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02. DSSC Electronic Theses and Dissertations

Permanent URI for this communityhttps://hdl.handle.net/20.500.14578/3

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Subject: search.filters.lcsh.Methylene blue

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    Evaluation of magnetized miracle fruit (Crescentia cujete) peel ash in the adsorption of methylene blue at different dosage
    Calledo, Carol Joy A. (Davao del Sur State College, 2024-08)
    This study evaluated the magnetized miracle fruit peel ash (MMFPA) as an efficient methylene blue adsorbent. The effect of dosage (0.5 g, 1 g. 1.5 g, 2 g, 2.5 g, and 3 g) was studied to determine the equilibrium concentration, equilibrium adsorption capacity, and removal efficiency of the adsorbent. The experimental data was analyzed using the One-way ANOVA at 1% and 5% level of significance. The treatment means was compared using the Tukeys's Honest Significant Difference (HSD) test. Based on the result in the equilibrium concentration, Dosage Six (D6) had the lowest equilibrium concentration at 0.7997 ppm. In relation to the adsorption equilibrium capacity, D6 had the lowest equilibrium adsorption capacity at 1.64 mg/g. In the removal efficiency, D6 exhibited highest removal efficiency at 98.40%, showing a substantial decrease in the concentration in methylene blue. In general, this study concluded that magnetized miracle fruit peel ash demonstrated a high potential as an economical alternative for treatment of dye contaminated wastewater.
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    Adsorption of methylene blue by magnetized achiote (Bixa orellana) pericarp ash: Effect of pH and kinetics
    Arellano, Jeramay, M. (Davao del Sur State College, 2024-06)
    Wastewater management has long been a significant issue for society. In the Philippines, achiote pericarp is often considered an agricultural waste. It is typically left in open fields or burned in the open air near the trees where they are harvested. This study explores the potential use of this waste material (achiote pericarp ash, APA) in removing dye from liquid solutions. To improve the adsorption capacity of APA, it is necessary to incorporate Fe3O4 into it. This will enhance its ability to effectively adsorb Methylene blue solution. To address this, APA had been impregnated with Fe3O4 nanoparticles to produce magnetized APA (MAPA). The APA used in this study was sourced from the farmlands of J. P. Laurel Malungon, Sarangani, Philippines. An adsorption experiment was thoroughly conducted, investigating the effects of pH and kinetic changes. The MB adsorption process was found to fit with a pseudo-quadratic model, with maximum adsorption observed at pH 10. The identification of functional groups presents before and after magnetization was conducted using Fourier transform infrared spectroscopy (FTIR). Among theme were -OH (intramolecular H-bond), O=OH (phosphorus oxoacid), -CO-CH3 (ketone), -OH (primary alcohol), and -SiCl3 (silicon compounds). These findings encourage farmers to reuse agricultural waste as a valuable product. Future related research could investigate the use of a different dye color or another type of biomass. Ultimately, this investigation provides significant knowledge about the potential role of agricultural by-products for wastewater treatment processes.