The paper reports on the interaction of an electric discharge with solutions of organic substances in the electric reactor with iron loading. A colored water solution of organic substances with well-studied properties such as methylene blue (MB), furatsilin and eosin is used. The chosen organic substances allow to demonstrate the redox reactions, destruction of organic substances and their adsorption. It is found out that the process of direct interaction of organic substances with the discharge is 40%. Efficiency of sorption processes on iron load depends on the properties of the dissolved organic substances and for the MB is 21%, for furatsilin is 42% and for eosin is 63%. Post-effects have been observed after the action of the discharges and have shown activity for 24 hours. The obtained results allow modeling the mechanism of transformation of complex organic compounds e.g. humic substances or oil products.