| 摘要 |
<p>The invention relates to chemistry, in particular to methods for exuding humic substances (in the form of acids and their salts) from natural humified materials. The inventive method for exuding the humic substances from the natural raw material consists in treating the humified materials with an alkali solution at standard conditions. Said treatment is carried out at presence of carbamide and complexon. Moss peat and transition peat or sapropel or the humus horizon of various soils can be used for carrying out the inventive method. The alkali solution can contain the carbamide and complexon at the following component ratio: carbamide:complexon =1.0: (1.0-5.0): (0.1-2.5). In a preferred embodiment, ethylendiaminetetraacetic acid (trilon B) is used as complexon.</p> |
