Biosorption of nickel (II) and zinc (II) from aqueous solutions by the biomass of yeast Yarrowia lipolytica

Abstract

This study examined the biosorption process of Ni(II) and Zn(II) from an aqueous solution by dead biomass of Yarrowia lipolytica. Optimum biosorption conditions were determined as a function of pH, biomass dosage, contact time, and temperature. The biosorbent was characterized by FTIR, which indicated the participation of hydroxyl, carboxyl, amide and amine groups in the process of binding the metal ions. The results showed that the biosorption processes of both metal ions closely followed pseudo-second order kinetics. The equilibrium data of Ni(II) and Zn(II) ions at 20, 30 and 40 o C fi tted the Langmuir and Freundlich isotherm models. Langmuir isotherm provided a better fi t to the equilibrium data, with a maximum biosorption capacity of the Y. lipolytica biomass for Ni(II) and Zn(II) of 30.12 and 44.44 mg/g respectively. The calculated thermodynamic parameters demonstrated that the biosorption of Ni(II) and Zn(II) ions onto the Y. lipolytica was feasible, spontaneous and endothermic.

Removal of Manganese and Copper from Aqueous Solution by Yeast Papiliotrema huenov

“…The results indicate that within the temperature range investigated, the biological uptake of Mn(II) and Cu(II) by biomass of P. huenov was a thermal reaction; an increase in temperature resulted in accelerated ion diffusion. This was in agreement with the results of other authors, which determined that increasing temperature from 20 to 40 C resulted in an increase in the maximum biosorption of Ni(II) from 11.48 to 15.64 mg/g and of Zn(II) from 15.9 to 19.21 mg/g using Y. lipolytica biomass [67]. However, C. krusei biosorption deceased when temperature increased to 50 C, probably due to denaturation of the enzymes, reducing the uptake of copper(II) [64].…”

Rotatable central composite design versus artificial neural network for modeling biosorption of Cr6+ by the immobilized Pseudomonas alcaliphila NEWG-2

“…The removal of such metals is an urgent issue from health, economic, and environmental points of view. Several conventional methods of heavy metals removal had been described earlier, such as ion exchange, coagulation, flotation, reverse osmosis, and electrochemical process 6 . The conventional methods were found to have many disadvantages, e.g.…”

Adsorption process and mechanism of heavy metal ions by different components of cells, using yeast (Pichia pastoris) and Cu2+ as biosorption models

“…Sławomir Wierzba also found that -CH 2 and CH 3 were the biosorption group in the yeast cell. 78 The peaks observed at 1650 cm À1 was attributed to amide I band (stretching vibration of C]O), 1540 cm À1 indicated the amide II band (stretching vibration of C-N and bending vibration of N-H), 1248 cm À1 was attributed to amide III band (stretching vibration of C-N and bending vibration of N-H). 79,80 Aer biosorption, the wavenumber shied to 1642 cm À1 ,1546 cm À1 ,1244 cm À1 respectively, further proved that protein played an important role in the biosorption of Cu 2+ .…”