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. 2016 Dec;11(1):518.
doi: 10.1186/s11671-016-1742-9. Epub 2016 Nov 25.

Removal of Metal Nanoparticles Colloidal Solutions by Water Plants

Olga Olkhovych  1 , Nataliia Svietlova  2 , Yevheniia Konotop  1 , Olena Karaushu  1 , Svitlana Hrechishkina  1
Affiliations

Removal of Metal Nanoparticles Colloidal Solutions by Water Plants

Olga Olkhovych et al. Nanoscale Res Lett. 2016 Dec.

Abstract

The ability of seven species of aquatic plants (Elodea canadensis, Najas guadelupensis, Vallisneria spiralis L., Riccia fluitans L., Limnobium laevigatum, Pistia stratiotes L., and Salvinia natans L.) to absorb metal nanoparticles from colloidal solutions was studied. It was established that investigated aquatic plants have a high capacity for removal of metal nanoparticles from aqueous solution (30-100%) which indicates their high phytoremediation potential. Analysis of the water samples content for elements including the mixture of colloidal solutions of metal nanoparticles (Mn, Cu, Zn, Ag + Ag2O) before and after exposure to plants showed no significant differences when using submerged or free-floating hydrophytes so-called pleuston. However, it was found that the presence of submerged hydrophytes in aqueous medium (E. canadensis, N. guadelupensis, V. spiralis L., and R. fluitans L.) and significant changes in the content of photosynthetic pigments, unlike free-floating hydrophytes (L. laevigatum, P. stratiotes L., S. natans L.), had occur. Pleuston possesses higher potential for phytoremediation of contaminated water basins polluted by metal nanoparticles. In terms of removal of nanoparticles among studied free-floating hydrophytes, P. stratiotes L. and S. natans L. deserve on special attention.

Keywords: Aquatic plants; Metal nanoparticles; Phytoremediation; Water macrophytes.

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Figures

Fig. 1
Fig. 1
The appearance of aquatic plants exposed to the mixtures of colloidal solutions of metal nanoparticles on the 7th day
Fig. 2
Fig. 2
The content of elements in the water after exposure of hydrophytes after 7 days (K1—settled tap water, K2—settled tap water with the addition of colloidal solutions of metal nanoparticles)
Fig. 3
Fig. 3
The content of pigments in aquatic plants under the influence of a mixture of colloidal solutions of metal nanoparticles on the 7th day
Fig. 4
Fig. 4
The chlorophyll a/b ratio in aquatic plants under the influence of a mixture of colloidal solutions of metals nanoparticles on the 7th day
See this image and copyright information in PMC

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