红壤对铝、锰离子的吸附特征Ⅱ铝、锰离子的非电性吸附  

EXCHANGE-ADSORPTION CHARACTERISTICS OF ALUMINUM AND MANGANOUS IONS BY RED SOI LS Ⅱ. NON-ELECTROSTATIC ADSORPTION 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》2003年第4期562-566,共5页Acta Pedologica Sinica

摘　　要：对铝、锰离子的非电性吸附进行了Freundlish方程处理 ,结果表明 :砖红壤中的吸附较红壤明显 ,低浓度时 ,锰离子的非电性吸附较铝离子为弱 ,高浓度时则反之 ;对于土壤的离子交换吸附 ,似不可能获得稳定的平衡常数k ;K表征离子的吸附强度 ,以膨润土中者最大 ,1/n是吸附量与溶液浓度的相关率 ,K和 1/n成反相关。砖红壤中的ΔGo 最大 ,铝、钾离子交换的ΔGo 大于铝、钙离子交换者。非电性吸附量及与其有关的k、K、1/n和ΔGo 既受固相表面性质的影响 。Exchange-adsorption of aluminum and manganous ions by red soils cont inued being studied. It was shown that the nonelectrical adsorption of aluminum and manganous ions was related to either adsorption capacity of solid phase or a dsorption intensity of ion; For the ion exchange reaction in soils, it seemed im possible to obtain equilibrium constant k; K and 1/ n were also not fixed values; The change in standard free energy Δ G o of exchange-adsorption b etween aluminum and potasium was greater than that between it and calcium, it wa s also the greatest in laterite system. Changes in k, K, 1/n and Δ G o were affected both by the property of solid phase surface and by the nature of i on itself.

关 键 词：红壤 铝离子 锰离子 吸附特征 非电性吸附 平衡常数 标准自由能 

分 类 号：S153.3[农业科学—土壤学] S155.25[农业科学—农业基础科学]