Carbonated ferric green rust as a new material for efficient phosphate removal

► Ferric green rust is prepared by varying two synthesis parameters. ► Size, morphology and cristallinity of ferric green rust can be controlled. ► The adsorption kinetics data can be fitted to a pseudo-second order model. ► Freundlich model provides the best correlation for sorption isotherms. ► The highest adsorption capacity is 64.8 mg g−1 at pH = 4.