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In-situ growth of ZIF-8/CP with ultra-high adsorption capacity for removing Malachite green from water

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2023, 33(7), pp.2029-2039
  • DOI : 10.1007/s42823-023-00583-3
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : March 24, 2023
  • Accepted : July 15, 2023
  • Published : December 1, 2023

Lou Jie 1 Fu Qiuping 1 Yu Lei 1 Yuan Hui 2 Zhao Jie 1 Wei Xinde 1 Wang Tong 1 Mo Changli 1

1College of Chemistry and Materials Engineering, Guiyang University, Guiyang, 550005, China
2College of Biological and Environmental Engineering, Guiyang University, Guiyang, 550005, China

Accredited

ABSTRACT

An environmentally friendly and low-cost chitosan-containing polysaccharide (CP) composite ZIF-8/CP was designed and prepared based on the difficulty of separating the traditional adsorbent from the water phase. ZIF-8/CP was synthesized through in-situ growth approach. The physical, chemical and structure properties of ZIF-8/CP were determined through a series of characterization methods, including SEM, FT-IR and PXRD. The effects of touch time, pH, temperature, and co-existing ions on adsorption were assessed. In addition, kinetics, isotherms of adsorption and thermodynamics were examined. The data of isotherms for adsorption indicated that the adsorption of ZIF-8/CP on MG was similar to the Langmuir model, with a maximum adsorption capacity of 1428.57 mg/g. Moreover, the kinetic parameters were consistent with the pseudo-2nd-order equation. Thermodynamic studies (ΔG < 0, ΔH > 0) demonstrated a heat-absorbing and spontaneous adsorption process. Our study reveals that ZIF-8/CP has good adsorption properties and environmental properties.

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