Electroseparation of zinc from two soils samples by using of a laboratory installation, in which metal is accumulated in a supported tuff layer, is presented in this paper. Optimum parameters for the treatment of soil-supported tuff systems by electroremediation process were: voltage 25 V, current 48-69.5 mA, pH 2.1-3.8 at anode and 5.5-6.5 at cathode, pH of supported tuff 5.4-6.5, samples humidity 29-31.5%. Efficiencies for zinc retaining in supported volcanic tuff mass from soil sample containing 186 mg/kg d.s., were 65-72.3%, after 72 hours. Analysis of metal concentrations evolution versus time, showed the existence of a homogeneous electromigration process.
In phytoremediation process of soils polluted with heavy metals, the use of amendment with different types of fertilizers and biosolids, will increase process efficiency. Uisng of fertilizers assure nutrients for plants, and increases the acces of metals to their aerial parts, and bioaccumulation above allowable limits. Amendement consisting of native volcanic tuff, with high clinoptilolit content, modified by supporting with Al13 polimers, decreased zinc bioavailability about 1.4 - 2.1 times and that of cadmium 1.4 - 3.8 times, in aerial parts of Vicia sativa plant, in first weeks of vegetation. Uisng of pillared zeolite produced advanced decreasing of cadmium access in Vicia sativa roots, and as a consequence a decreasing in aerial parts of plant during advanced vegetation period.