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Study on dynamic adsorption of p-nitrophenol by multi-walled carbon nanotubes dispersed cyclodextrin

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Abstract

In this paper, the modified multi-walled carbon nanotubes were prepared by β-cyclodextrin denoted as β-CD-MWNTs. The structure and morphology of β-CD-MWNTs was characterized by TEM and the dynamic adsorption of p-nitrophenol on β-CD-MWNTs was studied by the Thomas model. Some affecting factors of dynamic adsorption and the adsorbent regeneration process such as the sewage concentration, the amount of absorbent in column, including the type of reagent, solid-liquid ratio, regeneration time, and regeneration times were investigated and optimized. The results indicated that the p-nitrophenol removal rate could reach 84% under stuffing 2 g β-CD-MWNTs. The curves of p-nitrophenol’s dynamic adsorption conformed to the Thomas model. Moreover, the adsorption capacity of regenerated β-CD-MWNTs was similar to the fresh β-CD-MWNT column. The optimal conditions of regenerations of β-CD-MWNTs were shown as follows: the type of reagent is anhydrous ethanol, the solid-liquid ratio is 200:40 (mg/mL) and the regeneration time is 120 min.

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Funding

This work was financially supported by the YMU-DEAKIN International Associated Laboratory on Functional Materials, Key Laboratory of Resource Clean Conversion in Ethnic Region, Education Department of Yunnan Province (117-02001001002107) and College Student Innovation and Entrepreneurship Training Project of China (201710691001, 201610691002).

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Correspondence to Min Yang or Hongbin Wang.

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Responsible editor: Tito Roberto Cadaval Jr

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Zhang, L., Tan, W., Duan, Z. et al. Study on dynamic adsorption of p-nitrophenol by multi-walled carbon nanotubes dispersed cyclodextrin. Environ Sci Pollut Res 26, 34110–34116 (2019). https://doi.org/10.1007/s11356-018-3198-1

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  • DOI: https://doi.org/10.1007/s11356-018-3198-1

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