The freeironoxide content in clay in every mountain is higher in the mountain yellow soil than that in the mountain latored soil and mountain red soil.
粘粒的游离氧化铁含量，每个山体均是山地黄壤高于山地红壤和山地赤红壤。
2
The paper illuminates the existing state of freeironoxide in red clay in the view of collochemistry, pointing out the interaction mechanism between them is the adsorption of collochemistry;
从胶体化学的角度阐明游离氧化铁在红粘土中的赋存状态，指出它们之间的相互作用机理是胶体化学吸附作用；
3
The assumption is made that if there is no detectable freeiron, the metal surface is clean enough for a uniform oxide film to develop.