| Popis: |
The majority of toxins, including metal ions, organic wastes, particularly dyes, and other inorganic wastes, are released into the environment today as a main problem of increased industry. These pollutants primarily disrupt the balance of the environment and harm people's health. In this work, attempts were taken to develop a graphene oxide-based nanocomposite with polypyrrole (GO/PP) as a versatile adsorbent. Initially, GO/PP nanocomposites were prepared with different GO/PP ratios, and initial adsorption studies were conducted towards organic dyes, lead ions, cadmium ions, and fluoride ions to identify the best ratio. GO/PP with a 20:80 ratio was identified as the most efficient adsorbent out of all the prepared materials. This material was characterized to identify its crystallinity, morphology, functional groups, and thermal properties using the X-ray diffractometer (XRD) technique, Scanning electron microscope (SEM), Fourier Transform Infrared (FTIR), UV–visible spectrometer, and Raman spectroscopy. In this work, we report the adsorption properties of cationic rhodamine B (RhB) and anionic methyl orange (MeO) towards GO/PP 20:80 nanocomposites. The best-fitted kinetic model for both dyes was the pseudo-second-order model. The calculated dye removal efficiency for MeO and RhB was 98.40% and 99.90% within a contact time of 30 min and 10 min respectively at optimum pH of 7. The best-fitted isotherm model for RhB was the Freundlich model with 10.52 mg g−1 and the best-fitted isotherm model for MeO was the Langmuir model with 9.61 mg g−1 maximum adsorption capacities. The studies indicated that GO/PP can be used in gravity filtration and can effectively be regenerated. |
