SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2024, Vol. 67 ›› Issue (3): 106-116.DOI: 10.1016/j.cjche.2023.12.002

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Ultra-high specific surface area activated carbon from Taihu cyanobacteria via KOH activation for enhanced methylene blue adsorption

Yifang Mi1, Wenqiang Wang1, Sen Zhang1, Yalong Guo1, Yufeng Zhao2, Guojin Sun2, Zhihai Cao1   

  1. 1 Key Laboratory of Advanced Textile Materials and Manufacturing Technology and Engineering Research Center for Eco-Dyeing & Finishing of Textiles, Ministry of Education, Zhejiang Provincial Engineering Research Center for Green and Low-carbon Dyeing & Finishing, Zhejiang Sci-Tech University, Hangzhou 310018, China;
    2 Key Laboratory for Technology in Rural Water Management of Zhejiang Province, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
  • Received:2023-09-28 Revised:2023-11-23 Online:2024-06-01 Published:2024-03-28
  • Contact: Guojin Sun,E-mail address:sungj@zjweu.edu.cn;Zhihai Cao,E-mail address:zhcao@zstu.edu.cn.
  • Supported by:
    This work was financially supported by the Key Research & Development program of Zhejiang Province (2021C03196), the National Key Research and Development Program of China (2022YFE0128600), and the Natural Science Foundation of Zhejiang Province (LY22B060011).

Ultra-high specific surface area activated carbon from Taihu cyanobacteria via KOH activation for enhanced methylene blue adsorption

Yifang Mi1, Wenqiang Wang1, Sen Zhang1, Yalong Guo1, Yufeng Zhao2, Guojin Sun2, Zhihai Cao1   

  1. 1 Key Laboratory of Advanced Textile Materials and Manufacturing Technology and Engineering Research Center for Eco-Dyeing & Finishing of Textiles, Ministry of Education, Zhejiang Provincial Engineering Research Center for Green and Low-carbon Dyeing & Finishing, Zhejiang Sci-Tech University, Hangzhou 310018, China;
    2 Key Laboratory for Technology in Rural Water Management of Zhejiang Province, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
  • 通讯作者: Guojin Sun,E-mail address:sungj@zjweu.edu.cn;Zhihai Cao,E-mail address:zhcao@zstu.edu.cn.
  • 基金资助:
    This work was financially supported by the Key Research & Development program of Zhejiang Province (2021C03196), the National Key Research and Development Program of China (2022YFE0128600), and the Natural Science Foundation of Zhejiang Province (LY22B060011).

Abstract: Cyanobacteria-based activated carbon (CBAC) was successfully prepared by pyrolysis-activation of Taihu cyanobacteria. When the impregnation ratio and activated temperature were 2 and 800 ℃, respectively, the optimal CBACs possessed an ultra-high specific surface (2178.90 m2·g-1) and plenty of micro- and meso-pores, as well as a high pore volume (1.01 cm3·g-1). Ascribed to ultra-high surface area,π-π interaction, electrostatic interaction, as well as hydrogen-bonding interactions, the CBACs displayed huge superiority in efficient dye removal. The saturated methylene blue adsorption capacity by CBACs could be as high as 1143.4 mg·g-1, superior to that of other reported biomass-activated carbons. The adsorption was endothermic and modeled well by the pseudo-second-order kinetic, intra-particle diffusion, and Langmuir models. This work presented the effectiveness of Taihu cyanobacteria adsorbent ascribed to its super large specific surface area and high adsorption ability.

Key words: Activated carbon, Biomass, Dye adsorption, Taihu cyanobacteria

摘要: Cyanobacteria-based activated carbon (CBAC) was successfully prepared by pyrolysis-activation of Taihu cyanobacteria. When the impregnation ratio and activated temperature were 2 and 800 ℃, respectively, the optimal CBACs possessed an ultra-high specific surface (2178.90 m2·g-1) and plenty of micro- and meso-pores, as well as a high pore volume (1.01 cm3·g-1). Ascribed to ultra-high surface area,π-π interaction, electrostatic interaction, as well as hydrogen-bonding interactions, the CBACs displayed huge superiority in efficient dye removal. The saturated methylene blue adsorption capacity by CBACs could be as high as 1143.4 mg·g-1, superior to that of other reported biomass-activated carbons. The adsorption was endothermic and modeled well by the pseudo-second-order kinetic, intra-particle diffusion, and Langmuir models. This work presented the effectiveness of Taihu cyanobacteria adsorbent ascribed to its super large specific surface area and high adsorption ability.

关键词: Activated carbon, Biomass, Dye adsorption, Taihu cyanobacteria