The simultaneous adsorption and desorption of flavonoids from bitter orange peel by the carboxylated multi-walled carbon nanotubes

  • Hassan Gholizadeh
  • Azade Ghorbani-HasanSaraeiEmail author
  • Hasan TahermansouriEmail author
  • Seyed-Ahmad Shahidi
Original Article


The carboxylated multi-walled carbon nanotubes (MWCNTs–COOH) were used as adsorbent for the separation of flavonoids (naringin and rutin) from bitter orange peel. The influence of the parameters such as, pH values, contact time, and desorption conditions was investigated. The samples were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, derivative thermogravimetric, scanning electron microscopy, UV–Vis spectroscopy, and high-performance liquid chromatography. After separation and desorption process, the eluent was injected for chromatography analysis. Under the optimal conditions, experimental results showed that the extraction efficiency of rutin was higher than naringin and other compounds. Moreover, the desorption percentage of flavonoids was calculated 83.6% after four cycles. This research confirmed that this method for separation of flavonoids is simple and less cost. In addition, the separated flavonoids can be used as antioxidant for the future applications.


Carbon nanotubes Flavonoids Adsorption Desorption Thermal analysis 



The financial and encouragement support provided by Research vice Presidency of Ayatollah Amoli Branch, Islamic Azad University.


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Copyright information

© Korean Carbon Society 2019

Authors and Affiliations

  1. 1.Department of Food Science and Technology, Ayatollah Amoli BranchIslamic Azad UniversityAmolIran
  2. 2.Department of Chemistry, Ayatollah Amoli BranchIslamic Azad UniversityAmolIran

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