Efficient removal of arsenic by strategically designed and layer-by-layer assembled PS@+rGO@GO@FeO composites.

The PS@+rGO@GO@FeO (PG-FeO) hybrid composites for Arsenic removal were successfully fabricated and well dispersed using layer-by-layer assembly and a hydrothermal method. The PG-FeO hybrid composites were composed of uniformly coated FeO nanoparticles on graphene oxide layers with water flow space between 3D structures providing many contact area and adsorption sites for Arsenic adsorption. The PG-FeO hybrid composite has large surface adsorption sites and exhibits high adsorption capacities of 104 mg/g for As (III) and 68 mg/g for As (V) at 25 °C and pH 7 comparison with pure FeO and P-FeO samples.