Graphene Oxide as a Pb(II) Separation Medium: Has Part of the Story Been Overlooked?
Manh‐Thuong Nguyen, Jun Zhang, Venkateshkumar Prabhakaran, Shuai Tan, Eric T. Baxter, V. Shutthanandan, Grant E. Johnson, Roger Rousseau, Vassiliki‐Alexandra Glezakou
Abstract
anions, following COOH deprotonation, stabilize Pb(II) through strong electrostatic interactions. This suggests that, among the functional groups under study, COOH offers the best Pb(II) adsorption capacity and the ability to regenerate the sorbent through a pH swing. In line with computation, striking experimental observations revealed that a substantial increase in Pb(II) adsorption occurs with increasing pH. Our findings provide a systematic framework for controlled design and implementation of regenerable C-based sorbents used in separations and desalination.
Topics & Concepts
AdsorptionGrapheneOxideDeprotonationDesalinationChemical engineeringSorbentIonChemistryWater desalinationInorganic chemistryMaterials scienceNanotechnologyOrganic chemistryMembraneBiochemistryEngineeringGraphene research and applicationsMembrane Separation TechnologiesGraphene and Nanomaterials Applications