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Removal of Arsenic from Wastewater by Using Nano Fe 3 O 4 /Zinc Organic Frameworks

Author

Listed:
  • Xuexia Huang

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
    Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China)

  • Yun Liu

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China)

  • Xinyi Wang

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China)

  • Linwei Zeng

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
    Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China)

  • Tangfu Xiao

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
    Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China)

  • Dinggui Luo

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
    Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China)

  • Jia Jiang

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China)

  • Hongguo Zhang

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
    Linkoping University-Guangzhou University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, China)

  • Yuhui Huang

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China)

  • Mingzhen Ye

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China)

  • Lei Huang

    (School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China)

Abstract

Efficient removal of arsenic in wastewater is of fundamental importance due to the increasingly severe arsenic pollution. In this study, a new composite adsorbent (Fe 3 O 4 @ZIF-8) for As(V) removal from wastewater was synthesized by encapsulating magnetic Fe 3 O 4 nanoparticles into metal organic frameworks. In order to evaluate the feasibility of Fe 3 O 4 @ZIF-8 as an adsorbent for As(V) removal, the adsorption properties of Fe 3 O 4 @ZIF-8 were systematically explored by studying the effects of dosage, pH, adsorption isotherm, kinetics, and thermodynamics. Additionally, the characterization of Fe 3 O 4 @ZIF-8 before and after adsorption was analyzed thoroughly using various tests including SEM-EDS, XPS, BET, XRD, TG, FTIR, and the properties and arsenic removal mechanism of the Fe 3 O 4 @ZIF-8 were further studied. The results showed that the Fe 3 O 4 @ZIF-8 has a specific surface area of 316 m 2 /g and has excellent adsorption performance. At 25 °C, the initial concentration of arsenic was 46.916 mg/L, and pH 3 was the optimum condition for the Fe 3 O 4 @ZIF-8 to adsorb arsenic. When the dosage of the Fe 3 O 4 @ZIF-8 was 0.60 g/L, the adsorption of arsenic by the Fe 3 O 4 @ZIF-8 can reach 76 mg/g, and the removal rate can reach 97.20%. The adsorption process of arsenic to the Fe 3 O 4 @ZIF-8 can be well described by the Langmuir isotherm model and the second-order kinetic equation. At pH 3 and temperature 298 K, the maximum adsorption capacity of arsenic by the Fe 3 O 4 @ZIF-8 was 116.114 mg/g. Through the analysis of thermodynamic parameters, it is proved that the adsorption process of arsenic by the Fe 3 O 4 @ZIF-8 is a spontaneous endothermic reaction. The Fe 3 O 4 @ZIF-8 has broad prospects for removing As(V) pollution in wastewater, because of its strong adsorption capacity, good water stability, and easy preparation.

Suggested Citation

  • Xuexia Huang & Yun Liu & Xinyi Wang & Linwei Zeng & Tangfu Xiao & Dinggui Luo & Jia Jiang & Hongguo Zhang & Yuhui Huang & Mingzhen Ye & Lei Huang, 2022. "Removal of Arsenic from Wastewater by Using Nano Fe 3 O 4 /Zinc Organic Frameworks," IJERPH, MDPI, vol. 19(17), pages 1-15, September.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:17:p:10897-:d:903972
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