Abstract
With the rapid development of lead refineries and the wide application of leaded work in electrical industry, lead(II) pollution has deserved much attention. In this study, the kinetic models of lead(II) adsorption onto silica-based hybrid membranes as solid adsorbents were studied. To study the adsorption mechanism of heavy metal ions on these hybrid adsorbents, the experimental data were linearly fitted using six typical two-parameter kinetic equations (i.e. Lagergren pseudo-first-order and pseudo-second-order, Ritchie second-order and modified second-order, Elovich, as well as intraparticle diffusion models). It was found that the experimental results fitted well with Lagergren pseudo-second-order model, Elovich, and intraparticle diffusion models. These findings are very useful in the design and optimization of silica-based hybrid membranes for lead(II) removal from water by adsorption.
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