PHYSICOCHEMICAL PROPERTIES OF AQUEOUS SUSPENSIONS OF ULTRAFINE POWDERS OF METALLIC IRON

Using the methods of photocolorimetry, ion exchange and electron param agnetic resonance, the chemical state of iron ions in the aqueous phas es of suspensions of ultrafine iron powders was investigated. These po wders are promising as plant growth stimulants. By studying the redox potentials of the system, it was demonstrated that the transition of i ron into the solution depends on the acidity of the medium and the con centration of iron in the suspension.