Adsorption Behavior, Thermal Degradation Process and Kinetics of Hydrothermal Synthesis Materials

摘要

In this research, hydrothermal synthesis techniques are used to prepare three different samples. These samples are tested to determine if they have properties that are suitable to be used as ion exchangers. The behavior of prepared materials was studied for the removal of Cs+ and Ni2+ ions from solution. The distribution coefficient of Cs+ and Ni2+ on different samples was studied at different pH values. Thermodynamic parameters such as energy of activation (Ea), entropy of activation (ΔS*) and enthalpy of activation (ΔH*) have been calculated from Van’t Hoff equation by using adsorption mechanism. Thermal degradation operation and kinetics of different prepared samples have been studied by (TGA and DTA). The degradation temperature linearly increase with the increasing heating rate. To calculate the actual reaction mechanism of the decomposition process, it is important to ascertain the magnitude of activation energy. This was determined by using the Ozawa method.