ISSN:
1573-0972
Keywords:
Azotobacter vinelandii
;
biosorption
;
cadmium
;
copper
;
metals
;
polysaccharide
;
uptake
;
uranium, zinc
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Abstract Azotobacter vinelandii was better than eitherDerxia gummosa orRhizobium trifolii for sorption of UO 2 2+ . Its maximum binding capacity was 0.25 mmol UO 2 2+ /g dry biomass with an affinity constant of 333 l/mmol at pH 4.1 according to the Langmuir model. In a semisynthetic medium,A. vinelandii showed the highest sorption capacity in the early stationary phase. The binding of UO 2 2+ , Cu2+, Ca2+ and Zn2+ was affected by the pH of the solution. With HCl as eluent, virtually all the sorbed UO 2 2+ was released. The presence of Cu2+, Cd2+, Ca2+, and Zn2+ inhibited the UO 2 2+ biosorption whereas Mg2+ and K+ had no effect.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01201889
Permalink