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Registration Number

0207U005540, 0106U005631 , R & D reports

Title

Monitoring of Sukhachivskeh tailings storage condition and its impact on the environment

Head

Tarkhin Yuriy,

Registration Date

27-04-2007

Organization

Ukrainian Scientific Research and Disign Institute for Industrial Technology

Description

Subject of the research is Sukhachivskeh tailings pond that belongs to Pridneprovsky Hydrometallurgical Plant and is intended for uranium ore milling and chemical production waste storage. The objective of the work is Sukhachivskeh tailings pond condition and its surrounding environment monitoring. The aim of the monitoring is the tailings pond technical condition and its environmental impact parameters assess-ment. The research effort was performed in four areas: the tailings pond protecting barriers condition as-sessment according to engineering-geological survey and instrumental observation in 2006; soil contami-nation assessment in the area of the tailings pond in 2006; the tailings pond water and fillup balance in 2006; assessment of changes in the regional hydrogeological conditions under the tailings pond impact in 2006. The research technique is stationary observations for the controlled parameters changing. As a result of the engineering-geological survey, changes in appearances of unfavorableengineering-geological proc-esses were observed on the surface and in the bodies of the protecting barriers (gullies, outlets, subsided and watered plots). From the instrumental geodesic measurements, the values of X-shifts and vertical sub-sidence of deformation marks were determined, their changes were considered, continuous character of deformations was revealed. From the sampling data and laboratory research in the soils of the tailings pond sanitary protection and control areas, the contents of easily soluble salts, heavy metals, natural ra-dionuclides of uranium series were defined, the level of their contamination was assessed, the conclusions made before were substantiated concerning presence of increased concentrations of natural radionuclides and chemicals as well as the conclusion about the tailings pond as a source of soil contamination. From the measurements and calculations, the marks and volumes of the tailings pond fillup with water and slurry, the parameters of inflowing and outflowing constituents of the tailings pond water balance were evaluated. From the research results, there was substantiated the tailings pond impact on the underground water hydrodynamic and hydrochemical regimes in the area adjacent to its contour where the contents of components indicating contamination exceeds their background values and maximum permissible concen-tration (MPC). The range of these components and contamination borders as well as time changeability in content of components indicating contamination were specified. The results of observations prove the fact that slime water from the second section of the tailings pond filtrates to the body of dam at the local plot. As a consequence of observations and laboratory research, the tailings pond gets characteristics as a source of negative impact on the local environment.5635

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