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- W2789762169 abstract "To effectively reuse adsorbent in removal of Cd (II), magnetic modification was considered as an alternative. In this study, iron oxide nanoparticles (IONPs) synthesized from the extract of Excoecaria cochinchinensis Lour leaves were modified by low-temperature calcination, and used to remove Cd (II). Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and magnetic properties analysis confirmed the successful synthesis of nanoscale magnetic FeOC composite. Response surface methodology (RSM) served to optimize the adsorption of Cd (II) by IONPs based on Box-Behnken design (BBD). According to the quadratic model, the effect of each factor on the removal of Cd (II) by IONPs was: pH > dosage > ionic strength > temperature. In percentage terms, 98.50% of Cd (II) (10 mg L-1) was removed when the pH, absorbent dosage, temperature and ionic strength conditions were 8.07, 2.5 g L-1, 45 °C, and 0.07 mol L-1, respectively. The adsorption of Cd (II) by IONPs is consistent with pseudo-second order kinetics and Langmuir adsorption isotherm models, indicating that the process of adsorption of Cd (II) by IONPs belongs to monolayer chemical adsorption. The -COOH, -COH, Cπ electron and ≡FeOH may be the binding sites for Cd (II) on the surface of IONPs. Overall, IONPs can be used to remove Cd (II) effectively from aqueous solution in a wide range of conditions." @default.
- W2789762169 created "2018-03-29" @default.
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- W2789762169 date "2018-06-01" @default.
- W2789762169 modified "2023-09-24" @default.
- W2789762169 title "Biosynthesized iron oxide nanoparticles used for optimized removal of cadmium with response surface methodology" @default.
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- W2789762169 doi "https://doi.org/10.1016/j.scitotenv.2018.01.170" @default.
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