Hence, the reusability was investigated considering the hydroxide anion (OH -) adsorption as eluent. Fig. shows that the hydroxide anion (OH -) competitiveness with the arsenic species is much higher (Eads=2.91 eV) given its strong stabilization by polarization effects with phosphorene oxide (see Table ) and displaying an intermolecular length of 1.7 Å. The latter prevents the adsorption of arsenic species by repulsive electrostatic interactions with the adsorbent surface in alkaline conditions. Additionally, the results indicate that phosphorene oxide makes easier the regeneration with alkaline eluents increasing the stabilization by ~20% compared with the affinity of intrinsic phosphorene with hydroxide anions. In other words, the regeneration of adsorbent is allowed by inexpensive alkaline reagents such as sodium hydroxide solution, i.e., through suitable modifications operating settings, such as pH conditions. In addition, also it has been demonstrated that a 1,2ethanedithiol (EDT) treatment is a simple and effective way to completely recovered even to its pristine state . Similarly, another method for recovering nanoadsorbents has been rinsing with deionized water and following with post-treatment .