Gigiena i sanitariia
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Gigiena i sanitariia · Jul 2009
Comparative Study[The content of toxic trace elements in the conjugate media].
The purpose of this study was to make a qualitative and quantitative analysis of the content of toxic trace element (Pb, Co, Ni, Cd, Ni, Cd, Sr, and Cr) in the deposited media (snow cover, soil) and drinking water and to define the relationship of the levels of elements in the snow-soil and soil-water systems. The analysis was made in the economic (eastern, western, and central) areas of the region. The higher levels of metals were recorded in the snow cover and soil of the eastern area, which was caused by a high man-made load. ⋯ The average level of trace elements in the drinking water was not greater than the maximum permissible concentration in the whole region. The summary pollution index in the drinking water was higher in the western area. It should be noted that the western area showed the largest number of direct correlations with the content of elements in the soil-water system: Pb (r = 0.99), Co (r = 0.84), Ni (r = 0.38).
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Gigiena i sanitariia · Jul 2009
[Assessment of human health risk upon acute inhalational exposure to chemical substances].
To provide the safety of the population and environment with the occurrence of man-caused catastrophes due their increase is now an urgent problem. Toxic hazard coefficients were calculated for hydrogen sulfide in the settlements located in a possible chemical pollution area in the Orenburg gas-chemical complex. Assessment of the hazard of toxic effects to the population upon exposure to hydrogen sulfide has indicated that there may be toxic effects in the inhabitants of the study nearby inhabited localities. The findings do not characterize the possible severity of intoxication so it is necessary to develop a system of criteria for the differentiation of the severity of negative effects in order to evaluate the hazard of acute chemical exposures.