“…Studies of determining the levels of risk elements on coal reclamations were also performed by Tang et al (2018), and the results have shown that the finer the texture of the soil is, the higher the heavy metal concentrations were. Other studies have dealt with risk elements all over the world, and, in some instances, elevated or high concentrations of elements such as arsenic (As), nickel (Ni), https://doi.org/10.17221/163/2020-SWR copper (Cu), lead (Pb), chromium (Cr), cobalt (Co), zinc (Zn), iron (Fe), manganese (Mn), cadmium (Cd), and mercury (Hg) were observed (Giri et al 2013;Bragina et al 2014;Ličina et al 2017;Bandyopadhyay et al 2018;Jambhulkar & Kumar 2019;Kalabić et al 2019;Raj 2019;Hamidović et al 2020). Štrudl et al (2006), on the other hand, based on a research from 116 sampling locations, stated that risk elements did not present a threat in the Sokolov mining basin in the Czech Republic.…”