In this study we tested the dissolution kinetics of three garnierite types (serpentine-, talc- and sepiolite-dominated) at pH 3 5 room temperature by means flow-through experiments. The samples selected for cover a wide range mineralogical composition (Xtalc, between 0.34 0.78) Ni content (between 0.8 2.4 atoms per formula unit Ni). variation in output concentrations Ni, Mg Si over time showed ...