Simparmin Br. Ginting, Fika Rofiek Mufakhir, Ardelia Widya Santi, Widi Astuti, Slamet Sumardi, Hutwan Syarifuddin, Arif Rohman, Yudha Gusti Wibowo
Various types of Zeolite/FeCl3 nanocomposites were examined for their efficacy in removing Cr(VI) from an artificial solution. The investigation included an assessment of removal efficiency, expressed as percent removal, as well as the application of isotherm and kinetic models, and an analysis of thermodynamic factors. The nanocomposites were characterized using FTIR, SEM-EDX, and BET analysis. The results indicated that the optimal mass of adsorbent was 2 g, achieving an 87% removal rate for a Cr(VI) concentration of 70 mg/L. The optimal contact time for Cr(VI) removal was found to be 4 h, resulting in a removal efficiency of 93.33%, while the optimum temperature for Cr(VI) removal was determined to be 30 °C, with a reduction of 94.25%. The isotherm model for Cr(VI) sorption onto Zeolite/FeCl3 exhibited a good fit to the Langmuir model (R2 = 0.9564). Thermodynamic analysis revealed that the adsorption process was spontaneous and exothermic. © 2023 Elsevier B.V.
Department of Chemical Engineering, Universitas Lampung, Jl. Prof. Dr. Ir. Sumantri Brojonegoro No.1, Gedong Meneng, Kec. Rajabasa, Lampung, Kota Bandar Lampung, 35141, Indonesia; Research Center for Mining Technology - National Research and Innovation Agency, Jl. Ir. Sutami KM. 15 Tanjung Bintang, South Lampung, Lampung, 35361, Indonesia; Postgraduate Program of Environmental Science, Universitas Jambi, Jambi, Indonesia; Department of Geomatic Engineering, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Way Huwi, Kec. Jati Agung, Kabupaten Lampung Selatan, Lampung, 35365, Indonesia; Department of Mining Engineering, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Way Huwi, Kec. Jati Agung, Kabupaten Lampung Selatan, Lampung, 35365, Indonesia; Center for Green and Sustainable Materials, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Way Huwi, Kec. Jati Agung, Kabupaten Lampung Selatan, Lampung, 35365, Indonesia; Doctoral Program of Chemical Engineering, Universitas Gadjah Mada, Daerah Istimewa, Yogyakarta, 55284, Indonesia
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