Adsorption study of anionic reactive dye from aqueous solution to Mg-Fe-CO3 layered double hydroxide (LDH)

► Mg-Fe-CO3-LDH was utilized as an adsorbent. ► It was used for the removal of congo red (CR), an anionic dye from aqueous solution. ► The adsorption of (CR) is endothermic. ► The adsorption equilibrium was well described by the Langmuir isotherm model. ► Adsorption kinetics of (CR) was found to conform to pseudo-second order model.