| 초록 |
This research highlights the possibility of employing a fermentation industry waste (Corynebacterium glutamicum) for the removal of nickel(II) ions from aqueous solution. The potentiometric titration as well as FT-IR examination revealed the existence of carboxyl, phosphonate and amine groups on the cell wall of C. glutamicum. The biomass performed well in nickel(II) biosorption; and considering the nickel speciation and biosorption performance, pH 6 was identified as optimal condition. To enhance the feasibility of using the biomass in column mode as well as reusing it for multiple cycles, C. glutamicum was immobilized in a polysulfone matrix. Desorption was feasible only with immobilized beads and the elutant (0.1 M HCl) provided efficiencies greater than 99%. An up-flow packed column loaded with immobilized biomass performed well in the biosorption of nickel(II), and exhibited a delayed and favorable breakthrough curve with Ni2+ uptake and % removal of 48.1 mg/g biomass and 60.4%, respectively. |
