本文研究铁键、铝键、钙键复合体与溶液中Ca2＋、Fe3＋、Al3＋金属离子的相互作用。结果显示，复合体上键合的Fe3＋，不能被溶液中的Ca2＋、Al3＋置换，复合体上键合的Al3＋仅少量被Fe3＋、Ca2＋置换进入溶液，复合体上键合的Ca2＋则可较多地被Al3＋、Fe3＋置换进入溶液，置换的量与pH及粘土矿物类型有一定关系，尽管复合体上键合的Fe3＋、Al3＋、Ca2＋等难以被置换，但溶液中的Ca2＋、Fe3＋、Al3＋等金属离子仍可与胶体络合。 In this paper, we study the interaction of iron, aluminum and calcium bonds with Ca2 +, Fe3 +, Al3 + metal ions in solution. The results showed that Fe3 + bound to the complex could not be replaced by Ca2 + and Al3 + in the solution. Only a small amount of Al3 + bonded to the complex was substituted by Fe3 + and Ca2 + into the solution. Ca2 + Is replaced by Al3 +, Fe3 + into the solution. The amount of substitution is related to pH and the type of clay minerals. Although the complexes such as Fe3 +, Al3 + and Ca2 + are difficult to be replaced, the metal ions such as Ca2 +, Fe3 + and Al3 + Still complex with colloids.