Mechanism of Cd(II) and Cu(II) Adsorption onto Few-Layered Magnetic Graphene Oxide as an Efficient Adsorbent
Ting Guo, Chaoke Bulin, Zeyu Ma, Bo Li, Yanghuan Zhang, Bangwen Zhang, Ruiguang Xing, Xin Ge
Abstract
in 5 and 7 min, respectively. Moreover, FLMGO can be readily recovered via magnetic separation using a hand-held magnet. Adsorptions are spontaneous, endothermic, and entropy increasing, which are the best described by the Freundlich and pseudo-second-order model. The interaction mechanism is as follows: lone pair electrons in C=O- and C-O-related groups were coordinated toward Cd(II) and Cu(II) to induce chemical interaction. The high adsorption efficiency endows FLMGO with encouraging application potential in heavy metal remediation.
Topics & Concepts
AdsorptionGrapheneOxideEndothermic processAqueous solutionMetalFreundlich equationLone pairMaterials scienceChemical engineeringInorganic chemistryChemistryNanotechnologyMoleculePhysical chemistryOrganic chemistryMetallurgyEngineeringAdsorption and biosorption for pollutant removalGraphene research and applicationsNanomaterials for catalytic reactions