Abstract
The natural Na-type montmorillonite (Na-MMT) was pillared by iron polycation to obtain Fe-pillared montmorillonite (Fe-MMT). The materials were characterized by X-ray powder diffraction and N2 adsorption–desorption at low temperature. It was found that iron polycation was successfully inserted into MMT layers, and the textural properties of Fe-MMT could be adjusted by altering the amount of iron. Meanwhile, the decolorization of methyl orange (MO) by heterogeneous Fenton-like oxidation using Fe-MMT as catalyst was evaluated. The experimental results showed that Fe-MMT exhibited good decolorization performance of MO under 2.0 g L−1 of Fe-MMT-1.5, initial pH of solution 4, reaction time 90 min, and H2O2 concentration of 5 mmol L−1. Fe-MMT exhibited good stability for the decolorization of MO in solution for three successive runs. The decolorization process could be well described by pseudo firstorder kinetics model.
Graphic abstract
Na-montmorillonite (MMT) pillared by iron polycation (Fe-MMT), an efficient Fenton-like catalyst was developed. The decolorization efficiency of methyl orange (MO) was dependent on the textural properties of Fe-MMT adjusted by altering the amount of iron. Excellent decolorization efficiency of MO (91.6–87.9%) was achieved under the optimal conditions.
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This work was supported by the opening project of Guangxi College and Universities Key Laboratory of Beibu Gulf Oil and Natural Gas Resource Effective Utilization (2017KLOG10).
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Huang, GQ., Qi, GJ., Gao, TY. et al. Fe-pillared montmorillonite as effective heterogeneous Fenton catalyst for the decolorization of methyl orange. J Chem Sci 132, 116 (2020). https://doi.org/10.1007/s12039-020-01820-2
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DOI: https://doi.org/10.1007/s12039-020-01820-2