The Effect of Vacuum Annealing of Magnetite and Zero-Valent Iron Nanoparticles on the Removal of Aqueous Uranium

Table 2

Concentrations of notable chemical species present in the mine water, analysed by ICP-MS (U), ICP-AES (Fe, Mg, Cu, and Mo), volumetric titration (HCO₃⁻, NO³⁻, and PO₄³⁻), gravimetry (SO₄²⁻), and solvent extraction (organics) along with the recorded Eh, pH, and DO prior to nanoparticle addition.

Chemical species	Concentration (mg L^−1)
Metals
Cu	0.023
Fe	0.018
Mg	15.02
Mo	0.045
U	0.484
Ligands
HCO3^−	1041.10
NO3^−	30.80
PO4^3−	0.35
SO4^2−	0.25
Organics	12.72
Solution conditions
DO (mg L^−1)	13.4
Eh (mV)	215
pH	8.36