-]<Eads[As(V) 2-]. As a reference, the arsenic adsorption onto intrinsic phosphorene is reached with positive adsorption energies (stable adsorption) of 0.4, 0.6, and 1.1 eV for As(III), As(V) -, and As(V) 2-, respectively. Then, intrinsic phosphorene adsorbs arsenicals from aqueous sources with remarkable stability, as noted from previous experimental and theoretical studies .