从褐煤抽提得到的腐植酸与阳离子相互作用的研究表明,Mg~(2+)、Ca~(2+)、Zn~(2+)、Cu~(2+)、Al~(3+)和Fe~(3+)与腐植酸形成络合物。对这些阳离子,Fe~(3+)具有最大的形成络合物倾向。吸留能力按这样的顺序,Fe~(3+)>Al~(3+)>Cu~(2+)>Zn~(2+)>Ni~(2+)>Co~(2+)>Mg~(2+),值得注意的是表现优先吸收的阳离子是以酸度增加为基础的。最前面的阳离子有最大的酸度。 The study on the interaction between humic acid and cation obtained from extraction of lignite showed that Mg 2+, Ca 2+, Zn 2+, Cu 2+, Al 3+, And Fe ~ (3+) form a complex with humic acid. For these cations, Fe ~ (3+) has the largest tendency to form complexes. In this order, Fe 3+> Al 3+> Cu 2 + Zn 2 + Ni 2+> Co 2+ + Mg 2+, it is noteworthy that the performance of preferential absorption of the cation is based on increased acidity. The first cation has the largest acidity.