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Waste Glass Fiber Fabric as a Support for Facile Synthesis of Microporous Carbon To Adsorb Cr(VI) from Wastewater
journal contribution
posted on 2017-08-17, 00:00 authored by Meiling Huang, Shivani Bhardwaj Mishra, Shiquan LiuActivated carbon
coated glass fiber fabric (AC@GFF) was successfully
synthesized by the carbonization of polyvinylpyrrolidone with the
assistance of KOH onto waste glass fiber fabric (GFF). The samples
were characterized by XRD, SEM, N2-sorption, FTIR, XPS,
TG, and DSC measurements. It is shown that KOH not only acted as an
activator during the carbonization process but also facilitated the
adherence of PVP onto the surface of the glass fibers by increasing
the viscosity of the PVP precursor solutions. The prepared AC@GFF
was applied to uptake Cr(VI) from synthetic wastewater, and the factors
such as the pH, initial concentration of adsorbate, contact time,
and adsorption temperature influencing the adsorption of the Cr(VI)
were investigated. The adsorption data were fitted with the isotherm
and kinetic models. The adsorption of metal ions by the AC@GFF from
a real metal passivation wastewater proved that the synthesized adsorbent
was highly selective to Cr(VI) against its inferring Zn(II). The spent
adsorbent together with the adsorbed Cr ions was used as an effective
glass colorant. The method provided a sustainable entrapment of toxic
chromium ions in a glass matrix to produce a color glass, eliminating
pollutions from the Cr(VI), waste GFF, and spent adsorbent.
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Keywords
chromium ionsglass fibersglass fiber fabricmetal ionsXPSwaste glass fiber fabriccolor glassN 2Facile SynthesisXRDglass colorantglass matrixFTIRadsorption temperatureMicroporous CarbonPVP precursor solutionscontact timemetal passivation wastewaterSEMwaste Glass Fiber FabricDSC measurementsCr ionsadsorption dataWastewater Activated carbonKOHcarbonization processTGACadsorbentGFF
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