Analysis of Strontium Isothermal Adsorption Using Metal-Organic Frameworks [HKUST-1] Based on Variation of Operating Temperatures and Variations of Main Initial Concentration

Sr-90, as one of the nuclear waste materials with the highest yield, has the potential to pollute the environment if an accident occurs in nuclear power plants. So in this study MOFs who have very small pores, cavity shapes and structured geometry used as adsorbent material to purifying Sr waste. 25 mg of mass adsorbent was used to 100 ml volume of the sample. The operating temperature was variated into 25 degrees C, 35 degrees C, and 45 degrees C. Variations of the initial concentration used in the sample were 100 ppm, 50 ppm, and 25 ppm. Then the sampling points have been determined in the 10th, 30th, 40th, 50th, 60th, 90th and 120th minutes. The AAS test was used to determine the Sr concentration of the solution which was successfully adsorbed. One way ANOVA test was used to analyzing the effect of temperature on the adsorption process. Adsorption modeling test was carried out according to Langmuir and Freundlich isotherm model. The variation of the concentration of the main solution in the strontium isotherm adsorption process in the test solution has an effect on the adsorption process conducted by HKUST-1. Variation of operating temperature in the adsorption process also takes an effect of that strontium adsorption process in the test solution. That is, with the highest temperature of 45 degrees C, the adsorption capacity that is owned is the highest adsorption capacity of 434.78 mg / g. In general, both of the Langmuir and Freundlich isotherm adsorption models are matched to this strontium isotherm adsorption process using HKUS T-1 adsorbent.