红壤对铝、锰离子的吸附特征 Ⅰ.铝、锰离子的非等当量交换  

EXCHANGE-ADSORPTION CHARACTERISTICS OF ALUMINIUM AND MANGANOUS IONS BY RED SOILSI .NONEQUIVALENT EXCHANGE OF ALUMINUM AND MANGANOUS IONS

作　　者：丁昌璞[1] 潘映华[1] 

机构地区：[1]中国科学院南京土壤研究所,南京210008

出　　处：《土壤学报》2002年第4期560-567,共8页Acta Pedologica Sinica

摘　　要：对铝、锰离子在红壤中的吸附特征进行了研究,结果表明:离子交换能（或吸附能）的次序为铝>锰>钙>钾,但同一离子在不同固相中的交换吸附能力有异。离子的代入量和代出量随其加入量而递增,而代入量占所加数量的百分数则递减,遵守一般的离子交换规律。非等当量性为铝或锰离子参与交换所出现的一种特殊现象,是由于其水解产物的非电性吸附叠加于电性吸附所致,尤以在砖红壤体系中者为甚;非电性吸附量与平衡溶液浓度的关系符合Freundlish方程。The study on exchange-adsorption of aluminium and manganous ions in red soils was carried out. The results were shown: Ion exchange power (or ion adsorbability) sequence was Al3+ > Mn2+ > Ca2+ > K+ and the amount of adsorbed ion and displaced ion increased with the amount of added ion, which acted according to the universal rules of ion exchange; Nonelectrostatic adsorption of hydrolysis products overlapping electrostatic adsorption was probably responsible for the nonequivalence of ion exchange reaction in which aluminum and manganous ions participated, it was extremely in la-terite systems due to its more content of iorn oxide; The realationship between amount of nonelectro-static adsorption and concentration of equilibrium solution conformed to the the Freundlish equation.

关 键 词：红壤 锰离子 吸附特征 非等当量交换 铝离子 水解产物 非电性吸附 

分 类 号：S153.3[农业科学—土壤学]