多组分离子体系中锌的吸附动力学
Adsorption kinetics of zinc in multicomponent ionic systems.
作者信息
Pardo-Botello R, Fernández-González C, Pinilla-Gil E, Cuerda-Correa E M, Gómez-Serrano V
机构信息
Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Extremadura, Avda de Elvas S/N, E-06071 Badajoz, Spain.
出版信息
J Colloid Interface Sci. 2004 Sep 15;277(2):292-8. doi: 10.1016/j.jcis.2004.04.039.
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.
以商用活性炭作为吸附剂，对含有镉和汞的多组分离子体系中锌的吸附动力学进行了研究并予以报道。所研究的变量包括吸附性（Zn2+）溶液的化学性质、离子强度和pH值。只要Cd2+和Hg2+离子的浓度相对于Zn2+的浓度较高，Zn2+的吸附就会因这两种离子的存在而加速。然而，当溶液的相对离子强度较高时（即> 3×10(-4) M），Zn2+的吸附会减速。此外，吸附过程在pH 12时大大加速，而在pH 2时根本不会发生。
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