PROCEDURE FOR OBTAINING HUMIC ACIDS WITH HIGH METAL ION COMPLEXATION CAPACITY AND PRODUCT OBTAINED USING SAID PROCEDURE

摘要

The invention provides a procedure for obtaining humic acids extracted from leonardites which have greater capacity to form complexes with metal ions, said procedure including selective activation, extraction and purification that increases the capacity of the complex-forming functional groups present in humic acids to form complexes with said metal ions. The procedure of the invention essentially includes a first molturation stage in leonardite liquid and two extraction stages based on a basic pH gradient.