Direct synthesis of sodalite from Indonesian kaolin for adsorption of Pb2+ solution, kinetics, and isotherm approach

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Abstract

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 X-ray (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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Wahyuni, T., Prasetyoko, D., Suprapto, S., Qoniah, I., Bahruji, H., Dawam, A., … Jalil, A. A. (2019). Direct synthesis of sodalite from Indonesian kaolin for adsorption of Pb2+ solution, kinetics, and isotherm approach. Bulletin of Chemical Reaction Engineering and Catalysis, 14(3), 502–512. https://doi.org/10.9767/bcrec.14.3.2939.502-512

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