LAUSR

Abstract In this paper, diatomite/nano titanium dioxide composite (DNTD) was used as adsorbent to remove iodate from aqueous solution under different conditions. The maximum distribution coefficient could be up to 370 mL g −1 in acidic environment. The sorption speed is very fast and satisfies the pseudo-second-order equation. The sorption isotherm is well described by the Freundlich model. The sorption process is spontaneous and exothermic. Iodate was adsorbed by the silicon hydroxyl group of DNTD according to the characterization results. DNTD is a promising material for the treatment of iodine pollution in the environment. Graphic abstract The diatomite/nano TiO 2 composite has a complex pore structure. It adsorbs iodate quickly and efficiently. Iodate is adsorbed by the Si–OH group and reduced under the catalysis of nano TiO 2 . It has great potential in the treatment of iodine pollution.