and 7.5 as well as three redox potentials of 400, 0 and− 100 Mv to investigate the influence
of redox potential and pH value on the La, Ce, Gd and Y release of from the simulated-REEs-
accumulation (SRA) soil. Oxygen and nitrogen were allowed to flow into soil suspension to
adjust redox potential to a preset value, and 1 mol/l HCl or 1mol/l NaOH solutions were
added into the soil suspension to keep pH at a preset value. Results indicated that La, Ce …