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Issue 20, 2019, Issue in Progress
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Biosorption of anionic and cationic dyes via raw and chitosan oligosaccharide-modified Huai Flos Chrysanthemum at different temperatures

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Abstract

Raw Huai Flos Chrysanthemum (HFC) and modified HFC (HFC@CO) were used for the first time as a biosorbent material to remove cationic dyes Malachite green (MG) and Crystal violet (CV), and anionic dyes Sunset yellow (SY), Lemon yellow (LY), and Carmine (CM), at different temperatures (5–50 °C). The highest removal rates (R) for dye adsorption were observed at low temperature (5 °C) and room temperature (20 °C). At high (500 mg L−1) dye concentration, adsorption was completed within one minute, but the time required to reach adsorption equilibrium was longer than at the low (20 mg L−1) concentration. The experimental data fitted very well to the Langmuir model and the values of the maximum adsorption capacity for SY, LY, CM, CV, and MG, were 481.41, 507.23, 141.78 mg g−1, 526.32, and 769.23 mg L−1, respectively. The adsorption data fit well to a pseudo-second-order kinetic model.

Graphical abstract: Biosorption of anionic and cationic dyes via raw and chitosan oligosaccharide-modified Huai Flos Chrysanthemum at different temperatures

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Publication details

The article was received on 16 Jan 2019, accepted on 26 Mar 2019 and first published on 10 Apr 2019


Article type: Paper
DOI: 10.1039/C9RA00378A
RSC Adv., 2019,9, 11202-11211
  • Open access: Creative Commons BY-NC license
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    Biosorption of anionic and cationic dyes via raw and chitosan oligosaccharide-modified Huai Flos Chrysanthemum at different temperatures

    Y. Zhang, H. Wan, J. Zhao and J. Li, RSC Adv., 2019, 9, 11202
    DOI: 10.1039/C9RA00378A

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