Abstract
This study was an attempt to examine to the feasibility of removing ammonium ions from aqueous solutions by using multi-walled carbon nanotube (MWCNT). The adsorption behavior of ammonium ions from aqueous solution onto multi-walled carbon nanotube (MWCNTs) was investigated as a function of several parameters such as contact time, initial ammonium ions concentration, and temperature. The removal of ammonium ions on carbon nanotube was studied at different temperatures ranging from 288 to 328 K. Thermodynamics parameters such as enthalpy (ΔH0) and entropy (ΔS0) of the procedure were −2.74 KJ/mol and −0.0083 kJ/mol K, respectively. The negative value of ΔH0 indicates that the removal of ammonium ions by MWCNT is exothermic and also the negative value of ΔG0 represents the fact that the process of removal of ammonium ions by MWCNT is spontaneous.
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