Fig. 6From: Facile synthesis of reduced graphene oxide by Tecoma stans extracts for efficient removal of Ni (II) from water: batch experiments and response surface methodology3D response surface plots for Ni (II) removal using rGO with the interaction effects of (a) Ni (II) concentration (Conc.) x pH, (b) Dose x pH, and (c) Dose x Initial Ni (II) concentration (Conc.).Back to article page