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Novel Layered Double Hydroxides@carboxymethyl Cellulose Composite Aerogel Towards Co(II) Absorption
Journal of Polymers and the Environment ( IF 5.3 ) Pub Date : 2022-05-16 , DOI: 10.1007/s10924-022-02431-3
Wang Liao , Xinlei Long , Yuping Wei , Yao Xiao

Cobalt (Co) ion is a common heavy metal ion and the main metal ion in nuclear wastewater. However, the study on the absorption for Co(II) is not sufficient. Herein, a novel ES-layered double hydroxide (LDH) is prepared by intercalated ethylenediaminetetraacetic acid disodium salt (EDTA) and sodium dodecylbenzene sulfonate (SDBS) in a magnesium, iron pristine LDH, which is subsequently used for ES-LDH@carboxymethyl cellulose (CMC) composite aerogel. The results of Fourier transform infrared spectroscopy, X-ray diffraction spectra and thermogravimetric analysis shows successfully preparation of intercalated LDH. The pore morphology, specific surface area and pore size distribution of the composite aerogels are characterized by scanning electron microscope and Nitrogen-BET curves. The significantly improved adsorption capacity, adsorption kinetics and isotherms the absorbents on Co(II) are systematically revealed. This study thus provides an important understanding and path for dealing with the threat of Co(II).



中文翻译:

新型层状双氢氧化物@羧甲基纤维素复合气凝胶对 Co(II) 的吸收

钴(Co)离子是一种常见的重金属离子,也是核废水中的主要金属离子。然而,对 Co(II) 吸收的研究还不够充分。在此,通过将乙二胺四乙酸二钠盐 (EDTA) 和十二烷基苯磺酸钠 (SDBS) 嵌入镁铁质 LDH 中制备了一种新型 ES 层状双氢氧化物 (LDH),随后将其用于 ES-LDH@羧甲基纤维素 ( CMC) 复合气凝胶。傅里叶变换红外光谱、X射线衍射光谱和热重分析结果表明成功制备了插层LDH。采用扫描电镜和Nitrogen-BET曲线表征了复合气凝胶的孔形貌、比表面积和孔径分布。吸附能力显着提高,系统地揭示了 Co(II) 上的吸附剂的吸附动力学和等温线。因此,本研究为应对 Co(II) 的威胁提供了重要的认识和途径。

更新日期:2022-05-16
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