Abstract
AbstractThe aim of this research was to pillar the bentonite clay (Bt) with polyhydroxy tin chloride. The synthesized Tin‐pillared interlayer clay (Sn‐PILC) was characterized using X‐ray diffraction (XRD), Fourier Transform Infrared spectra (FT‐IR), Brunauer‐Emmer Teller (BET) analysis, Thermogravimetric analysis (TGA), and Scanning Electron Microscopy (SEM). Adsorption capacity of raw‐Bt and tin pillared interlayer clay (Sn‐PILC) was examined for two dyes, namely, Malachite Green (MG) and Chrysoidine‐Y (CY) from their aqueous solutions. The effects of physicochemical parameters like solution pH, dose, and dye concentration were investigated. The maximum adsorption efficiency at equilibrium dye concentration for Sn‐PILC was 66.229 mg g–1 for MG and 63.792 mg g–1 for CY. Sn‐PILC obeyed Langmuir isotherm for both the dyes whereas raw‐Bt followed Freundlich isotherm. On the other hand, both adsorbents followed PFO as well as PSO kinetic model, indicating physisorption assisted by chemisorption. Thermodynamic studies were performed to determine the adsorption behavior of Sn‐PILC for both the dyes. Regeneration studies revealed 80% efficiency up‐to five adsorption‐desorption cycles.
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