Kinetics and equilibrium studies on the treatment of nitric acid with Mg-Al oxide obtained by thermal decomposition of NO3--intercalated Mg-Al layered double hydroxide

► Mg-Al oxide could treat HNO3, acting as both a neutralizer and fixative for NO3-. ► The NO3- removal increased with time, Mg-Al oxide quantity and temperature. ► The NO3- removal by Mg-Al oxide proceeded under chemical reaction control. ► The adsorption isotherm could be expressed by Langmuir type.