Sintesis dan Karakterisasi Adsorben ZnO/SiO2 dengan Sumber SiO2 Dari Sekam Padi Serta Aplikasinya dalam Adsorpsi Ion Fosfat

Dwiyanti, Andhini (2025) Sintesis dan Karakterisasi Adsorben ZnO/SiO2 dengan Sumber SiO2 Dari Sekam Padi Serta Aplikasinya dalam Adsorpsi Ion Fosfat. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Adsorben xZnO/SiO₂ disintesis dengan silika (SiO₂) dari sekam padi dalam proses adsorpsi ion fosfat telah dilakukan. Sintesis diawali dengan ekstraksi SiO₂ dari sekam padi dilanjutkan dengan modifikasi dengan ion Zn2+ melalui metode impregnasi sehingga terbentuk xZnO/SiO₂ (x=0,4; 0,6; 0,8; 1,0; dan 1,2 % w/w SiO₂). Adsorben xZnO/SiO₂ dikarakterisasi dengan XRD dan FTIR, luas permukaan diukur dengan metode MB. Pola difraksi menunjukkan bahwa semua xZnO/SiO₂ amorf dengan puncak gundukan pada 2θ = 21. Spektra FTIR xZnO/SiO₂ sama untuk seluruh adsorben, pada adsorben terimpregnasi ZnO muncul puncak pada 460 470 cm-1 sebagai vibrasi Zn-O. Luas permukaan xZnO/SiO₂ diperoleh antara 9,0751 dan 9,1756 m²/g, adsorben terimpregnasi ZnO 1,2% memiliki luas area lebih tinggi dibandingkan dengan SiO₂. Uji adsorpsi ion fosfat menunjukkan bahwa kondisi optimum dicapai pada waktu kontak selama 150 menit dan dosis adsorben sebesar 0,3 gram. Adsorben 1,2ZnO/SiO₂ memiliki kapasitas adsorpsi tertinggi sebesar 29,9953 mg/g dengan efisiensi penghilangan ion fosfat sebesar 99,984%. Analisis kinetika menunjukkan bahwa proses adsorpsi mengikuti model kinetika orde dua semu dalam penyerapan ion fosfat.
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Adsorbent xZnO/SiO₂ synthesized with silica (SiO₂) from rice husk in the process of phosphate ion adsorption has been carried out. The synthesis begins with the extraction of SiO₂ from rice husk which is continued with modification with Zn2+ ions through the impregnation method to form xZnO/SiO₂ (x=0.4; 0.6; 0.8; 1.0; and 1.2 % w/w SiO₂). Adsorbent xZnO/SiO₂ was characterized by XRD and FTIR, the surface area was measured by the MB method. The diffraction pattern showed that all xZnO/SiO₂ were amorphous with a hump peak at 2θ = 21. The FTIR spectrum of xZnO/SiO₂ was the same for all adsorbents, the impregnated adsorbent appeared a peak at 460 - 470 cm-1 as the vibration of Zn-O. The surface area of xZnO/SiO₂ was obtained between 9.0751 and 9.1756 m²/g, ZnO impregnated adsorbent 1.2% had a higher surface area compared to SiO₂. Phosphate ion adsorption test showed that the optimum condition was achieved at a contact time of 150 minutes and an adsorbent dose of 0.3 grams. The 1.2ZnO/SiO₂ adsorbent had the highest adsorption capacity of 29.9953 mg/g with a phosphate ion removal efficiency of 99.984 percent. Kinetic analysis showed that the adsorption process followed a pseudo second-order kinetic model in the absorption of phosphate ions.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Adsorpsi, Ion Fosfat, Kinetika Orde Dua, Sekam Padi, ZnO/SiO₂, Adsorption, Phosphate Ions, Pseudo-Second-Order Kinetics, Rice Husk
Subjects:	Q Science Q Science > QD Chemistry Q Science > QD Chemistry > QD181.Z6 Zinc oxide Q Science > QD Chemistry > QD547 Flocculation, precipitation, adsorption, etc. Q Science > QD Chemistry > QD63 Extraction
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Andhini Dwiyanti
Date Deposited:	04 Aug 2025 10:23
Last Modified:	04 Aug 2025 10:23
URI:	http://repository.its.ac.id/id/eprint/127137

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