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Elnaz Khadivinia,Hakimeh Sharafi,Faranak Hadi,Hossein Shahbani Zahiri,Sima Modiri,Azadeh Tohidi,Amir Mousavi,Ali Hatef Salmanian,Kambiz Akbari Noghabi 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
In this study, biosorption of cadmium (II) ions from aqueous solutions by a glyphosate degradingbacterium, Ochrobactrum sp. GDOS, was investigated in batch conditions. The isolate was able to utilize3 mM GP as the sole phosphorous source, favorable to bacterium growth and survival. The effect ofdifferent basic parameters such as initial pH, contact time, initial concentrations of cadmium ion andtemperature on cadmium uptake was evaluated. The adsorption process for Cd (II) is well fitted withLangmuir adsorption isotherm. Experimental data were also tested in terms of biosorption kinetics usingpseudo-first-order and pseudo-second-order kineticmodels. Maximummetal uptake qmax was obtainedas 83.33 mg g1. The sorption process of cadmium onto the Ochrobactrum sp. GDOS biomass followedsecond-order rate kinetic (R2 = 0.9986). A high desorption efficiency was obtained in pH 2. Reusability ofthe biomass was examined under successive biosorption–desorption cycle repeated thrice. Thecharacteristics of the possible interactions between biosorbent and metal ions were also evaluated byscanning electron microscope (SEM), Fourier transform infrared (FT-IR) and X-ray diffraction analysis.