Geochemical investigations of potentially toxic trace elements in urban Sediments of Idrija
AbstractUrban areas and associated human activities (industry, traffic, processes of mining and ore extracting, etc.) have induced anthropogenic emissions of potentially toxic trace elements (PTTE), which can present risk to living organisms and ecosystems in case of enriched levels. An example of such area in Slovenia is the Idrija town, the central part of the second largest Hg mining district in the world, which is heavily contaminated with Hg in all environmental compartments. The knowledge about levels and distribution of other PTTE in Idrija is very limited due to the outstanding Hg related problems. In this study the geochemical investigation of PTTE (As, Cd, Co, Cr, Cu, Mo, Ni, Pb and Zn) was performed in urban stream and road Sediments of Idrija town for the first time. In addition, solid phases of PTTE were observed using SEM/EDS and their potential sources were assessed. The results show that the levels of PTTE in urban stream and road Sediments are mostly below international guidelines, except for Cu some high values were measured in road sediments. The highest Cu level was determined in the vicinity of a commutator production industry. The associations of Cu with other elements in solid phases are very diverse, which is why the analyses could not reveal the specific source of high Cu levels.
How to Cite
Bavec, Špela. (2015). Geochemical investigations of potentially toxic trace elements in urban Sediments of Idrija. Geologija, 58(2), 111–120. https://doi.org/10.5474/geologija.2015.009