Arsenic exists naturally in the form of oxoanions, and due to its high mobility, toxicity and cancerigenous effects, its removal from fresh water is important. Herein we present the synthesis, characterization and adsorption properties of three multifunctional nanomaterials and the comparison with respect to their parent materials (graphene oxide, iron oxide nanoparticles, magnetic graphene oxide, and three zeolitic imidazolate frameworks: ZIF-8, ZIF-67 and ZIF-Zn/Co). TEM, EDX, FTIR and XRD characterization results show that the ZIFs were successfully assembled onto a magnetic graphene oxide platform. Arsenic adsorption capacity and selectivity towards phosphate ions were tested for a 35 ppb arsenic-contaminated fresh water matrix (NSF53 Test water). Arsenic concentration, measured through ICP-MS, show that the novel composite nanomaterials are suitable candidates for arsenic removal in water treatment. Specifically, the composite consisting of GO/Fe<sub>3</sub>O<sub>4</sub>/ZIF-8, decreased arsenic concentration from 35 to 2.7 ppb (lower than the EPA limit, 10 ppb) after equilibrium was attained.

Magnetic graphene oxide supported zeolitic imidazolate frameworks for As(III) removal from fresh water

2019 Spring National Meeting

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