Bulletin of Chemical Reaction Engineering & Catalysis (Dec 2019)

Direct Synthesis of Sodalite from Indonesian Kaolin for Adsorption of Pb2+ Solution, Kinetics, and Isotherm Approach

  • Tri Wahyuni,
  • Didik Prasetyoko,
  • Suprapto Suprapto,
  • Imroatul Qoniah,
  • Hasliza Bahruji,
  • Ahmad Anwarud Dawam,
  • Sugeng Triwahyono,
  • Aishah Abdul Jalil

DOI
https://doi.org/10.9767/bcrec.14.3.2939.502-512
Journal volume & issue
Vol. 14, no. 3
pp. 502 – 512

Abstract

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Indonesian kaolin was used as precursor for synthesis of sodalite. Synthesis parameters were optimized by varying the Si/Al ratios, stirring and aging conditions, and water composition. X-ray diffraction (XRD), Fourier Transform Infra Red (FTIR), Scanning Electron Microscope-Energy Dispersive Xray (SEM-EDX), and Particle Size Analyzer (PSA) were used to characterize sodalite. The potential of sodalite as adsorbent for heavy metal Pb2+ ions removal from waste water was investigated in this work. The uptake adsorption capacities of sodalite was 90-100 mg/g from synthesized sodalite crystallized for 24 and 48 hours, and commercial silica. The kinetic of Pb2+ adsorption was a pseudo second order reaction and the adsorption coefficients was followed Langmuir adsorption isotherm.

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