Abstract
The effect of chemical treatment of pine cone with toluene–ethanol mixture on the selectivity, kinetics and mechanism of Cs removal in the presence of electrolytes was examined. Increased hydrophilicity and Cs affinity was observed for treated pine due to organics extraction, increased surface area and formation of carboxylate ions which also produced higher uptake rates for pseudo-first and second order rate constants as compared with the raw pine. Diffusion–chemisorption model better fitted the kinetic data for the treated pine while the pseudo-second order model fitted the raw pine. Cs+, Na+ and Ca2+ ions were found to be adsorbed onto similar sites and the metals were adsorbed in their anhydrous forms. Addition of Na+ and Ca2+ reduced Cs capacity, Cs uptake rate and altered the sorption mechanism. Cs adsorption mechanism was altered by Ca2+ addition and the more porous nature of the treated pine surface. Effect of competition was attributed to ionic radii of Ca2+ (0.99Å) and Na+ (1.02Å) which are smaller than Cs+ (1.67Å).
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 callMore From: Journal of the Taiwan Institute of Chemical Engineers
Disclaimer: 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.
