活性炭自溶液吸附锌(II)离子及其配合物

近年来，有人提出通过表面处理提高活性炭表面电荷，加强对无机离子吸附力等观点，但活性炭对无机离子的吸附活性点，表面含氧基团及配体对吸附的影响等重要问题仍众说纷经[1－4]为此，本文提出用氧化一负离子化法处理活性炭，以表面酸度表征表面含氧基团的量，探讨活性炭对Zn（Ⅱ）及其配合物的吸附特性．1试验（1）试验材料活性发由北京光华木材厂出品，分析纯．过20－30目，BET法测得比表面为1316m2·g-1．在2．5×10－2mlo·dm－3的NaNO3中，测得等电点pHIEP为7．75[5]，元素含量（质量分数）为C（83．9％），N（0．07％），H（1…

Adsorption of Zinc(II) Ion and its Complexes from Solution by Activatied Charcoal

The adsorption characteristics of Zn2 from electrolytic solution by activatedcharcoal have been investigated. It was found that the amount of adsorption of Zn2 depends mainly on pH value of the solution, added inorganic ions and containing Oxygen groups on the surface. The activated charcoal was treated with oaldation-negativeionizing (OA) method in order to produce more containing oxygen groups on the surface.The adsorption amount of Zn2 on the treated activated charcoal increased remarkbly. Itwas also found that the more times the activated charcoal was treated, the moe powerfulthe acidity of the surface, and the larger the adsorption amoUn of Zn2 , so the chargedgrorps on the surface of activated charcoal are considered as the main adsorption activatedsites for inorganic ions. The adsorption characteristics of various complexes of Zn2 onthe surface of activated charcoal have also been investigated. Three types of adsorptionnconfiguration of the complexes of Zn2 on the surface of activated charcoal were suggestedaccording to the experimental results.