In the present study, a holey graphene oxide (HGO) was synthesized via fast-designed method for preparing HGO. The synthesized adsorbents were characterized by Fourier transform infrared spectroscopy. A simple adsorption method was designed for the removal of La (III) and Ni (II) by the utilization of HGO. The adsorption rate of La3+ progressively reached its maximum at 5 min and high adsorption N...