TY - JOUR AU - Mitali Sarkar, AU - Pankaj Sarkar, AU - Swagatam Sarkar, AU - Shanku Denrah, PY - 2020/12/29 Y2 - 2024/03/29 TI - Optimization and Feasibility of Alizarin Red S Retention on Iron- Loaded Cellulose Nanocomposite Bead JF - Nanoarchitectonics JA - Nanoarchitectonics VL - 2 IS - 1 SE - Article DO - 10.37256/nat.212021644 UR - https://ojs.wiserpub.com/index.php/NAT/article/view/644 SP - 39-60 AB - <p>Iron(III) loaded cellulose nanocomposite bead, synthesized through sol-gel method, was characterized by&nbsp;Fourier transform infra-red spectroscopy, field emission scanning electron microscopy, energy dispersive spectroscopy,&nbsp;atomic force microscopy, tunneling electron microscopy, and tested for adsorptive removal of alizarin red S from&nbsp;aqueous solution. The influence of variables such as pH, contact time, initial dye concentration, adsorbent dose and&nbsp;temperature for dye retention were investigated in batch operation. The process was optimized by employing response&nbsp;surface methodology following full factorial and central composite design. The maximum adsorption of 97% was&nbsp;observed at an optimum condition of pH 3.0, dose of 2.0 gdm<sup>-3</sup> and shaking time of 45 mins corresponding to the dye&nbsp;concentration of 100 mgdm<sup>-3</sup> at 303 K. Correlation of cooperative influences of the significant variables and the extent&nbsp;of dye adsorption were represented by a second order polynomial equation. The mutual interactions of the significant&nbsp;variables were presented by 3D response surface and 2D contour plots in the design space. The adsorption was better&nbsp;described by Langmuir isotherm and pseudo second order kinetics. The process was spontaneous (-∆G°, 48.19 kJmol<sup>-1</sup> ),&nbsp;feasible (∆S°, 0.284 Jmol <sup>-1</sup> K<sup>-1</sup> ) and endothermic (∆H°, 71.62 kJmol<sup>-1</sup> ). The adsorbent can be regenerated with NaOH (10.0&nbsp;× 10<sup>-2</sup> M) and recycled for reuse, at least for five successive operations.</p> ER -