Discharge of heavy metals from metal processing industries is known
to have unfavorable effects on the environment. Conventional
treatment technologies for removal of heavy metals from aqueous
solution are not economical and generate huge quantity of toxic
chemical sludge. Biosorption of heavy metals is an innovative and
alternative technology for removal of these pollutants from aqueous
solution. The study was aimed to quantify the Cr (VI) sorption
ability of Baker's yeast at the best operating conditions. The
optimum pH for biosorption of Cr (VI) ions was found to be 3.0. The
percentage removal Cr (VI) ions from solution was decreased with
increase in concentration from 10 to 50 mg/L whereas, uptake
capacity was increased with increase in concentration of Cr (VI)
ions from 10 to 50 mg/L. The percentage removal and biosorption
capacity increased with increases time from 3-24 hrs then become
constant. Uptake capacity "q" (mg/g) of Cr (VI) ions decreased with
increased biosorbent dose. Higher value of correlation coefficient
(R2
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