This paper describes the preparation of nano@lignocellulose (nano@LC) and a nano@lignocellulose/montmorillonite (nano@LC/MT) nanocomposite, as well as the capacity of the nano@LC/MT for adsorbing manganese ions from aqueous solution. The structure of nano@LC and nano@LC/MT was characterised by Fourier-transform infrared spectroscopy, X-ray diffraction, Scanning electron microscopy, and Transmission electron microscopy, which revealed that the diffraction peak of montmorillonite almost disappeared, infrared bands of the functional groups shifted, and morphology of the material changed after the formation of the composite. The optimum conditions for the adsorption of Mn(II) on the nano@LC/MT nanocomposite were investigated in detail by changing the initial Mn(II) concentration, pH, adsorption temperature, and time. The results revealed that the adsorption capacity of the nano@LC/MT nanocomposite for Mn(II) reached 628.0503 mg/g at a Mn(II) initial concentration of 900 mg/L, solution pH 5.8, adsorption temperature 55 °C, and adsorption time 160 min. Adsorption kinetics experiments revealed good agreement between the experimental data and the pseudo-second order kinetic model. The experimental data was satisfactorily fitted to the Langmuir isotherm. Adsorption-desorption results showed that nano@LC/MT exhibited excellent reusability. The adsorption mechanism was investigated through FT-IR and EDX spectroscopic analyses. The results suggested that nano@LC/MT have great potential in removing Mn(II) from water.

中文翻译：

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纳米@木质纤维素插层蒙脱土作为吸附剂，可有效去除水溶液中的锰（II）。


本文介绍了纳米@木质纤维素（nano@LC）和纳米@木质纤维素/蒙脱土（nano@LC/MT）纳米复合材料的制备，以及纳米@LC/MT对水溶液中锰离子的吸附能力。通过傅里叶变换红外光谱、X射线衍射、扫描电子显微镜和透射电子显微镜对nano@LC和nano@LC/MT的结构进行了表征，结果表明蒙脱土的衍射峰几乎消失，红外波段复合材料形成后，官能团发生变化，材料的形态发生变化。通过改变初始Mn(II)浓度、pH、吸附温度和时间，详细研究了nano@LC/MT纳米复合材料吸附Mn(II)的最佳条件。结果表明，当Mn(II)初始浓度为900 mg/L、溶液pH 5.8、吸附温度55 ℃时，nano@LC/MT纳米复合材料对Mn(II)的吸附容量达到628.0503 mg/g。吸附时间160分钟吸附动力学实验表明实验数据与准二级动力学模型之间具有良好的一致性。实验数据令人满意地符合朗缪尔等温线。吸附-解吸结果表明nano@LC/MT表现出优异的可重复使用性。通过 FT-IR 和 EDX 光谱分析研究了吸附机理。结果表明nano@LC/MT在去除水中Mn(II)方面具有巨大潜力。