Facile inverse micelle fabrication of magnetic ordered mesoporous iron cerium bimetal oxides with excellent performance for arsenic removal from water.

•Magnetic OMICs were successfully fabricated via a facile inverse micelle method.•Calcination temperature affected the structure property and surface chemistry of OMICs.•OMIC-3 exhibited excellent performance for As(III) and As(V) removal from water.•HA significantly influenced on the arsenic removal even at a lower concentration.•Surface hydroxyl groups played a key role in the arsenic adsorption mechanism.