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Adsorption Properties and Mechanism of Attapulgite to Graphene Oxide in Aqueous Solution

Author

Listed:
  • Na Li

    (School of Civil Engineering, Shaoxing University, Shaoxing 312000, China)

  • Jiyuan Fang

    (School of Civil Engineering, Shaoxing University, Shaoxing 312000, China)

  • Ping Jiang

    (School of Civil Engineering, Shaoxing University, Shaoxing 312000, China)

  • Cuihong Li

    (School of Civil Engineering, Shaoxing University, Shaoxing 312000, China)

  • Haibo Kang

    (School of Civil Engineering, College of Transportation Engineering, Nanjing Tech University, Nanjing 210009, China)

  • Wei Wang

    (School of Civil Engineering, Shaoxing University, Shaoxing 312000, China
    Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore)

Abstract

In order to remove toxic graphene oxide (GO) from aqueous solution, attapulgite (ATP) was used as adsorbent to recycle it by adsorption. In this paper, the effects of different pH, adsorbent mass, GO concentration, time and temperature on the adsorption of GO by attapulgite were studied, and the adsorption performance and mechanism were further explored by XRD, AFM, XPS, FTIR, TEM and SEM tests. The results show that when T = 303 K, pH = 3, and the GO concentration is 100 mg/L in 50 mL of aqueous solution, the removal rate of GO by 40 mg of attapulgite reaches 92.83%, and the partition coefficient K d reaches 16.31. The adsorption kinetics results showed that the adsorption equilibrium was reached at 2160 min, and the adsorption process could be described by the pseudo-second-order adsorption equation, indicating that the adsorption process was accompanied by chemical adsorption and physical adsorption. The isotherm and thermodynamic parameters show that the adsorption of GO by attapulgite is more consistent with the Langmuir isotherm model, and the reaction is a spontaneous endothermic process. The analysis shows that attapulgite is a good material for removing GO, which can provide a reference for the removal of GO in an aqueous environment.

Suggested Citation

  • Na Li & Jiyuan Fang & Ping Jiang & Cuihong Li & Haibo Kang & Wei Wang, 2022. "Adsorption Properties and Mechanism of Attapulgite to Graphene Oxide in Aqueous Solution," IJERPH, MDPI, vol. 19(5), pages 1-16, February.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:5:p:2793-:d:760185
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    References listed on IDEAS

    as
    1. Lianqin Zhao & Sheng-Tao Yang & Shicheng Feng & Qiang Ma & Xiaoling Peng & Deyi Wu, 2017. "Preparation and Application of Carboxylated Graphene Oxide Sponge in Dye Removal," IJERPH, MDPI, vol. 14(11), pages 1-13, October.
    2. Krzysztof Piaskowski & Paweł K. Zarzycki, 2020. "Carbon-Based Nanomaterials as Promising Material for Wastewater Treatment Processes," IJERPH, MDPI, vol. 17(16), pages 1-14, August.
    3. Mohammed Umar Abba & Hasfalina Che Man & Raba’ah Syahidah Azis & Aida Isma Idris & Muhammad Hazwan Hamzah & Mohammed Abdulsalam, 2021. "Synthesis of Nano-Magnetite from Industrial Mill Chips for the Application of Boron Removal: Characterization and Adsorption Efficacy," IJERPH, MDPI, vol. 18(4), pages 1-18, February.
    Full references (including those not matched with items on IDEAS)

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