Papers by Author: Fa Zhi Ge

Abstract: The Cs(I) biosorption characteristics of Pseudomonas alcaligenes biomass was examined as a function of initial pH, contact time and initial metal ion concentration. FTIR spectra showed that the principal functional sites taking part in the sorption process included carboxyl, hydroxyl groups and -CH3 stretching groups. The pseudo-second-order kinetic model was found to be well suited for the entire adsorption process of Cs(I) on Pseudomonas alcaligenes, which indicated the biosorption process operated through chemisorption mechanism. Adsorption equilibrium studies showed that Cs(I) adsorption data followed the Langmuir model, the maximum binding capacity of Cs(I) according to Langmuir isotherm were 81.05mg/g at pH 7.0 , shaker speed 150 rpm, at 27°C and for 60 min. The present study indicated that Pseudomonas alcaligenes biomass may be used as an inexpensive, effective and easily cultivable biosorbent for the removal of Cs(I) ions from environmental and industrial wastewater.

Abstract: The present study was undertaken to evaluate the feasibility of Pseudomonas fluorescens biomass for the removal of cadmium ions from aqueous solutions. Batch experiments were performed to study the adsorption of cadmium on pH, Pseudomonas fluorescens biomass adsorbent with respect to initial Cd(II) concentration, contact time and biomass dose. The experimental data were modeled by Langmuir and Freundlich isotherm models. Langmuir model resulted in the best fit of the adsorption data. The maximum adsorption capacity for Cd(II) was 66.25 mg/g (pH 5.0 and 5 g/L biomass dose). Kinetics of adsorption followed second-order rate equations. The FTIR results of Pseudomonas fluorescens biomass showed that biomass has different functional groups and these functional groups are able to react with metal ion in aqueous solution. The results of the present study suggest that Pseudomonas fluorescens biomass can be used beneficially in treating industrial effluents containing heavy metal ions.