DOI: 10.5593/SGEM2014/B52/S20.097


C. Popescu, F. Grecu, M. Niculescu
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-18-6 / ISSN 1314-2704, June 19-25, 2014, Book 5, Vol. 2, 735-742 pp

The studied land is located within the Northern part of Oltenia Region, between
mountains and SubCarpathian Hills that is firmly individualized by its characteristics. The Lafarge Cement Plant from Targu Jiu that is present within the area represents, along with Rovinari Power Plant, a source of high pollution in Gorj District. The presence of cement dust is evident within this area on either small or large areas in function of wind direction and other atmospherically conditions yet the soil pollution highly depends both by the distance from the pollution source and by the intrinsic characteristics of each soil type. Researching the soil properties inside this zone in dynamics, during 5 years, there were established 19 points from where there were taken soil samples on two depths, 0-20 and 20-40 cm. The points were located on both sides of the cement plant on the direction of the main air currents. The determinations allowed to establish the distance the cement dust is carried away, the most affected directions of cement dust transport as well as the changes the dust produces on soil properties. There can be observed that more obvious changes, due to cement dust pollution have been recorded with: soil reaction (pH values); the bases exchange capacity (BEC, me/100 g soil) and bases saturation degree (BSD, %), and less for the other chemical features. There can be observed that the highest influence of cement dust on soils was recorded around cement plant on a radius of approximately 3 km. In the W part the influence was recorded up to 15-20 km and in the eastern part, up to 5-8 km. Due to the fact that the studied area is complex as regard the soil types, in order to emphasize the influence of leaching and accumulation of cement dust there were made determinations into the area of maximal depositing.

Keywords: depresiune subcarpatică, praf de ciment, sol, profil de sol, poluare, pH, capacitate de schimb pentru baze, grad de saturaţie în baze