Synthesis of iron-nano particles from solid industrial waste for mine water treatment
Bhandari, Avinash (2017)
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Iron-nano particles were developed from solid industrial waste containing iron compounds and tested as potential sorbent for acid mine drainage (AMD) treatment. A simple cost effective treatment method to obtain iron nanoparticles was conducted using alkaline solution. Analytical instruments such as X-ray diffraction (XRD), Transmission electronic microscope (TEM), Fourier Transform Infrared spectroscopy (FTIR) and Brunauer-Emmett-Teller surface area analysis (BET) were used to characterize thus synthesized iron nanoparticles. This newly synthesized material proved high adsorption capacity towards common metal ions present in AMD such as Fe, Cu, Zn, Mn and As during removal study (pH dependence, kinetics and equilibrium experiments). Adsorption of these metal ions followed pseudo-second order model, which implies chemisorption. Batch adsorption experiments were performed in this work with synthetic mine water to find the optimum adsorption parameters. In addition to that, a column adsorption test was executed with continuous flow of synthetic and natural water for uranium and other pollutants removal. Inductively coupled plasma atomic emission spectroscopy (ICP OES) was used extensively for the determination of concentration of metal ions in the solution before and after adsorption. The result suggests a high potential for the studied material to be used as a low cost adsorbent for treatment of acid mine drainage.