活性炭对铅镉镍钴离子的吸附机理探讨

The Adsorption Mechanism of Pb￣(2+),Cd￣(2+),Ni￣(2+) and Co￣(2+) onto Activated Carbon Particles

研究了活性炭对Ｐｂ￣（２＋）、Ｃｄ￣（２＋）、Ｎｉ￣（２＋）、Ｃｏ￣（２＋）的吸附作用，以及各环境条件因素对这种吸附作用的影响。实验表明，活性炭对所试离子的吸附作用可用表面络合吸附模式描述，应用简化络合反应模式求取了活性炭颗粒与所试离子的表面络合形成条件稳定常数。

The adsorption of Pb￣(2+), cd￣(2+),Ni￣(2+),Co￣(2+) on activated carbon particles was studied as afunction of pH and concentrations of adsorbates.Theseresults showed that the adsorption was strongly pH-dependent and all the adsorption isotherms were inagreement with Freundlich equation. The adsorptioncould be explained by the surface complexation modes.Conditional adsorption constants of surface complexesof Pb￣(2+),Cd￣(2+), Ni￣(2+) and Co￣(2+) with activated carbon particies were calcuiated by a simplified surface com-plexation model.