“…The effect of pH value and multi-metals on adsorption of various metal ions had been reported. The low metal biosorption was attributed to the competition that metal ions face from hydrogen ions or other metal ions for the available biosorption sites [14,15].…”
Section: Determination Of the Kinds Of Metal Ions For Studymentioning
“…In many cases, heavy metal toxicity is reduced at acidic pH values, despite the often increased metal availability, possibly owing to decreased uptake [11].…”
Section: Effect Of Ph On the Pb 2+ Accumulationmentioning
The optimum pH conditions of Pb 2+ accumulation in Saccharomyces cerevisiae and Aureobasidium pullulans were 4$5 and 6$7, respectively. The initial Pb 2+ accumulation rates according to the increase of initial Pb 2+ concentration and pH were increased both in S. cerevisie and A. pullulans. And the initial Pb 2+ accumulation rate of A. pullulans was much higher than that of S. cerevisiae because of the difference of Pb 2+ accumulation mechanism. The Pb 2+ accumulation isotherm of S. cerevisae obeyed a fully competitive inhibition, whereas that of A. pullulans showed a mixed inhibition of competition and non-competition associated with the proton (H + ) as an accumulation inhibitor.
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