“…(Seidel, 1979). Ca was also lower in the uranium mine soils, indicating a loss at the beginning of the leaching process (Satybaldiyev et al, 2015), as well as in the subsequent H 2 SO 4 treatment of the by-products in the regeneration of the reagents (Na 2 CO 3 and NaHCO 3 or Glauber's salt and CaCO 3 ) (Suri et al, 2014). The higher percentages of Ti and Fe found in the uranium and copper mines are typical in these mining areas (Angileri et al, 2020;Liao et al, 2016) confirming their acid attack resistance in the leaching process, as in previous studies (Bowell et al, 2011).…”