Journal
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
Volume 21, Issue 6, Pages 449-459Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/1536383X.2011.613538
Keywords
Adsorption; multi-walled carbon nanotubes; ammonium ions; thermodynamic functions; adsorption kinetics
Ask authors/readers for more resources
This study was an attempt to examine the feasibility of removing ammonium ions from aqueous solutions by using multi-walled carbon nanotube (MWCNT). The adsorption behavior of ammonium ions (NH4+) from aqueous solution onto MWCNTs was investigated as a function of several parameters such as contact time, initial ammonium ion concentration and temperature. The adsorption of ammonium ions on carbon nanotube was studied at different temperatures ranging from 288 K to 328 K. Enthalpy (Delta H-0) and entropy (Delta S-0) of the procedure were -2.74 KJ/mol and -0.0083 KJ/mol K, respectively. The negative value of Delta H-0 indicates that the adsorption of ammonium ions onto CNTs is exothermic and that the negative value of Delta G(0) represents the fact that the process of adsorption of ammonium ions onto CNTs is spontaneous. Kinetic analysis showed that the adsorption of ammonium ions on MWCNT followed the pseudo-second-order model.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available