DBPapers
DOI: 10.5593/SGEM2015/B32/S13.021

GEOCHEMICAL DISTRIBUTION OF SOME POTENTIALLY TOXIC TRACE ELEMENTS IN SOIL CONTAMINATED BY MINING ACTIVITY IN SUCEVA COUNTY,ROMANIA

S. Iftode, R. Huzum, D. S.A Sirbu-Radasanu, N. Buzgar
Thursday 24 September 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-37-7 / ISSN 1314-2704, June 18-24, 2015, Book3 Vol. 2, 153-160 pp

ABSTRACT
The potentially toxic elements (PTE) derived from the mining activities constitute the main cause of serious ecological problems. Specifically open cast mining activities have a serious environmental impact on soil. The toxicity and the mobility of trace elements (TE) in soil depends not only on the total concentration but also on their specific chemical forms, their binding state, the metal properties, environmental factors and soil properties as pH and organic matter content. The current study was conducted on a series of 34 soil samples, collected from the Manaila ore deposit, Suceava county, North-East of Romania. The metal ores extracted from this area are: pyrite (FeS2), chalcopyrite (CuFeS2), blende (ZnS) and galena (PbS). Soil samples were collected from the upper part of the ore as well from the plant root zones. The main objective of the present study was to determine the contents and distribution of trace elements (TE) (Co, Cr, Cu, Cd, Pb, As) from soil surrounding the mine area using energy-dispersive X-ray fluorescence spectrometry (ED-XRF). The results show that the TE contents exceed the normal reference value according to the Romanian legislation established by Order no 756/1997 of the Romanian Ministry of Waters, Forests and Environment Protection (MAPPM). The higher concentration of TE in soil samples reach to 24.1 mg·kg-1 for Co, 51 mg·kg-1 for Cr, 92 mg·kg-1 for Cu, 151 mg·kg-1 for Pb, and 24.7 mg·kg-1 for As. The pH was determined in aqueous solution and obtained data describe a soil reaction from moderately acid (5.11) to weak acid (3.07). For the assessment of contamination the geoaccumulation index (Igeo) and enrichment factor (EF) were calculated. The Igeo denotes a moderately to heavily contamination (2

Keywords: PTE, pH, enrichment factor, Igeo, XRF

PAPER DOI:10.5593/SGEM2015/B32/S13.021, Title: GEOCHEMICAL DISTRIBUTION OF SOME POTENTIALLY TOXIC TRACE ELEMENTS IN SOIL CONTAMINATED BY MINING ACTIVITY IN SUCEVA COUNTY,ROMANIA

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