BR-AgNPs strongly inhibited five tested microorganism strains. In particular, the nanoparticles showed excellent catalytic activity for the conversion of pollutants within wastewater. Pseudo-first-order rate constants for the degradation of 4-nitrophenol, methyl orange, and rhodamine B were respectively found 6.77 × 10−3, 3.70 × 10−3, and 6.07 × 10−3 s−1 for BR-AgNPs and 6.87 × 10−3, 6.07 × 10−3, and 7.07 × 10−3 s−1 for BR-AuNPs.

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Funding

This project was funded by Vietnam Academy of Science and Technology (VAST) (No. ĐLTE00.04/18-19).

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Correspondence to Thanh-Danh Nguyen.

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The authors declare that they have no conflict of interest.

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Responsible editor: Philippe Garrigues

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Nguyen, T.TN., Vo, TT., Nguyen, B.NH. et al. Silver and gold nanoparticles biosynthesized by aqueous extract of burdock root, Arctium lappa as antimicrobial agent and catalyst for degradation of pollutants. Environ Sci Pollut Res 25, 34247–34261 (2018). https://doi.org/10.1007/s11356-018-3322-2

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  • DOI: https://doi.org/10.1007/s11356-018-3322-2

Keywords

  • Nanoparticles
  • Degradation
  • Pollutants
  • Arctium lappa
  • Antimicrobial
  • Catalyst