DBPapers
DOI: 10.5593/SGEM2016/B32/S13.040

RISK ASSESSMENT ASSOCIATED WITH A SULPHIDE-BEARING WASTE-ROCK DUMP FROM NE ROMANIA

M. Paiu, O.G. Iancu, I.G. Breaban
Wednesday 7 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-62-9 / ISSN 1314-2704, June 28 - July 6, 2016, Book3 Vol. 2, 303-310 pp


ABSTRACT

Controlling land resources is an anthropic activity economically profitable and provides raw materials for many industries. An activity related to exploitation of mineral resources which has a significant environmental impact is the storage of waste mine rocks.
Environmental impact assessment is based on mineralogical characteristics of the waste rock deposits, migration and accumulation of pollutants in the environment by interpreting the analysis of sterile samples taken from deposits. Assessing impacts from landfill mining is done by comparing the result of analyzes carried out with maximum allowable concentrations standardized in legislation.
The present study was performed on the Holda mine dump situated in the Bistrița Hydrographic Basin from Eastern Carpathians in Romania. 17 samples of waste rock were analyzed by LA-ICP-MS for potentially toxic metals in the environment (As, Cd, Cr, Cu, Pb and Zn).
Analysis and evaluation of environmental risks was achieved by applying the geoaccumulation index (Igeo), pollution index (PI), Nemerow integrated pollution index (NIPI) and the Hakanson potential ecological risk index (PERI).
According to the Igeo, the main contaminants of the analyzed samples are As, Zn and Pb. The results of PI and NIPI show that As, Zn and Pb belong to the high and very high level of pollution classes. The PERI for each element revealed the following order: ER(As) >ER(Pb) >ER(Cd) >ER(Zn) >ER(Cu) >ER(Cr). 65% of the samples fall in the very high ecological risk with only 29% being in the low ecological risk.

Keywords: risk assessment, pollution index, Hakanson potential ecological risk index

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