Novel hybrid metal loaded chelating resins for removal of toxic metals from acid mine drainage

Abstract

Fe, Zr and Ti oxides nanoparticles were each embedded onto a weak acid chelating resin for support, by the precipitation method, to generate three hybrid adsorbents of hydrated Fe oxide (HFO-P), hydrated Zr oxide (HZO-P) and hydrated Ti oxide (HTO-P). This paper reports on the characterization, performance and potential of these generated nanoadsorbents in the removal of toxic metal ions from acid mine drainage (AMD). The optimum contact time, adsorbent dose and pH for Al(III) adsorption were established using the batch equilibrium technique. The metal levels were measured using the inductively coupled plasma-optical emission spectrometer (ICP-OES). The SEM-EDS results confirmed the presence of the metal oxides within the hybrid resin beads. HFO-P, HZO-P and HTO-P adsorbed Al(III) rapidly from synthetic water with maximum adsorption capacities of 54.04, 58.36 and 40.10 mg/g, respectively at initial pH 1.80 ± 0.02. The adsorption of Al(III) is of the second-order in nature (R2 > 0.98). The nanosorbents removed 10 selected metals from environmental AMD and the metal removal efficiency was in the order HTO-P > HZO-P > HFO-P. All three hybrid nanosorbents can be used to remove metals from AMD; the choice would be dependent on the pH of the water to be treated.

Study of the dynamic adsorption and the effect of the presence of different cations and anions on the adsorption of As(V) on GUT‐3

“…Adsorption is the most commonly used method for the removal of heavy metal ions present in water. [1][2][3] Metal-organic frameworks (MOFs), a class of compounds containing metal ions and organic ligands, find exclusive application as adsorbents in adsorption. Several studies provide information on the synthesis and properties of MOFs.…”