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<p>A novel natural polymer-based cryogel, isinglass-bassorin (IG-BR), was produced with a simplified technique and successfully employed to eliminate safranin O (SO) from the aqueous phase. The cryogel was analyzed using X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Fourier-transform infrared spectroscopy (FTIR), and Brunauer–Emmett–Teller (BET) analysis. The Zetta potential measurements revealed a negative surface charge on the IG-BR, making it suitable for removing cationic dyes. An investigation into the adsorption process involved examining the influence of various parameters, including pH, Duration of interaction, Starting dye concentration, quantity of adsorbent, and system temperature. The process of adsorption was further characterized by evaluating its isotherms, kinetics, and thermodynamics. The maximum sorption capacity of the IG-BR cryogel reached 208.76 mg/g. Experimental findings revealed that the adsorption data for the IG-BR cryogel were effectively fitted to pseudo-first-order kinetics and the Langmuir isotherm. Furthermore, cryogel exhibited commendable stability, maintaining a high level of adsorption capacity throughout five regeneration cycles.</p> Graphical Abstract <p></p>

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Developing an Eco-Friendly Adsorbent: Isinglass-Bassorin Cryogel for Safranin O Dye Removal

  • 期刊论文

  • 发表日期：

    2025年4月28日

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  • Sina Azadi,
  • Hossein Anaraki-Ardakani,
  • Morteza Rouhani,
  • Zohreh Mirjafari,
  • Shahrzad Abdolmohammadi

摘要

A novel natural polymer-based cryogel, isinglass-bassorin (IG-BR), was produced with a simplified technique and successfully employed to eliminate safranin O (SO) from the aqueous phase. The cryogel was analyzed using X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Fourier-transform infrared spectroscopy (FTIR), and Brunauer–Emmett–Teller (BET) analysis. The Zetta potential measurements revealed a negative surface charge on the IG-BR, making it suitable for removing cationic dyes. An investigation into the adsorption process involved examining the influence of various parameters, including pH, Duration of interaction, Starting dye concentration, quantity of adsorbent, and system temperature. The process of adsorption was further characterized by evaluating its isotherms, kinetics, and thermodynamics. The maximum sorption capacity of the IG-BR cryogel reached 208.76 mg/g. Experimental findings revealed that the adsorption data for the IG-BR cryogel were effectively fitted to pseudo-first-order kinetics and the Langmuir isotherm. Furthermore, cryogel exhibited commendable stability, maintaining a high level of adsorption capacity throughout five regeneration cycles.

Graphical Abstract