Removal of Mn (II) by Sodium Alginate/Graphene Oxide Composite Double-Network Hydrogel Beads from Aqueous Solutions

XZ Yang, TZ Zhou, BZ Ren, A Hursthouse, Yongchao Zhang

    Research output: Contribution to journalArticleScientificpeer-review

    33 Citations (Scopus)

    Abstract

    After the successful preparation of empirical double network hydrogel beads from graphene oxide/sodium alginate(GO/SA), its cationic metal adsorption performance in aqueous solutions were investigated. Taking Mn(II) as an example, the contribution of several factors including pH, bead dosage, temperature, contact time and initial concentration ions to adsorption efficiency were examined. The Transmission Electron Microscopy (TEM) results indicate that the GO/SA double (GAD) network hydrogel bead strongly interpenetrate and the adsorption of Mn(II) is mainly influenced by solution pH, bead dose and temperature. The GAD beads exhibit an excellent adsorption capacity of 56.49 mg g(-1). The adsorption process fit both Pseudo-second order kinetic model (R-2 > 0.97) and the Freundlich adsorption isotherm (R-2 > 0.99) and is spontaneous. After seven rounds of adsorption-desorption cycle, the adsorption capacity of GAD hydrogel remained unchanged at 18.11 mg/g.
    Original languageUndefined/Unknown
    Pages (from-to)
    Number of pages16
    JournalScientific Reports
    Volume8
    DOIs
    Publication statusPublished - 2018
    MoE publication typeA1 Journal article-refereed

    Cite this