PREPARATION OF MAGNETITE-FULVIC ACID (Fe3O4-FA) FROM PEAT SOIL AND APPLICATION TO ADSORB RHODAMINE-B
Abstract
Pada penelitian ini dilakukan preparasi adsorben Fe3O4 terlapis asam fulvat (Fe3O4-AF) dari tanah gambut dan diaplikasikan untuk mengadsorpsi zat warna rhodamin B. Sintesis Fe3O4-AF dilakukan dengan metode ko-presipitasi, karakterisasi meliputi analisis FTIR, XRD, SEM dan VSM serta mengetahui kondisi pH optimum adsorpsi rhodamin-B pada Fe3O4-AF. Adsorben Fe3O4-AF berhasil disintesis dengan menunjukkan munculnya spektra FTIR yang khas yakni gugus Fe-O, O-H, C-H, C=C dan C=O. Struktur kristal Fe3O4-AF tidak mengalami perubahan, morfologi permukaan berupa koloid rigid AF tertempel bulatan sferis Fe3O4 dan nilai kemagnetan Fe3O4 menurun dengan adanya AF. Kondisi optimum adsorpsi rhodamin B pada Fe3O4-AF terjadi pada pada pH 3 dengan saya serap 1,96 mg/g.
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