The Evaluation of Heavy Metal Pollution Degree in the Soils around the Zangezur Copper and Molybdenum Combine

Authors: K. A. Ghazaryan, G. A. Gevorgyan, H. S. Movsesyan, N. P. Ghazaryan, K. V. Grigoryan

Abstract:

The heavy metal pollution degree in the soils around the Zangezur copper and molybdenum combine in Syunik Marz, Armenia was assessed. The results of the study showed that heavy metal pollution degree in the soils mainly decreased with increasing distance from the open mine and the ore enrichment combine which indicated that the open mine and the ore enrichment combine were the main sources of heavy metal pollution. The only exception was observed in the northern part of the open mine where pollution degree in the sites (along the open mine) situated 600 meters far from the mine was higher than that in the sites located 300 meters far from the mine. This can be explained by the characteristics of relief and air currents as well as the weak vegetation cover of these sites and the characteristics of soil structure. According to geo-accumulation index (I-geo), contamination factor (Cf), contamination degree (Cd) and pollution load index (PLI) values, the pollution degree in the soils around the open mine and the ore enrichment combine was higher than that in the soils around the tailing dumps which was due to the proper and accurate operation of the Artsvanik tailing damp and the recultivation of the Voghji tailing dump. The high Cu and Mo pollution of the soils was conditioned by the character of industrial activities, the moving direction of air currents as well as the physicochemical peculiarities of the soils.

Keywords: Armenia, Zangezur copper and molybdenum combine, soil, heavy metal pollution degree.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1100298

References:

[1] S. Davydova, “Heavy metals as toxicants in big cities,” Microchemical Journal, vol. 79, no. 1-2, pp. 133–136, 2005.
[2] ISO 19258:2005, Soil quality - Guidance on the determination of background values, 2005.
[3] M. Friedlova, “The Influence of heavy metals on soil biological and chemical properties,” Soil and Water Research, vol. 5, no. 1, pp. 21–27, 2010.
[4] O. Mikanova, “Effects of heavy metals on some soil biological parameters,” Journal of Geochemical Exploration, vol. 88, pp. 220–223, 2006.
[5] Toxic metals in soil–plant systems, Ross S. M., Ed. John Wiley & Sons, Chichester, 1994.
[6] M. P. Benavides, S. M. Gallego, M. L. Tomaro, “Cadmium toxicity in plants,” Brazilian Journal of Plant Physiology, vol. 17, pp. 21-34, 2005.
[7] K. E. Giller, E. Witter, S. P. McGrath, “Toxicity of heavy metals to microorganisms and microbial processes in agricultural soils,” Soil Biology and Biochemistry, vol. 30, pp. 1389–1414, 1998.
[8] A. Waoo, S. Khare, S. Ganguly, “Unconventional plant-based remediation technologies for soil pollution at contaminated sites in Bhopal,” International Journal of Engineering and Advanced Technology, vol. 1, no. 1, pp. 41-44, 2011.
[9] Yu M., Tsunoda H., Tsunoda M. Environmental Toxicology: Biological and Health Effects of Pollutants, Third Edition. CRC Press, 2011.
[10] K. Ghazaryan, G. Gevorgyan, K. Grigoryan, “Evaluation of pollution level of soils of ecologically vulnerable areas around Agarak town and suggestion of improvement ways,” in Proc. 4th Int. Cong. EUROSOIL 2012 – Soil Science for the Benefit of Mankind and Environment, Bari, 2012, p. 2351.
[11] S. Caeiro, M. H. Costa, T. B. Ramos, “Assessing Heavy Metal Contamination in Sado Estuary Sediment: An Index Analysis Approach,” Ecological Indicators, vol. 5, pp. 151–169, 2005.
[12] J. L. Cheng, Z. Shi, Y. W. Zhu, “Assessment and Mapping of Environmental Quality in Agricultural Soils of Zhejiang Province, China,” Journal of Environmental Sciences, vol. 19, pp. 50–54, 2007.
[13] R. A. Edilyan, Atlas of Soils of the Republic of Armenia. Yerevan, 1990 (in Russian).
[14] L. Hakanson, “An Ecological Risk Index for Aquatic Pollution Control: A Sedimentological Approach,” Water Research, vol. 14, pp. 975–1001, 1980.
[15] D. C. Thomilson, D. J. Wilson, C. R. Harris, D. W. Jeffrey, “Problem in heavy metals in estuaries and the formation of pollution index,” Helgol. Wiss. Meeresunlter., vol. 33 no. 1–4, pp. 566–575, 1980.
[16] G. Muller, “Index of geoaccumulation in sediments of the Rhine River,” Geol. J., vol. 2 no. 3, pp. 108–118, 1969.
[17] K. O. Adebowale, F. O. Agunbide, B. Olu-Owolabi, “Trace metal concentration, site variations and partitioning pattern in water and bottom sediments from coastal area: A case study of Ondo Coast, Nigeria,” Environmental Research Journal, vol. 3, no. 2, pp. 46-59, 2009.