In this study, biosorption of cadmium (II) ions from aqueous solutions by a glyphosate degrading
bacterium, Ochrobactrum sp. GDOS, was investigated in batch conditions. The isolate was able to utilize
3 mM GP as the sole phosphorous source, favorable to bacterium growth and survival. The effect of
different basic parameters such as initial pH, contact time, initial concentrations of cadmium ion and
temperature on cadmium uptake was evaluated. The adsorption process for Cd (II) is well fitted with
Langmuir adsorption isotherm. Experimental data were also tested in terms of biosorption kinetics using
pseudo-first-order and pseudo-second-order kineticmodels. Maximummetal uptake qmax was obtained
as 83.33 mg g1. The sorption process of cadmium onto the Ochrobactrum sp. GDOS biomass followed
second-order rate kinetic (R2 = 0.9986). A high desorption efficiency was obtained in pH 2. Reusability of
the biomass was examined under successive biosorption–desorption cycle repeated thrice. The
characteristics of the possible interactions between biosorbent and metal ions were also evaluated by
scanning electron microscope (SEM), Fourier transform infrared (FT-IR) and X-ray diffraction analysis.
2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights