title: [Comparison of As removal performance by graphene/iron-based material].
abstract: FTIR and XRD showed that three hybid materials which were M-RGO, H-RGO and N-RGO were successfully made from graphene oxide with magnetite, hematite and zero-valence iron respectively. The arsenic removal performance, such as adsorption kinetics, adsorption isotherm, appropriate pH range and resistance to co-existing ions were studied and compared. Results showed that the adsorption of arsenic on three materials fit pseudo-second-order kinetics, and the adsorption isotherm was consistent with the Langmuir model, while the order of adsorption capacities was: N-RGO > M-RGO > H-RGO. Three materials had better adsorptions of As(III) under the condition of weak acid to neutral, the M-RGO and H-RGO materials were less influenced by the pH, and their pH ranges for adsorbing As(III) were wider than that of N-RGO material. In these three materials, N-RGO was least affected by co-existing ions, H-RGO was the second, and M-RGO was most affected.
authors.affiliation: Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. hualei901@126.com
authors.lastname: Chaomuerlege
authors.affiliation: Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Liu
authors.initials: L
authors.lastname: Feng
authors.affiliation: Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Yan-Xia
authors.initials: YX
authors.lastname: Huo
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; C000499:ferric oxide; D006108:Graphite; D007501:Iron; D001151:Arsenic; D052203:Ferrosoferric Oxide