Nur Ahmad, Fitri Suryani Arsyad, Idha Royani, Patimah Mega Syah Bahar Nur Siregar, Tarmizi Taher, Aldes Lesbani
Preparation of NiAl, ZnAl, NiAl Magnetite Humic Acid (NiAl-MHA) and ZnAl Magnetite Humic Acid (ZnAl-MHA) were successful as evidenced by the characterization using FTIR, XRD, VSM, SEM-EDX, and BET analysis. Fe atom appears after compositing into NiAl-MHA and ZnAl-MHA indicating the magnetic properties of the composite, while %wt C atoms increase indicates the carbon group of humic acid. After 5 times regeneration of NiAl-MHA and ZnAl-MHA, the adsorption percentages of congo red were 95.93 % and 97.29 %, respectively. These results increase the effectiveness of NiAl-LDH and ZnAl-LDH, which decreased in effectiveness after 5 regeneration cycles, from 57.89 to 21.43 % and 76.99 – 53.24 %, respectively. The correlation coefficient value confirmed that the adsorption of congo red using ZnAl, NiAl-MHA, and ZnAl-MHA followed PSO, NiAl followed PFO and Langmuir Isotherm model. The maximum adsorption capacities of NiAl, ZnAl, NiAl-MHA, and ZnAl-MHA to adsorb congo red were 58.823 mg/g, 48.978 mg/g, 135.135 mg/g, and 178.571 mg/g, respectively. © 2023 Elsevier B.V.
Graduate School, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Jl. Palembang-Prabumulih, Km.90-32, South Sumatera, Ogan Ilir, Indonesia; Research Center of Inorganic Center of Inorganic Materials and Complexes, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Jl. Padang Salasa No. 524 Ilir Barat 1, South Sumatera, Palembang, 30139, Indonesia; Department of Environmental Engineering, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Way Hui, Lampung Selatan, 35365, Indonesia
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