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Adsorption of As(V) from Aqueous Solution on Chitosan-Modified Diatomite

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  • Qintao Yang

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China
    Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin 541006, China
    Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China)

  • Liang Gong

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China)

  • Lili Huang

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China)

  • Qinglin Xie

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China
    Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin 541006, China
    Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China)

  • Yijian Zhong

    (College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China
    Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin 541006, China
    Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China)

  • Nanchun Chen

    (College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China)

Abstract

A novel chitosan (CS)-modified diatomite (Dt) was prepared by a simple mixture in the mass ratio to remove As(V) from aqueous solution in this research. The CS-modified Dt adsorbent was characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and X-ray powder diffraction (XRD) analysis. The parameters to influence the adsorption of As(V) ion were studied under such conditions as kinetics, adsorption isotherm, and pH effect. The results revealed that adsorption of As(V) was initially rapid and the equilibrium time was reached after 40 min. The optimal value of the pH was 5.0 for better adsorption. The equilibrium data were well fitted to the Langmuir isotherm compared to the Freundlich isotherm, and exhibited the highest capacity and removal efficiency of 94.3% under an initial As(V) concentration of 5 mg/L. The kinetic data were well described by the pseudo-second-order model. In addition, 0.1 M NaOH has the best desorption efficiency of As(V) adsorbed on CS-modified Dt, and the removal efficiency of As(V) was still higher than 90% when after six adsorption-desorption cycles. These results showed that the CS-modified Dt could be considered as a potential adsorbent for the removal of As(V) in aqueous solution.

Suggested Citation

  • Qintao Yang & Liang Gong & Lili Huang & Qinglin Xie & Yijian Zhong & Nanchun Chen, 2020. "Adsorption of As(V) from Aqueous Solution on Chitosan-Modified Diatomite," IJERPH, MDPI, vol. 17(2), pages 1-15, January.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:2:p:429-:d:306621
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    References listed on IDEAS

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    1. Ioannis A. Katsoyiannis & Nikolaos M. Tzollas & Athanasia K. Tolkou & Manassis Mitrakas & Mathias Ernst & Anastasios I. Zouboulis, 2017. "Use of Novel Composite Coagulants for Arsenic Removal from Waters—Experimental Insight for the Application of Polyferric Sulfate (PFS)," Sustainability, MDPI, vol. 9(4), pages 1-10, April.
    2. Kaihong Yan & Ravi Naidu & Yanju Liu & Ayanka Wijayawardena & Luchun Duan & Zhaomin Dong, 2018. "A Pooled Data Analysis to Determine the Relationship between Selected Metals and Arsenic Bioavailability in Soil," IJERPH, MDPI, vol. 15(5), pages 1-10, April.
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