Synthesis, Characterization and Application of PEGylated Bimetallic Oxide Snail Shell Based Adsorbent for Remediation of Methylene Blue Polluted Wastewater
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Date
2023-12
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Lead City University
Abstract
Dyes polluted waste water has been shown to be catastrophic and lethargic to the environment; flora and fauna, resulting to an imbalance in the eco-system. This study focuses on the synthesis of bimetallic oxide and PEGylated biomass based adsorbent for effective uptake of methylene blue (MB) dye from waste water. The snail shell-based sorbents were synthesized through wet impregnation followed by calcination, which were characterized using FTIR, XRD, SEM and EDX. The batch adsorption experiment of methylene blue was carried out by varying the operating parameters such as contact time, temperature, pH, adsorbent dose, and initial adsorbate concentration. The optimum pH for this study was found at pH 3 with dosage of 10 mg, at 25 °C
uptake of MB at 93.5% (CaO), 94.19% (Al2O3/Fe2O3-CaO) and 91.91% (PEGylated Al2O3/Fe2O3-CaO). SEM images of the catalysts showed well-organized rod-like and cubic aggregates, while XRD showed a highly crystalline bio-sorbent material. The EDX confirms an effective impregnation of the biomass material with the metal oxide while FTIR spectra showed the presence of O-H, N-H, C=O and C-O moiety available for the efficient adsorption of MB. Langmuir-Freundlich isotherm model best described the adsorption data for all the catalysts:CaO with R2 value=0.994 and Qmax= 349.37mg/g. Al2O3/Fe2O3-CaO; with R2 value = 0.986 and Qmax = 218.5 mg/g and PEGylated Al2O3/Fe2O3-CaO; with R2 value = 0.984 and Qmax = 1570mg/g The study is best fitted into Brouers Sotolongo sractals kinetics at a recorded R2 = 0.991 and Qmax= 78.91 mg/g (CaO). R2 = 0.995 and Qmax = 52.10 mg/g (Al2O3/Fe2O3-CaO), and R2= 0.992 and Qmax =27.69 me/g (PEGylated Al2O3/Fe2O3-CaO). This study revealed that snail shell based adsorbent could be regarded as a promising biosorbent for the remediation of methylene Blue polluted wastewater.
Keywords: Wastewater, Methylene blue, Catalysts, Biomass based adsorbent.
Word Count: 284
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Keywords
Wastewater, Methylene blue, Catalysts, Biomass based adsorbent.
Citation
Kate Turabian