Adsorption of Cu2+ and Ni2+ ions from their aqueous solutions using orange (Citrus aurantium) mesocarp and xanthated orange mesocarp
AbstractThe adsorption of Cu2+ and Ni2+ions at room temperature (27°C) onto two types of biomass produced from orange mesocarp namely: untreated orange mesocarp (Me) of 250 μm particle size and xanthated orange mesocarp (XMe) produced from Me of 250 μm particle size were studied. The results obtained showed that xanthated orange mesocarp (XMe) was a better adsorbent than the untreated orange mesocarp (Me) at room temperature for the removal of Cu2+ and Ni2+ions. At room temperature, both untreated orange mesocarp (Me) and xanthated orange mesocarp (XMe) showed the following order of selectivity: Ni>Cu. The adsorption isotherm of the metals fit both the Langmuir and Freundlich isotherm models. The selectivity (Xm) for the metal ions according to Langmuir model were in the order Cu2+>Ni2+and Ni2+>Cu2+ for Me and XMe respectively. The selectivity (n) for the metal ions according to Freundlich isotherm model were in the order Ni2+>Cu2+ for both Me and XMe.
Keywords: Metal adsorption, copper, nickel, orange mesocarp
International Journal of Natural and Applied Sciences, 7(1): 115 - 122, 2011