Differential pulse polarography: a method for the direct study of biosorption of metal ions by live bacteria from mixed metal solutions.

摘要: The technique of differential pulse polarography is shown here to be applicable the monitoring directly biosorption metal ions from solution by live bacteria mixed solutions. Biosorption Cd(II), Zn(II) and Ni(II) P. cepacia was followed using data obtained at potential which characteristic ion in absence presence cells. Hepes buffer (pH 7.4, 50 mM) used as a supporting electrolyte polarographic chamber peaks cells lower amplitude were due metal-binding Well defined experiments involving mixtures Cd(II)-Zn(II), Cu(II)-Zn(II), Cu(II)-Cd(II) Cd(II)-Ni(II). increased with pH. method also tested rapid for assessing removal ability measuring solutions demonstrated. Cu(II) preferentially bound metals order > Zn(II), Cd(II) intact cepacia.