Equilibrium and Kinetic Studies for the Biosorption of Aqueous Nickel(II) Ions onto the Pseudomonas alcaligenes Biomass
The objective of this study is to assess the environmentaly friendly Ni(II) adsorption from synthetic wastewater using Pseudomonas alcaligenes biomass (PA-2). The ability of PA-2 to remove the Ni(II) ions was investigated by using batch biosorption procedure. The effects such as pH, dosage of biosorbent, Ni(II) initial concentration and sorbate–sorbent contact time and agitating speed on the adsorption capacities of PA-2 were studied. Biosorption equilibriums were rapidly established in about 60 min and the adsorption kinetics followed the pseudo-second order kinetic model. The maximum Ni(II) adsorption capacity determined from Langmuir isotherm were 82.23 mg/g PA-2 at pH 5.0, at 25±2°C and shaker speed 150 rpm, respectively. The carboxyl , hydroxyl and amino groups of the PA-2 were involved in chemical interaction with the Ni(II) ions depicted by Fourier transform infrared spectroscopic (FTIR) results. The study points to the potential of new use of Pseudomonas alcaligenes biomass as an effective biosorbent for the removal of Ni(II) and from environmental and industrial wastewater.
Zhihua Xu, Gang Shen and Sally Lin
X. C. Xiao et al., "Equilibrium and Kinetic Studies for the Biosorption of Aqueous Nickel(II) Ions onto the Pseudomonas alcaligenes Biomass", Advanced Materials Research, Vols. 171-172, pp. 41-44, 2011