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腐殖酸是沉积有机质的主要成分。实验证明，腐殖酸对铅锌离子具有强烈的富集能力。通过替代反应初步确定了腐殖酸与Ｐｂ、Ｚｎ之间几种结合方式及各种结合方式所占数量和比例；证实富啡酸（Ｆ．Ａ．）和胡敏酸（Ｈ．Ａ．）与Ｐｂ￣（２＋）、Ｚｎ￣（２＋）之间形成了两大类络合物：一类其稳定常数小于ＥＤＴＡ－Ｐｂ（Ｚｎ）络合物；另一类稳定常数大于ＥＤＴＡ－ｐｂ（Ｚｎ）络合物。根据Ｆ．Ａ．与Ｚｎ￣（２＋）反应过程中氢离子释放量，可估算络合物生成量；溶液ｐＨ值及成熟程度，对有机质结合Ｐｂ（Ｚｎ）的能力有重要影响。溶解有机质、腐殖酸和单宁酸的存在对方铅矿晶面发育具有控制作用。
Humic acid is the main component of organic matter deposition. Experiments show that humic acid has a strong enrichment of lead and zinc ions. By means of the substitution reaction, the number and proportion of the various combinations of humic acid and Pb and Zn and the proportions and proportions of the various combinations were determined. It was confirmed that F.A. and H.A. There are two types of complexes formed between Pb 2+ and Zn 2+: one is less stable than EDTA-Pb (Zn) complexes; the other is more stable than EDTA-Pb ) Complex. According to F. A. And Zn ~ (2+) reaction process of hydrogen ion release can be estimated complex formation; pH value and degree of maturity of the organic matter, the ability of the combination of Pb (Zn) has an important impact. The presence of dissolved organic matter, humic acid and tannic acid has a controlling effect on the galena growth.