Abstract
Thermally treated hydrotalcite was synthesized and its ability to sorb 99Mo from aqueous solutions was studied under static conditions as a function of initial concentration, amount of sorbent and pH. X-ray diffraction was used to characterize synthesized calcined hydrotalcite. The values of sorption data were fitted to Freundlich, Langmuir and Dubinin-Radushkevich (D-R) sorption isotherms. The mean energy of sorption was calculated as 5.24 kJ. mol-1from D-R sorption isotherm. The Lagergren equation has been used for the study of the kinetic process. The rate constants of 99Mo sorption on calcined hydrotalcite were calculated at various temperatures (293-323 K). The thermodynamic constans have been calculated and the standard enthalpy of the system was found to be DH°=11.5±0.3 kJ. mol-1. The values of calculated DG° and DS° were -13.9±2.0 kJ. mol-1and (8.7±0.2). 10-2kJ. K-1. mol-1, respectively. These results show that the sorption process is endothermic, spontaneous in nature and the degree of freedom of ions is increased by sorption.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
