TY  - BOOK
AU  - Ma. Fatima B. Dela Cruz, Fayree Charm M. Castillo, Nicole Shaine V. Redoquerio, Bryll P. Sampilo.
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SN  - 2
PY  - 4544///446
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KW  - 2
KW  - 0
KW  - 6
KW  - 20
N1  - Undergraduate Thesis : (Bachelor of Science in Chemistry) - Pamantasan  ng Lungsod ng Maynila, 2024; 5
N2  - ABSTRACT:  This study determined the adsorption capacity of untreated corn husk as an adsorbent for four different dyes: methylene blue, crystal violet, rhodamine B, and congo red. These dyes were known to be pollutants in wastewater due to different industrial processes and are difficult to treat because of their stability. To study the adsorption process between corn husk and the dyes, the corn husk;s infrared spectrum was obtained to give the surface functional groups present. The IR spectrum showed distinct peaks that confirmed the corn husk's structure to be mostly cellulose. Batch adsorption experiments were conducted to determine adsorption isotherms and kinetics parameters. Mythelene blue had an adsorption capacity of 37.0 mg/g  and Temkin as its adsorption isotherm model. Crystal violet had an adsorption capacity of 30.8 mg/g and Temkin as its adsorption isotherm model. Rhodamine B had an adsorption capacity of 9.18 mg/g and Langmuir as its adsorption isotherm model. Lastly, congo red had an adsorption capacity of 14.7 mg/g and Freundlich as its adsorption isotherm model. All four dyes had pseudo-second order as their best fir adsorption kinetics model with their rate constants having the values of 0.0468, 0.0999, -0.0228, and 0.000315 for methylene blue, crystal violet, rhodamine B, and congo red, respectively. In conclusion, the untreated corn husk proved to be an effective adsorbent against methylene blue, crystal violet, rhodamine B, and congo red
ER  -