假二级反应模型在泥煤吸附Ni(II)中的应用(英文)

Pseudo-second-order Model for Sorption of Nickel (II) onto Peat

应用液闪分析手段,简要地研究了pH值对63Ni在泥煤中吸附的影响。结果表明,63Ni迅速地被泥煤吸附而达到吸附平衡,水相pH值的增加有利于泥煤的吸附。63Ni在泥煤上吸附动力学行为可以很好地用假二级反应进行描述。

Peat contains many functional groups, such as alcohols, aldehydes, acids, and phenolic hydroxides which can be involved in chemical bonding with metallic ions. The use of peat for removal of nickel from aqueous solution has been investigated at various a- queous pH values by means of liquid scintillation counting. The present research shows that the ability of binding Ni on peat increases with increment of aqueous pH values and reaches the adsorption equilibrium rapidly. A reasonable kinetic model, pseudo - second - order model, has been developed and fitted for sorption of nickel （Ⅱ） onto peat. The pseudo - second - order model provides a high degree of correlation with the experimental data for the sorption of nickel on to peat.