In this study, waste rock of iron ore mine (metasomatic rocks) has been modified and utilized as a sulfate adsorbent to enhance sulfate removal from contaminated aqueous solution. The modification generating from the assembly of Mg-Al and Ni-Al layered double hydroxides and metasomatic rocks. The sulfate adsorption onto both adsorbents was performed favorably as a monolayer adsorption in homogeneous condition. The kinetic studies identify the chemisorption mechanism of sulfate adsorption process onto both adsorbents with the combination of the film-mass transfer and internal diffusion. Thermodynamic studies indicate that sulfate adsorption process onto both adsorbents was exothermic and spontaneous.