Adsorption of Eu(III) on defective magnetic FeNi/RGO composites : effect of pH, ion strength, ions and humic acid

摘要

The defective magnetic iron–nickel–graphene (FeNi–RGO) complexes were synthesized for investigating the adsorption of Eu(III) ions from aqueous solutions as a function of pH, solid-to-liquid ratio, ion strength, anions, cations and humic acid (HA). The adsorption of Eu(III) on FeNi–RGO was significantly dependent on pH and weakly dependent on ionic strength, anions and cations. HA could promote the adsorption of Eu(III) on FeNi–RGO at low pH while inhibited that at high pH with depending on the HA concentration. The results of this work were helpful for extraction and separation useful radionuclides from radioactive wastewater.