Open AccessStudy of Mechanisms Used by Algae to Decrease The Silver Toxicity in Aquatic Environment
Author(s) -
Jana Sedláková-Kaduková,
Peter Pristaš
Publication year - 2021
Publication title -
inżynieria mineralna
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.215
H-Index - 9
ISSN - 1640-4920
DOI - 10.29227/im-2019-01-21
Subject(s) - bioaccumulation , biosorption , silver nanoparticle , algae , environmental chemistry , aqueous solution , chemistry , toxicity , nuclear chemistry , biomass (ecology) , green algae , botany , nanoparticle , adsorption , biology , ecology , nanotechnology , materials science , sorption , organic chemistry
In the study SEM, EDS, TEM and UV-vis analysis were used to investigate the biosorption, bioaccumulation and bioprecipitation/bioreduction of silver by freshwater green alga Parachlorella kessleri and to shed light on the reasons of biological silver nanoparticleproduction. When dead biomass of P. kessleri was used for silver removal, majority of silver (75%) was removed within2 min. Biosorption was probably the main mechanisms responsible for Ag+ ions removal from aqueous solutions. However, whenbehaviour of living biomass in the presence of silver ions was studied, the decrease of silver concentration was slower (68% within24 hours) with subsequent increase of silver concentration in the solution and extracellular formation of silver nanoparticles. Theformed AgNPs exhibited a lower toxicity against tested organisms. Algal cells probably used the formation of nanoparticles combinedwith rapid biosorption as detoxification mechanisms against silver toxicity. Bioaccumulation inside the cells played only aminor role in the detoxification process.