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Phenol Adsorption Mechanism of Organically Modified Bentonite and Its Microstructural Changes

Author

Listed:
  • Haijie He

    (College of Civil and Architectural Engineering, Taizhou University, Taizhou 318000, China
    College of Civil and Architectural Engineering, Zhejiang University, Hangzhou 310000, China
    Fangyuan Construction Group Co., Ltd., Taizhou 318000, China)

  • Erpei Xu

    (Zhengzhou University Multi-Functional Design and Research Academy Co., Ltd., Zhengzhou 450000, China)

  • Zhanhong Qiu

    (College of Civil and Architectural Engineering, Taizhou University, Taizhou 318000, China)

  • Tao Wu

    (College of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang 212000, China
    Jiangsu Province Engineering Research Center of Geoenvironmental Disaster Prevention and Remediation, Jiangsu University of Science and Technology, Zhenjiang 212000, China)

  • Shifang Wang

    (College of Civil and Architectural Engineering, Taizhou University, Taizhou 318000, China)

  • Yuhua Lu

    (Fangyuan Construction Group Co., Ltd., Taizhou 318000, China)

  • Guannian Chen

    (School of Civil and Environmental Engineering, Ningbo University, Ningbo 315211, China)

Abstract

Bentonite was modified with cetyltrimethylammonium bromide (CTAB). The organically modified bentonite (OMB) was used to remove phenol from aqueous solution, the microstructural changes were characterized by X-ray diffraction (XRD) and scanning electronic microscopy (SEM), and phenol adsorption kinetic was obtained using batch adsorption test results. The results indicated that the rate of adsorption of phenol onto the OMB was positively correlated with the initial concentration, and the maximum adsorption capacity was found to be 10.1 mg/g at the initial concentration of 150 mg/L at 25 °C and pH 10. The investigations of adsorption kinetics models showed that the adsorption kinetic was better reflected by the pseudo-second-order kinetic model. Furthermore, the properties of the OMB samples with different adsorption times were obtained by SEM and XRD. The statistic analysis revealed that the pore diameter of the OMB samples decreased with the increasing adsorption time and gradually reached equilibrium.

Suggested Citation

  • Haijie He & Erpei Xu & Zhanhong Qiu & Tao Wu & Shifang Wang & Yuhua Lu & Guannian Chen, 2022. "Phenol Adsorption Mechanism of Organically Modified Bentonite and Its Microstructural Changes," Sustainability, MDPI, vol. 14(3), pages 1-11, January.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:3:p:1318-:d:732774
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