论文部分内容阅读
文章探讨了γ-Al_2O_3吸附EDTA及其络合物的特征和电性规律,它们的吸附量随pH上升而下降,氧化铝的表面质子化基因AlOH_2~+是吸附的活性基团。γ-Al_2O_3吸附EDTA或其络合物后等电点降低,属特性吸附。γ-Al_2O_3对络合物不同物种有选择性吸附。另外,对于Cd(Ⅱ)和EDTA不同加入次序和不同加入比例的体系,γ-Al_2O_3对Cd(Ⅱ)的吸附量有较大差别,这在环境保护上有实际意义。
In this paper, the characteristics and electrical properties of EDTA adsorbed on γ-Al 2 O 3 and its complexes were investigated. Their adsorption capacity decreased with the increase of pH. The surface protonated gene AlOH_2 ~ + of alumina was the active group adsorbed. γ-Al_2O_3 adsorption of EDTA or its complex reduced isoelectric point, is a characteristic adsorption. γ-Al 2 O 3 selective adsorption of different species of complex. In addition, the adsorption capacity of Cd (Ⅱ) to γ-Al 2 O 3 is quite different for Cd (Ⅱ) and EDTA with different addition order and different addition ratios, which has practical significance in environmental protection.