Mechanism of aluminum interference on uranium biosorption by Rhizopus arrhizus

 
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1997 (EN)
Mechanism of aluminum interference on uranium biosorption by Rhizopus arrhizus (EN)

Tsezos, M (EN)
Remoudaki, E (EN)
Georgousis, Z (EN)

N/A (EN)

Uranium competitive uptake experiments by Rhizopus arrhizus were carried out at three different solution pH levels in the presence of different concentrations of competing aluminum ions in order to examined the competing ion effect. The coion effect became more pronounced as the coion concentration in solution and pH level increased. A preliminary examination of the effect of aluminum on the rate of uranium uptake was also completed. Results showed that the presence of aluminum does not interfere with the kinetics of uranium uptake by R. arrhizus. Electron microscopic and energy dispersive X-ray analyses were also performed on samples of the biomass. The combination of spectral data and the information from the equilibrium studies and the kinetic studies suggested that aluminum interferes with the uranium biosorptive uptake capacity of R. arrhizus by the precipitation of a metastable amorphous hydroxy polymeric precipitate through a mechanism we refer to as steric competition.Uranium competitive uptake experiments by Rhizopus arrhizus were carried out at three different solution pH levels and in the presence of different concentrations of competing aluminum ions in order to examine the competing ion effect. The coion effect became more pronounced as the coion concentration in solution and pH level increased. A preliminary examination of the effect of aluminum on the rate of uranium uptake was also completed. Results showed that the presence of aluminum does not interfere with the kinetics of uranium uptake by R. arrhizus. Electron microscopic and energy dispersive X-ray analyses were also performed on samples of the biomass. The combination of spectral data and the information from the equilibrium studies and the kinetic studies suggested that aluminum interferes with the uranium biosorptive uptake capacity of R. arrhizus by the precipitation of a metastable amorphous hydroxy polymeric precipitate through a mechanism we refer to as steric competition. (EN)

journalArticle

rhizopus (EN)
Aluminum (EN)
metal binding (EN)
Biomass (EN)
aluminum (EN)
pH effects (EN)
X ray analysis (EN)
Composition effects (EN)
Competing ions (EN)
Mechanism (EN)
Fungi (EN)
binding competition (EN)
Rhizopus arrhizus (EN)
Uranium (EN)
Solutions (EN)
Reaction kinetics (EN)
transmission electron microscopy (EN)
Precipitation (chemical) (EN)
Energy dispersive X ray analysis (EDX) (EN)
adsorption (EN)
biomass (EN)
Ionic competition (EN)
Ions (EN)
Electron microscopy (EN)
X ray microanalysis (EN)
article (EN)
Sorption (EN)
Biosorption (EN)
nonhuman (EN)
uranium (EN)
kinetics (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

Biotechnology and Bioengineering (EN)

English

1997


John Wiley & Sons Inc, New York, NY, United States (EN)



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