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TREATMENT OF PHENOL AND CRYSTAL VIOLET DYE FROM WASTEWATER USING BIOSILICA HYDROGEL NANOCOMPOSITES
(0024-01-18) EASHA TIR RAZIA
In this study, adsorption of Phenol and Crystal Violet (CV) dye was investigated while using adsorbent Biosilica hydrogel nanocomposites. Biosilica hydrogel nanocomposites were prepared using the hydrogel extracted from okra mucilage and silica extracted from sugarcane bagasse. To examine the functional groups and morphology, these nanocomposites were characterized via Fourier Transform Infrared Radiations (FTIR), and Scanning Electron Microscope (SEM). The batch adsorption experiments were performed by varying factors such as pH, contact time, adsorbent dose and initial concentration. From the results it was found that the maximum removal of crystal violet was 83% at 0.1g/250mL, initial concentration 30 ppm, pH 12 and contact time of 30 minutes. Phenol showed the removal of 79% at optimum conditions i.e. dosage 0.4g/200mL, initial concentration 10 ppm, pH 7 and contact time of 15 minutes. Langmuir was best fitted for phenol (qm 16.28 mg/g) while Freundlich (qm 120.48 mg/g) for crystal violet. Hence, the results indicate that the biosilica hydrogel nanocomposites proved to be more effective for removal of crystal violet as compared to phenol. Moreover, the synthesized adsorbent can be used as the efficient and cost effective alternative for the adsorption of toxic pollutants and coloring agents from wastewater