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Articles by Stela JELEA
Total Records ( 3 ) for Stela JELEA
  Gabriela Oprea , Angela Michnea , Cristina Mihali , Marin Senila , Cecilia Roman , Stela Jelea , Claudia Butean and Cristian Barz
  Problem statement: The objective of this research was to evaluate the degree of soil contamination with arsenic and antimony in Baia Mare, a nonferrous mining and metallurgical center located in the North West region of Romania. The soil in the area is affected by the emissions of powders containing metals from metallurgical factories. Previous studies indicated the soil contamination with copper, zinc, cadmium and lead, but there is few data about the actual level of soil pollution with arsenic and antimony. Approach: The soil samples were collected from 2 districts of Baia Mare: Ferneziu, which is located in the proximity of a lead smelter and Săsar district which is located along the Săsar River in the preferential direction of the wind over a metallurgical factory producing lead. As reference was considered Dura area located in a less polluted hilly area, in the west part of the town. Samples of soil and plants from the residential area of Ferneziu, Săsar and Dura districts were collected. The arsenic determination was carried out by inductively coupled plasma atomic emission spectrometry and the antimony determination by inductively coupled plasma mass spectrometry. Results: In Ferneziu area, the concentration of arsenic in soil ranged between 0.25 and 255 mg kg-1. In Săsar district the arsenic concentration in the soil ranged between 5.5 and 295 mg kg-1. Regarding antimony, in Ferneziu area the concentration ranged between 5.3 and 40.6 mg kg-1; while in Săsar, antimony soils concentrations vary in the range: 0.9-18.4. Arsenic and antimony concentrations in plants were low for almost of the samples, both in Ferneziu and Săsar area indicating a low mobility of these elements in the studied soils. Conclusion: This study indicated the soil pollution with arsenic both in Ferneziu district and in Săsar district. The soil pollution with antimony was found especially in Ferneziu district.
  Zorica VOSGAN , Roxana VIDICAN , Stela JELEA , Monica MARIAN , Lucia MIHALESCU and Oana MARE ROSCA
  This study has been carried out in a pastoral area of Maramures County, on the south-estic slope of Gutai Mountain, where it is situated the pasture for the ovines and caprines of the inhabitants of the surrounding villages. It has been identified in this area a districambosol soil characterized by high acidity, a composition rich in nitrogen and humus due to slow humification, moderate reserves of potassium and phosphor. The assay indicates a clayey composition except for the At horizon which has a composition predominant in fine sand. In order to increase the value of the pasture, improvement and maintainance works should be performed.
  Zorica VOSGAN , Roxana VIDICAN , Monica MARIAN , Lucia MIHALESCU , Stela JELEA and Oana MARE ROSCA
  This study aims to investigate and identify plant species on the village common grazing Surdesti, located at 760 m altitude in the foothills south west of Gutai Mountains in northwestern Romania. Green growth of plants and animals is the main activity of the inhabitants of this area and food production is made using environmentally friendly technologies and natural life cycle of the ecosystem. It is important to know the qualitative composition of grassland vegetation as the main source of feed for cattle, sheep, goats.
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