Article

Adsorption kinetics of zinc in multicomponent ionic systems.

Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Extremadura, Avda de Elvas S/N, E-06071 Badajoz, Spain.
Journal of Colloid and Interface Science (impact factor: 3.07). 10/2004; 277(2):292-8. DOI:10.1016/j.jcis.2004.04.039 pp.292-8
Source: PubMed

ABSTRACT Using commercial activated carbon as an adsorbent, the kinetics of adsorption of zinc from multicomponent ionic systems having cadmium and mercury has been studied and reported. The variables investigated have been the chemical nature, ionic strength, and pH of the adsorptive (Zn2+) solution. The adsorption of Zn2+ is speeded up by the presence of Cd2+ and Hg2+ ions provided that the concentration of these two ions is high as compared to the concentration of Zn2+. When the ionic strength of the solution in relative terms is high (i.e., > 3 x 10(-4) M), however, the adsorption of Zn2+ decelerates. Also, the adsorption process is greatly accelerated at pH 12, whereas at pH 2 it does not occur at all.

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Keywords

adsorptive
 
cadmium
 
chemical nature
 
ionic strength
 
kinetics
 
multicomponent ionic systems
 
relative terms
 
two ions
 
variables