| Abstract [eng] |
In the framework of this research, an extensive two-phase study was embarked upon, focusing on investigating the adsorption capabilities of methylene blue dye using cellulose nanofibers. The cellulose nanofibers were created using the electrospinning process of regenerated cellulose polymer solution. The two phases of this research encompassed two consequential objectives. The initial phase revolved around the determination of optimal ratios within the polymer solution, that was intended for fabrication, as well as the electrospinning process parameters. Following this phase, the secondary phase centered its attention on a thorough exploration of the adsorptive capacity and the efficiency of the meticulously fabricated fibers. To provide a more comprehensive picture, a selected segment of the produced fibers, along with unprocessed raw cellulose underwent modification. This modification was undertaken using two distinct processes: ozonation modification and plasma modification. Upon examination of the data obtained, the results demonstrated that the operational parameters that led to the most advantageous qualities were established at a voltage difference of 12 kV, coupled with a nozzle flow rate maintained at 9 mm/h, and equally balanced quantities of the employed ionic liquid and dimethyl sulfoxide. The cellulose that had undergone the ozone modification process surfaced as the front runner in terms of performance. This was evident when observing the rate of sorption and the overall adsorption capacity, as it presented significant advantages when pitted against its counterparts. In addition to the primary results, the kinetics and isotherms of the study were subjected to detailed analysis, providing additional layers of understanding and insight into the processes and results observed. The completion of this study involved a comprehensive examination of the findings, which were compared with existing literature on this topic. The cellulose tested in this study exhibited acceptable results, but only over an extended period, characterized by high pseudo-second-order kinetic constant and Freundlich kf and n constants values, distinguishing it from other similar cellulose adsorbents. However, the results were tempered by certain limitations and discrepancies, mainly arising from the design of the experiment, including the duration, and physical deterioration of the fibers. These factors underscore the scope for refinement and the need for continual evolution in experimental design and procedure in future studies. |
