ABSTRACT
Two outlines of experiments were realized: 1) interaction of the same water with the rock during various time frames and 2) 5-fold treatment of the rock by fresh aliquots of water during a week. In both cases bidistilled water in equilibrium with atmospheric CO2 (pH 5.8) was used as an analogue of rainwater. Ratio of the masses of rock and water (r/w) was 1/2 and 1/10 in both series. The experiments were fulfilled in closed plastic vessels at 22-24°C. After the experiments, water
1 INTRODUCTION
Experimental investigations in geoecology are usually conducted with water and primary contaminating materials-ores, tailing, and so on (Zosin et al. 2003). New forms of contaminating materials are formed as a result of reactions of contaminated water with surrounding rocks. These secondary forms determine in the end the spreading rate of hazardous elements (Alekseyev et al. 2010) i.e. elements with established maximum permissible concentrations (MPC).
