DOI: 10.5593/SGEM2016/B32/S13.015


N. Junakova, J. Junak, P. Pohanka
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, 111-118 pp

Soils may become contaminated by the accumulation of heavy metals through emissions from the rapidly expanding industrial areas, mine tailings, disposal of high metal wastes, leaded gasoline and paints, land application of fertilizers, animal manures, sewage sludge, pesticides, wastewater irrigation, coal combustion residues, spillage of petrochemicals, and atmospheric deposit. Heavy metal contamination of soil may pose risks and hazards to humans and the ecosystem through direct ingestion or contact with contaminated soil, the food chain (soil-plant-human or soil-plant-animal-human), drinking of contaminated ground water, reduction in food quality (safety and marketability) via phytotoxicity, reduction in land usability for agricultural production causing food insecurity, and land tenure problems. The adequate protection and restoration of soil ecosystems contaminated by heavy metals require their characterization and remediation. A variety of techniques for soil remediation have been compiled and summarized.
This paper provides an evaluation of four physico-chemical soil remediation technologies according to the proposed model. The effectiveness of selected in situ (stabilization, chemical reduction, electrokinetic remediation) and ex situ (soil washing) remediation methods for heavy metal contaminated soils is examined based on chosen criteria such as performance, duration of treatment and costs of treatment calculated for volume unit. Conclusion of the analysis is evaluation of these remediation technologies and recommendations for their use in practice.

Keywords: heavy metals, ex situ methods, in situ methods

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