Oxidized jute as a valuable adsorbent for Congo Red from an aqueous solution

The raw jute fabric was oxidized with 0.2% or 0.4% NaIO 4 for 60 120 min to obtain valuable adsorbents the textile dye Congo Red (CR). Batch adsorption experiments were carried out as a function of solution pH, contact time, initial CR concentration, and temperature. At an concentration 25 mg/L, possessed lowest due availability content carboxyl aldehyde groups capable binding dye. fabrics reached equilibrium after 240 330 min, respectively. onto studied followed pseudo-second-order model indicating that chemisorption process is primarily represented. Within range concentrations (25–100 mg/L), its obeys Langmuir isotherm (i.e. occurs at specific, energetically equivalent adsorbent sites monolayer coverage over homogeneous surface), wherein calculated maximal capacity 12.863 mg/g. A thermodynamic study revealed spontaneous endothermic character fabric. Based on recorded ATR-FTIR spectra before adsorption, it suggested repulsion, hydrogen bonds, π-π stacking interactions are involved in fabrics.