Biosorption of nickel(II) ions on Baker's yeast

The process of biosorption of heavy metals in bioreactors loaded with sanitary sewage sludge

“…Similar behavior was observed by Petroni et al (2000) in their studies on removal of cadmium and zinc using turf as biosorbent. Barros Jr et al (2002) verified that the biomass of a fungus attained 94% of its saturation capacity and about 84% of its biosorption capacity.…”

“…Concentrations of the heavy metals in the affluents and effluents were determined daily with a UV-Visible Coleman 395D spectrophotometer, using the dimethylglyoxime method for Ni(II) at 530nm (Padmavathy et al, 2003) and the potassium dichromate method for Cr(III) at 440nm adapted from Vogel et al (2000). The concentrations were calculated from the calibration curves (from 0.0 to 0.5 mg Ni 2+ L -1 for nickel and from 0.0 to 12.0 mg Cr 3+ .L -1 for chromium).…”

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“…Biosorption of heavy metals from aqueous solution is an efficient technology in industrial wastewater treatment. A number of studies have demonstrated the feasibility of using plant biomass [6][7][8] and also using biomass of micro-organisms [9][10][11] to remove heavy metal ions from wastewater streams. The major advantages of biosorption technology are its effectiveness in reducing the concentration of heavy metal ions to very low levels and the use of inexpensive biosorbent materials.…”

Biosorption of Ni<sup>2+</sup> and Cd<sup>2+</sup> from Aqueous Solutions Using NaOH-Treated Biomass of <i>Eupenicillium ludwigii</i>: Equilibrium and Mechanistic Studies

“…At low pH values, protons in solution compete effectively with metals in binding to functional groups. pH effect may be further explained in relation to the competition effect between the hydronium ions (H 3 O + ) and metal ions [25]. As initial pH increases, the active sites are being deprotonated and strengthened the charge attraction, thus leading to significant increase in Ni 2+ and Cd 2+ biosorption.…”