LEAD POLLUTION OF SOILS LOCATED INTO THE INFLUENCE AREA OF THERMOELECTRIC POWER STATIONS DOICESTI AND ROVINARI

摘要

Some of the most complex polluters of the environment are thermoelectric power stations that are using coal as energy source. There are two types of environmental pollution sources: the main are baskets exhaust gases of coal combustion, so called high sources, and the secondary sources that are ash dumps resulted from the coal combustion activities, so called low sources. Thermoelectric power station Doicesti, located in the area of Sub-Carpathian hills, the Ialomila valley, is a major source of environment pollution with heavy metals, since 1952 when was built. By geographically point of view, the studied territory can be included into Sub-Carpathians Curvature, more specify in the Prahova Sub-Carpathian subunit. Pedogenesis factors: rock, topography and parent matherial, have led the evolution of isolated, lythomorphic soils. In the investigated territory four soil classes: Luvisols, Cambisols, Vertisols and Protisols were identified, each of them with types and subtypes mentioned in the paper. From a geomorphological viewpoint, thermoelectric power stations Rovinari belongs to the Calnic-Campul Mare inter-hilly depression whose altitude, at the Rovinari, is 150 m. The soil forming factors causing the soil evolution have been the rock, parental material and relief, all of them determining the evolution of lithomorphic zonal soils. The soils in the analysed area represented by the classes: luvisols, hydrisols, cambisols and protisols. The subject of this paper is to analyse the loading degree of lead of the soils affected by emissions from thermoelectric power stations Doicesti and Rovinari. Soil samples collected soil profiles distributed in all cardinal directions, were analysed for pH, lead contents. In the investigated area, lead pollution of soils, caused by lead emissions from thermoelectric power stations Doicesti and Rovinari, were recorded. The lead pollution phenomenon gathering way by changing the normal content of soil, plant, and consequently, could affect the health of the inhabitants of this territory.