Waste Glass Fiber Fabric as a Support for Facile Synthesis of Microporous Carbon To Adsorb Cr(VI) from Wastewater

Abstract

Activated 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, N 2 -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.

Preparation, Kinetics, Thermodynamics, and Mechanism Evaluation of Thiosemicarbazide Modified Green Carboxymethyl Cellulose as an Efficient Cu(II) Adsorbent

“…Industrial wastewater consists of various toxic metal ions such as Pb­(II), Hg­(II), Cu­(II), As­(VI), As­(III), and Cd­(II). − Thus, it has become essential to remove these toxic metal ions from industrial wastewater before its reuse. Various methods were developed for removing these toxic metal ions, namely, chemical or electrochemical treatment or precipitation, ion-exchange, coagulation-flocculation, flotation process, membrane filtration, solvent extraction, and adsorption . All of these methods are costly and pose significant problems in disposal of the precipitated wastes. , To overcome these problems, adsorption is choosed as common and cheap methods, mainly when it is used at low metal ion concentrations. , According to the adsorbent material, adsorption is divided into various categories such as bone charcoal, , aluminum salt, rare earth, and bioadsorption.…”

Fabrication and Characterization of Activated Carbon Fibers from Oil Palm Trunk

“…These results can be attributed to the porous structure and oxygen-containing functional groups on the surface of ACFs. Besides, the Cr(VI) adsorption value achieved in this study was higher than that of cotton-based ACFs and also comparable to that of AC and its fibric composite [37][38][39]. Consequently, ACFs in this study could be considered as an alternative material for the Cr(VI) removal.…”

Enhanced removal of ionic dyes by hierarchical organic three-dimensional layered double hydroxide prepared via soft-template synthesis with mechanism study

“…In general, the factors influencing the equilibration time for dye adsorption include [33]: i) the transport of dye molecules driven by concentration gradient; ii) the availability of active sites; and iii) the binding interactions between the dye molecules and absorbent. To investigate the effect of contact time, three different initial concentrations (50, 100 and 200 mg•L -1 ) are performed as depicted in Fig.…”