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 coexisting 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.

In-situ growth of ZIF-8CP with ultra-high adsorption capacity for removing Malachite green from water
    Abstract
    1 Introduction
    2 Experimental section
        2.1 Materials
        2.2 Preparation of ZIF-8CP
        2.3 Adsorption experiments
    3 Results and discussion
        3.1 Evaluation of dye adsorption performance
            3.1.1 3.1.1 Selective adsorption experiments
            3.1.2 3.1.2 Morphology and characterization of the ZIF-8CP and ZIF-8CP-MG
        3.2 Main factors influencing MG adsorption
            3.2.1 Effect of pH
            3.2.2 Effect of co-existing ions
        3.3 Adsorption isotherm
        3.4 Adsorption kinetics study
        3.5 Absorption thermodynamics
        3.6 Reusability study
    4 Conclusion
    Acknowledgements 
    References

• Jie Lou(College of Chemistry and Materials Engineering, Guiyang University, Guiyang 550005, China)
• Qiuping Fu(College of Chemistry and Materials Engineering, Guiyang University, Guiyang 550005, China)
• Lei Yu(College of Chemistry and Materials Engineering, Guiyang University, Guiyang 550005, China)
• Hui Yuan(College of Biological and Environmental Engineering, Guiyang University, Guiyang 550005, China)
• Jie Zhao(College of Chemistry and Materials Engineering, Guiyang University, Guiyang 550005, China)
• Xinde Wei(College of Chemistry and Materials Engineering, Guiyang University, Guiyang 550005, China)
• Tong Wang(College of Chemistry and Materials Engineering, Guiyang University, Guiyang 550005, China)
• Changli Mo(College of Chemistry and Materials Engineering, Guiyang University, Guiyang 550005, China)