Modelling of uranium release from waste rock pile

Abstract

Abstract. Uranium release/uptake on material of waste rock pile No. 66 at Schlema-Alberoda (Saxony, Germany) was studied by both static (batch) and dynamic (column) experiments with the aim to obtain input data for modelling of uranium migration in the pile. Most of the experiments were carried out by radiotracer method using 233 U as the label. An ambiguous influence of humic acid (concentration 10 and 50 mg/L) on the migration of uranium was observed. The column elution experiments were modelled using PHREEQC that enabled to respect the kinetic character of the desorption process.

Uranium, Mining and Hydrogeology

“…It was interpreted as the transformation of HSO 4 to SO 4 2and desorption of H + from positively charged surface sites initialised after injecting of two pore volumes (PV). Vopalka et al 2006). Solution in outlet cell 1 Horizontal 35 S PCW PCW 2 Horizontal 35 S ATS PCW 3 Horizontal 3 H PCW PCW 5 Vertical 35 S PCW PCW 6 Vertical 35 S ATS PCW 7 Vertical 3 H PCW PCW through-diffusion experiment results also for variable tracer activity in the inlet cell (e.g.…”

“…This approach that determines so called exchangeable or "labile" (Davis and Curtis, 2003) uranium U ex was with a success used for the determination of exchangeable uranium on the material from the waste rock pile at Schlema-Alberoda, Saxony (Vopalka et al, 2006). This approach that determines so called exchangeable or "labile" (Davis and Curtis, 2003) uranium U ex was with a success used for the determination of exchangeable uranium on the material from the waste rock pile at Schlema-Alberoda, Saxony (Vopalka et al, 2006).…”