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Balaceanu C.-E.,National Research Development Institute for Soil Science
Journal of Environmental Protection and Ecology | Year: 2015

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. Source


Sirbu C.E.,National Research Development Institute for Soil Science | Cioroianu T.M.,National Research Development Institute for Soil Science | Rotaru P.,University of Craiova
Annals of the University of Craiova, Physics | Year: 2010

In this paper we investigate thermal behaviour of four samples of humic acids: two samples was prepared in laboratory and two samples were commercial humic acids. Thermal analysis measurements (TG, DTG, DTA and DSC) of humic acids were carried out in dynamic air atmosphere. On relate the thermogravimetric and enthalpic effects. Source


Cotet V.,National Research Development Institute for Soil Science | Dana D.,National Research Development Institute for Soil Science
Journal of Environmental Protection and Ecology | Year: 2012

The main objective of this paper was the evaluation of mineral nutrition of wheat in relation with the soil conditions of the Agricultural Research and Development Station (ARDS) Livada and Research and Development Station for Bovines (RDSB) Tg. Mures experimental plots. Wheat cultivars used were: Glosa, Gruia, Delabrad, Faur and Dropia, and the type of soil - Haplic luvisol. In order to evaluate the mineral nutrition of wheat plants analysis of macro- and micronutrients has been carried out in the ear emergence - flowering stage. The obtained data have been interpreted as being the optimum content of mineral nutrients mentioned in literature for these growing stages. Source


Monica S.-B.M.,National Research Development Institute for Soil Science | Stroe V.M.,National Research Development Institute for Soil Science | Rizea N.,National Research Development Institute for Soil Science | Musat M.,University of Agronomical Sciences and Veterinary Medicine
Romanian Biotechnological Letters | Year: 2015

Several digestion methods including the reverse of aqua regia and different combinations of concentrated acids (HCl, HNO3) were compared. Three acid digestion procedures were applied to certified samples to offer a proper method for determination of Zn, Cu, and Ni in soil samples. Two low pressure microwave heating programmes modified (nitric acid and Ultrapure water; nitric acid with clorhydric acid) and one procedure without pressure microwave (nitric acid with clorhydric acid and hydrogen peroxide) were tested in this study by using one standard reference material (Estuarine Sediment-1646) and ten soil samples. Short digestion time, less acid consumption, and high extraction efficiency were noted as the advantages of microwave digestion procedures. The concentration of three heavy metals (Zn, Cu, Ni) in soil samples was measured in three sampling sites of Romania, South- Eastern Romanian Plain, Central and Southern Dobrogea. The concentration of heavy metals was measured by using the atomic absorption spectrometry method and these concentration values were situated in normal limits for these chemical elements. In conclusion, to determine the total contents of heavy metals in soil samples studied, in principle any method of digestion carried out in a microwave oven can be used. © 2015 University of Bucharest. Source


Dana D.,National Research Development Institute for Soil Science | Cotet V.,National Research Development Institute for Soil Science | Anton I.,National Research Development Institute for Soil Science | Rizea N.,National Research Development Institute for Soil Science | And 2 more authors.
Journal of Environmental Protection and Ecology | Year: 2013

The main objective of this paper was to analyse soil solution sampled with a SDEC lysimeter and evaluation of mineral nutrition of wheat in relation with the soil conditions from the S.C. Agrotehnic S.R.L. Paulesti experimental plot. For analysis of soil solution taken by a SDEC lysimeter, soil solution was analysed in terms of reaction, electrical conductivity and anion and cation content. In order to evaluate the mineral nutrition of wheat plants, the analysis of macro- and micronutrients has been carried out in the ear emergence-flowering stage. Wheat cultivars used were: RENAN variety for consumption, and Apache and BOEMA varieties for seed. The obtained data have been interpreted as the optimum content of mineral nutrients mentioned in literature for these growing stages. Source

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