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- W2065594272 abstract "In the present study, a mag-molecule was fabricated by functionalizing of silica-coated magnetite nanoparticles (MNPs) with 3-aminopropyl triethoxysilane (APTES). The amine functional group on surface of the particles was detected using Fourier transmission infrared spectroscopy technique. The morphology and dispersion of the functionalized magnetite nanoparticles (FMNPs) were observed through SEM images. The X-ray diffraction pattern illustrated the cubic crystal structure of MNPs with 28.79 nm of diameter which was almost identical with SEM images. The kinetic of adsorption was studied and pseudo-second-order represented the best fitting to the experimental data. In addition, chemical adsorption for MNPs and physical adsorption for FMNPs were diagnosed applying the Elovich model. The Freundlich model showed a better result for MNPs, which demonstrates a multilayer adsorption on heterogeneous surface, while the Langmuir model was well fitted to FMNPs data, which indicates a homogeneous adsorption at one layer. Continuous system was performed in the fixed-bed column and the obtained results showed the efficiency of continuous system in selenium (Se) removal. The breakthrough curves were provided in three different flow rates and two bed depths and the results showed that the Thomas model can be a promising model for prediction of column performance. The Yoon–Nelson model also represented an acceptable conformation to experimental data. The time required to reach outlet concentration to 50% of initial concentration was calculated by Yoon–Nelson model, and the results were found to be in agreement with the experiments." @default.
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- W2065594272 date "2014-11-19" @default.
- W2065594272 modified "2023-09-23" @default.
- W2065594272 title "Kinetic and equilibrium study of selenium removal from wastewater in mag-molecular process" @default.
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- W2065594272 doi "https://doi.org/10.1080/19443994.2014.979441" @default.
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