Application of EDTA, succinic acid in the course of phytoextraction of nickel and cadmium from the polluted soils

The study considers the possibility of using eth-ylene diamine tetraacetic and succinic acids in the course of phytoremediation of the soils polluted by nickel and cadmium. The research objective was the assessment of influence of ethylene diamine tetraacetic and succinic acids on the process of phytoextraction of nickel and cadmium. For the as-sessment of influence of succinic and ethylene diamine tetraacetic indicators of morphometric pa- rameters (the length of escape and the main root) of 21-days sprouts of plants of colza of the grade Nadyozhny-92, mustard of the grade Semenovskaya, vegetable biomass and a relative indicator, i.e. phytotoxic effect in the conditions of laboratory and vegetative experiments were used. As a result of carrying out researches it was re-vealed that on the soil polluted by cadmium with addition of ethylene diamine tetraacetic acid the length of shoots of mustard increased by 15 %, the length of the main root increased by 13 %. In the option with entering into the soil polluted by cadmi-um of amber acid the increase in indicators of length of and the main root of colza by 20 % was observed. With application of effectors of phytore-mediation the increase in indicators of biomass to 22 % was observed. The coefficient of phytotoxic effect characterizing the share of decrease in bio-mass of the plants grown on the polluted soil con-cerning the biomass of the plants which were grown on conditionally pure soil shows the reduc-tion of toxic effect of cadmium and nickel in plants when entering into the soil of ethylene diamine tetraacetic and succinic acids. Thus, at cultivation of mustard on the soil polluted by cadmium it is most expedient to use ethylene diamine tetraacetic acid as a phytoremediation effector, and at pollu-tion of the soil nickel to use amber acid. At cultiva-tion of colza in the conditions of pollution of the soil cadmium to apply succinic acid, in the conditions of pollution of the soil nickel ethylene diamine tetraacetic acid is more effective.