COMPLEX-FORMING OF SILVER(I) WITH HUMUS A CIDS AND THE GEOCHEMICAL ROLE OF THUS PROCESS

The comples forming of silver(I) ion with the fulvoacids extracted fro m the natural waters is studied by use of solubility method. The compo sition of the corresponding complexes is determined and stability cons tants of silver(I) fulvate complexes at 6,4 and 8,0 pH-values are calc ulated. It is shown that the solubility of thindispersed elemental sil ver increases with the increase of fulvoacid concentration. In general the interaction of silver(I) ions and elemental silver with the fulvo acids leads to the increase of silver migration ability in the zone of hypergenic processes. The sorption of silver(I) ions by the humine ac id extracted from peat is studied. The humine acid is shown to have hi gh capacity in relation to silver(I) ions and is concerned as a substa ntial natural complexforming sorbent.