SINTESIS CoFe2O4/SiO2/Ag UNTUK ADSORPSI ZAT WARNA METILEN BIRU DAN UJI ANTIBAKTERI

GAYATRI, ANGGUN DITA DYAH and Loekitowati, Poedji and Eliza, Eliza (2022) SINTESIS CoFe2O4/SiO2/Ag UNTUK ADSORPSI ZAT WARNA METILEN BIRU DAN UJI ANTIBAKTERI. Undergraduate thesis, Sriwijaya University.

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Abstract

Research has been carried out on the synthesis of CoFe2O4/SiO2/Ag for adsorption of methylene blue dye and antibacterial test. The results of the synthesis were characterized using XRD, SEM-EDS and VSM. The results of XRD characterization showed the highest intensity was located at 2θ = 35.82o with a crystal size of 7.34 nm. The results of SEM-EDS characterization showed heterogeneous morphology with constituent elements include of Co (8.66%), Fe (16.67), O (38.33%), Si (0.97%) and Ag (25.90%). The results of the VSM characterization of the hysteresis curve resulted in a saturation magnetization of CoFe2O4/SiO2/Ag of 41.82 emu/g. CoFe2O4/SiO2/Ag have a pHpzc value at 8.The optimum condition for the adsorption of CoFe2O4/SiO2/Ag to methylene blue is pH 9 with a dye concentration of 20 mg/L and a contact time of 40 minutes with an adsorption percentage of 95.37%. The adsorption isotherm of CoFe2O4/SiO2/Ag against methylene blue corresponds to the Freundlich isotherm with a regression value of 0.9222. The adsorption kinetics of CoFe2O4/SiO2/Ag against methylene blue followed a pseudo second-order adsorption kinetics model with a regression value of 0.9987. CoFe2O4/SiO2/Ag has antibacterial properties that can inhibit the activity of Escherichia coli and Staphylococcus aureus bacteria with a minimum inhibitory concentration (MIC) of 0.625 µg/mL. A better zone of inhibition was produced by Staphylococcus aureus bacteria.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	CoFe2O4¬/SiO2/Ag, adsorpsi, antibakteri, zat warna metilen biru.
Subjects:	Q Science > QD Chemistry > QD71-142 Analytical chemistry
Divisions:	08-Faculty of Mathematics and Natural Science > 47201-Chemistry (S1)
Depositing User:	Anggun Dita Dyah Gayatri
Date Deposited:	24 Nov 2022 07:39
Last Modified:	24 Nov 2022 07:39
URI:	http://repository.unsri.ac.id/id/eprint/82660

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