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黑土、灰褐土与红壤等土壤胶体都有吸附两性胶体蛋白质的能力。吸附蛋白质的数量与土壤胶体中粘土矿物的组成有关,2:1型大于1:1型,也与粘土矿物上负电荷数量有关,负电荷愈多,吸附愈多。斑脱土对明胶的吸附是一种难于可逆的交换吸附,也可能有非极性的吸附。蒙脱胶体吸附明胶时,既有外表面的吸附,又有内表面的吸附。内表面吸附量易受作用条件的影响。蒙脱吸附明胶可形成憎水性的微团聚体,促使其X射线衍射强度降低。
Soil colloids, such as black soil, gray-brown soil and red soil, have the ability to adsorb amphoteric colloidal proteins. The amount of adsorbed protein is related to the composition of clay minerals in soil colloids. The 2: 1 type is larger than the 1: 1 type and is also related to the amount of negative charge on clay minerals. The more negative charges, the more adsorption. Sorption of gelatin by bentonite is a reversible exchange sorption and non-polar sorption. Montmorillonite gelatin adsorption, both the outer surface of the adsorption, but also the inner surface of the adsorption. The amount adsorbed on the inner surface is susceptible to the action conditions. Montmorillonite adsorption of gelatin can form hydrophobic micro-aggregates, to promote the X-ray diffraction intensity reduction.