Adsorpsi Ion Fosfat oleh Adsorben La2O3/SiO2 dengan Sumber SiO2 dari Sekam Padi

Faraha Aulia, Az Zahra (2025) Adsorpsi Ion Fosfat oleh Adsorben La2O3/SiO2 dengan Sumber SiO2 dari Sekam Padi. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5004211003-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 April 2027. Download (1MB) | Request a copy

Abstract

Sintesis adsorben La₂O₃/SiO₂ dengan metode impregnasi dan evaluasi kemampuan sebagai adsorben untuk adsorpsi ion fosfat telah dilakukan. Sintesis diawali dengan ekstraksi silika (SiO₂) dari abu sekam padi. Impregnasi Lantanum (La) pada SiO2 dilakukan dengan metode larutan berlebih yang dilanjutkan dengan kalsinasi pada 400°C sehingga terbentuk La₂O₃/SiO₂. Material hasil sintesis dikarakterisasi dengan XRD, FTIR. Luas permukaan ditentukan dengan metode adsorpsi metilen biru (MB). Hasil XRD menunjukkan bahwa SiO₂ dari sekam padi memiliki struktur amorf yang terkonfirmasi melalui puncak dengan 2θ = 22°, sedangkan hasil XRD La₂O₃/SiO₂ memiliki struktur amorf dengan fase La₂O₃ yang teridentifikasi pada puncak dengan 2θ = 44°. Spektra FTIR dari SiO₂ dan La₂O₃/SiO₂ menunjukkan perbedaan yang signifikan pada puncak 459 cm-1 yang merupakan puncak La-O. Luas permukaan spesifik La₂O₃/SiO₂ adalah 6,089 m²/g dan SiO₂ sebesar 8,924 m²/g. Material hasil sintesis diuji
untuk adsorpsi ion fosfat dengan metode batch. Adsorpsi ion fosfat optimum dicapai dengan waktu kontak 150 menit dan dosis adsorben 0,25 gram dengan model kinetika adsorpsi ion fosfat mengikuti orde dua emu.
==============================================================================================================================
Synthesis of La₂O₃/SiO₂ adsorbent by impregnation method, and evaluation of its ability as an adsorbent for phosphate ion adsorption has been investigated. Synthesis begins with extraction of silica (SiO₂) from rice husk ash. Lantanum (La) impregnation on SiO2 is carried out by excess
solution method followed by calcination at 400°C to form La₂O₃/SiO₂. The synthesized material was characterized by XRD, FTIR. The surface area was determined by methylene blue (MB) adsorption method. XRD results show that SiO₂ from rice husk has an amorphous structure confirmed by the peak with 2θ = 22°, while the XRD results of La₂O₃/SiO₂ have an amorphous structure with the La₂O₃ phase identified at the peak with 2θ = 44°. FTIR spectra of SiO₂ and La₂O₃/SiO₂ showed significant differences in the peak at 459 cm-1 which is the La-O peak. The specific surface area of La₂O₃/SiO₂ was 6.0889 m²/g and SiO₂ was 8.924 m²/g. The synthesized
materials were tested for phosphate ion adsorption by the batch method. Optimum phosphate ion adsorption was achieved at a contact time of 150 minutes and an adsorbent dose of 0.25 grams with a pseudo-second-order kinetic model of phosphate ion adsorption.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Adsorpsi, Ion Fosfat, La₂O₃/SiO₂, Sekam Padi, Silika Amorf, Adsorption, Phosphate Ions, La₂O₃/SiO₂, Rise Husk, Amorphous Silica
Subjects:	Q Science > QD Chemistry > QD547 Flocculation, precipitation, adsorption, etc.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Faraha Aulia Az Zahra
Date Deposited:	01 Feb 2025 12:54
Last Modified:	01 Feb 2025 12:54
URI:	http://repository.its.ac.id/id/eprint/117442

Actions (login required)

View Item