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为探讨表生吸附作用富集成含锡矿深层的可能性,选用Fe_2O_3、MnO_2、木炭和蒙脱石等10种吸附剂进行了锡的吸附实验。实验表明,这些吸附剂均能从极稀薄的溶液中吸持锡离子,其吸附率通常在50％以上。其中以木炭、Fe_2O_3和MnO_2的吸附性最好。在强酸、强碱性条件下,锡离子在溶液中趋于稳定;而在中到弱碱性条件下容易被吸附。因此,富含炭、铁、锰和其他矿物胶体的沉积物,可使锡从极稀薄的溶液中沉淀下来,局部富集成矿源层。
In order to investigate the possibility of epigenetic adsorption enrichment into deep tin-bearing deposits, 10 adsorbents, such as Fe 2 O 3, MnO 2, charcoal and montmorillonite, were selected to study the adsorption of tin. Experiments show that these adsorbents are able to pick up tin ions from very thin solutions, with adsorption rates typically above 50%. Among them, charcoal, Fe 2 O 3 and MnO 2 were the best adsorbents. In strong acid, strong alkaline conditions, tin ions in solution tends to be stable; in the medium to weak alkaline conditions easily adsorbed. Therefore, sediments rich in carbon, iron, manganese and other mineral colloids can precipitate tin from extremely lean solutions and locally enrich the source rocks.