Аннотация:Wastewater, containing vanadium, uranium,
and lanthanum are produced by mining, nuclear, and
other industries. Bacteria Pseudomonas putida,
Halomonas mono, and cyanobacterium Spirulina
platensis were used for lanthanum, vanadium, and uranium,
removal from aqueous solutions by means of
biosorption and bioreduction processes. A rapid rate of
metal adsorption was observed within the first 5–15 min
of the reaction. The pseudo-first-order model was found
to correlate well with the experimental data. Bacteria
show higher metal biosorption in comparison with
cyanobacteria. The strong involvement of carboxyl, hydroxyl,
carboxyl, and amide groups in studied metal
binding was ascertained by FT-IR spectroscopy.
Bioreduction studies carried out with Pseudomonas
putida and Halomonas mono cells showed highness of
metal reduction in alkaline conditions, resulting in the
bioreduction of 69 and 85% of vanadate ions and 48 and
64% of uranyl ions, respectively. Using geochemical
modeling, the insoluble metal phases were determined