eur op eanexhibitionofcreati vityandinnovation - Europe Direct Iasi

EUROINVENT 2013
Russian Federation
10.1.
Title
Authors
Institution
Description EN
Class no.
Biological treatment of industrial wastewater
containing zinc by Spirulina platensis
I. Zinicovscaia 1,3 , L. Cepoi 2 , T. Chiriac 2 , Gh. Duca 3 ,
T. Mitina 3 , M.V. Frontasyeva 1 , S.S. Pavlov 1 ,
S.F.Gundorina 1
1 Joint Institute for Nuclear Research, Dubna, Russia
2 Institute of Microbiology and Biotechnology of the Academy
of Science of Moldova
3 The Institute of Chemistry of the Academy of Sciences of
Moldova
Biotechnology based on sorption of heavy metals by
microorganisms offers a potential alternative to conventional
techniques for water purification, due to their low cost, prompt
availability, relatively high specific surface area and good
binding affinity. The possibility of using blue-green
microalgae Spirulina platensis from Institute of Microbiology
and Biotechnology of the Academy of Science of Moldova for
zinc removal from waste water of “Moldagrotehnica”, the
largest manufacturer of modern agricultural machinery in
Republic of Moldova, was studied.
To study accumulation of Zn by Spirulina biomass three types
of experiments were performed. Obtained data have shown that
for large-scale application biosorption processes are more
profitable than accumulation, because accumulation processes
are more expensive. During 1 hour of microalgae-wastewater
interaction approximately 50% of zinc ions were removed
from wastewater. Atomic absorption spectrometry was used to
determine concentration of Zn in waste water samples. The
samples of dry Spirulina biomass after exposure to wastewater
were subject to nondestructive instrumental neutron activation
analysis. A total of 12 elements: As, Au, Br, Fe, K, Na, Nd,
Np, Sb, Sm, W, and Zn were determined. Beside zinc removal
Spirulina platensis showed a high capacity for the iron
biosorption from wastewater.
The results of zinc ions biosorption from wastewater can be
used for elaboration of the special methods of metals removal
from wastewater from enterprises in the Republic of Moldova.
Innovative Research
INTERNATIONAL EXHIBITS
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