Sintesis Dan Kinerja Adsorben Fe2O3/SiO2 Dengan Sumber SiO2 Dari Sekam Padi Dalam Adsorpsi Ion Fosfat

Ramadhani, Arvino Adi (2026) Sintesis Dan Kinerja Adsorben Fe2O3/SiO2 Dengan Sumber SiO2 Dari Sekam Padi Dalam Adsorpsi Ion Fosfat. Other thesis, Insititut Teknologi Sepuluh Nopember.

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Abstract

Pada penelitian ini, silika (SiO2) dari sekam padi digunakan sebagai adsorben ion fosfat setelah diimpregnasi dengan Fe2O3, sehingga membentuk xFe2O3/SiO2. Ion Fe3+ sebagai prekursor ditambahkan ke SiO2 melalui metode impregnasi untuk membentuk xFe2O3/SiO2 (x=0,5; 0,7; 0,9; 1,1; dan 1,3% w/w SiO2). Adsorben xFe2O3/SiO2 dikarakterisasi dengan XRD dan FTIR, luas permukaannya diukur dengan metode metilen biru (MB). Pola difraksi menunjukkan bahwa semua xFe2O3/SiO2 bersifat amorf dengan puncak 2θ ≈ 22°. Spektrum inframerah xFe2O3/SiO2 pada semua adsorben menunjukkan puncak pada 800 cm-1 sebagai vibrasi tekuk ikatan Si-O-Si, puncak sekitar 1100 cm-1 dari vibrasi ulur ikatan Si-O dan didukung oleh puncak sekitar 460-500 cm-1. Puncak ikatan Fe-O muncul dalam rentang 400-600 cm-1, tetapi tumpang tindih dengan vibrasi Si-O silika amorf. Luas permukaan xFe2O3/SiO2 diperoleh antara 8,926 m2/g dan 9,004 m2/g. Uji adsorpsi ion fosfat menunjukkan bahwa kondisi optimum tercapai pada waktu kontak 180 menit dan dosis adsorben 0,3 g. Adsorben 1,3Fe2O3/SiO2 memiliki kapasitas adsorpsi tertinggi sebesar 2,979 mg/g dengan persentase efisiensi penghilangan ion fosfat sebesar 99,32%. Analisis kinetik menunjukkan bahwa proses adsorpsi mengikuti model kinetik pseudo-orde kedua dalam adsorpsi ion fosfat. Pengujian kelarutan ion fosfat dari adsorben setelah adsorpsi menunjukkan proses adsorpsi kimia atau kemisorpsi ion fosfat.
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In this study, silica (SiO2) from rice husk was used as an adsorbent of phosphate ions after being impregnated with Fe2O3, thus forming. Fe3+ ions as precursors were added to SiO2 through the impregnation method to form xFe2O3/SiO2 (x=0.5; 0.7; 0.9; 1.1; and 1.3% w/w SiO2). The xFe2O3/SiO2 adsorbent was characterized by XRD and FTIR, the surface area was measured by the MB method. The diffraction pattern showed that all xFe2O3/SiO2 were amorphous with a peak of 2θ ≈ 22°. The infrared spectra of xFe2O3/SiO2 on all adsorbents showed a peak at 800 cm-1 as the bending vibration of Si-O-Si bonds, the peak around 1100 cm-1 from the stretching vibration of the Si-O bonds and support by the peak around 60-500 cm-1 . The peak of the actual Fe-O bond appears in the range of 400-600 cm-1 , but overlapped with the Si-O vibration of amorphous silica. The surface area of xFe2O3/SiO2 was obtained between 8.926 m2 /g and 9.004 m2 /g. The phosphate ion adsorption test showed that the optimum condition was achieved at a contact time of 180 minutes and an adsorbent dose of 0.3 g. The 1,3Fe2O3/SiO2 adsorbent had the highest adsorption capacity of 2.979 mg/g with a percentage of phosphate ion removal efficiency of 99.32%. Kinetic analysis shows that the adsorption process follows a pseudosecond-order kinetic model in the adsorption of phosphate ions. Testing the solubility of phosphate ions from the adsorbent after adsorption indicates a chemical adsorption or chemisorption process of phosphate ions.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Adsorpsi, Fe2O3/SiO2, Ion Fosfat, Kinetika Orde Dua Semu, Sekam Padi,Adsorption, Fe2O3/SiO2, Phospate Ions, Pseudo-Second-Order Kinetics, Rice Husk.
Subjects:	Q Science > QD Chemistry > QD501 Catalysis. Catalysts.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Arvino Adi Ramadhani
Date Deposited:	03 Feb 2026 07:33
Last Modified:	03 Feb 2026 07:33
URI:	http://repository.its.ac.id/id/eprint/131779

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