One of the heavy metals immobilizing methods, apart from the conventional methods such as liming and organic fertilization, is the usage of unconventional binding agents. Modified alluminiumsilicates, such as Al-montmorillonite and Polynuclear aluminium form (Al₁₃⁷⁺) offer some promising results. The main goal of this work was to evaluate the influence of the used mineral sorbents: sodium silicate and modified aluminium silicates compounds on single fractions of cadmium and zinc content changes in the soil under heavy wheat. The experiment’s scheme included 18 scenarios (A) and two plant development stages (B) within two repetitions. Scenarios (A) of the experiment were created by the insertion of soluble zinc and cadmium salts, as well as the immobilising agents into the chosen pots. The Al₁₃ addition at the level I proved to be most effective in decreasing the contents of mobile cadmium forms in the soil environment. Whereas, the addition of Al₁₃ at the level II and Al-montmorillonite, instead of the expected cadmium immobilization, boosted the mobility of this element’s ions in the soil.
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