Abstract
The aim of this study was to carry out a systematic investigation of the adsoption of 137Cs on to Kaolinite clay mineral from Balikesir region which is west of Turkey. The adsorption behavior of kaolinite mineral was studied by means of a batch method using 137Cs as a radio tracer. Experiments were carried out for clay size of 30.00 μm and six different initial concentrations of 137Cs. In experiments, solid/ liquid ratio and contact time were determined to be 250 mL/g and 60 minutes, respectively. Adsorption percent (Ads%) and distribution coefficient (Kd) values were calculated according to the adsorption experiment results. After Langmuir Isotherm was applied, the clay adsorption capacity was calculated using Least Squares Method. It was observed that Ads% and Kd values decreased with increasing the liquid phase concentrations ranging from 1.68x10-4 M to 5.88x10-4 M. The constants depending on adsorption energy (b), adsorption capacity (Xm), and removal efficiency (R) were determined to be 17.56×103 mg/kg, 0.038 L/g and 93%, respectively. Kaolinite was found to be having both a good adsorption capacity and a rapid adsorption rate for 137Cs.
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