Phosphorene-based materials are structurally flexible layers where each phosphorus atom is covalently bonded to three adjacent atoms (Scheme 1d), which have been considered promising candidates in pollutant control technologies. Contrary to graphene, the unique structure of phosphorene allows a direct bandgap of 1.5 eV, which confers high carrier mobility, and interesting optical and electronic anisotropy . Regarding its sorbent ability, phosphorene has already been demonstrated by both theoretical and experimental Scheme 1. (a) Structure of methylarsenicals and metabolic pathways for arsenic methylation. (b-f) Low-dimensional adsorbent materials. investigations a larger adsorption capacity for other aqueous pollutants such as toxic dyes; methylene blue, rhodamine B, and N-nitrosodimethylamine since the strength of binding is highly dependent on the amount of charge transfer between the contaminants and the phosphorene layer, which is characteristic of their electrical resistivity . In addition, phosphorene reaches 50-90% efficiency by chemisorption of inorganic arsenicals in water treatment . At the same time, phosphorene shows an adsorption capacity of 4.8 mg g -1 for inorganic iAs III in contrast to graphene, which reaches 1.3 mg g -1 at pH=7 . The adsorption strength on phosphorene is often stronger than graphene because the chemically active phosphorous atom makes it have stronger affinity interaction with the atoms or molecules . Additionally, density functional theory (DFT) calculations show that phosphorene doping with transition metals (e.g., Fe, Ni, and Cu, Scheme 1e) enhances the adsorption capacity by a strong inner-sphere surface complexation of chemical nature reaching adsorption energies of up to ~2.0 eV . Also, the adsorption efficiency for inorganic arsenic removal remains at acidic and neutral environments, with a low competition of adsorption sites with coexisting species and high reusability/recovery of adsorbents by alkaline treatment .