PENGARUH VARIASI SUHU LARUTAN ASAM SITRAT MENGGUNAKAN METODE LEACHING TERHADAP KARAKTERISTIK SILIKA BATANG PADI

Eki Yusmana, 1517041118 (2021) PENGARUH VARIASI SUHU LARUTAN ASAM SITRAT MENGGUNAKAN METODE LEACHING TERHADAP KARAKTERISTIK SILIKA BATANG PADI. FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM, UNIVERSITAS LAMPUNG.

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Abstrak (Berisi Bastraknya saja, Judul dan Nama Tidak Boleh di Masukan)

Telah dilakukan penelitian pengaruh variasi suhu larutan asam sitrat menggunakan metode leaching terhadap karakteristik silika batang padi. Suhu kalsinasi yang digunakan yaitu 700oC. Metode yang dilakukan ialah preparasi batang padi, sintesis silika batang padi variasi suhu asam sitrat menggunakan metode leaching, dan pembakaran batang padi hasil leaching asam sitrat. Pengujian dilakukan untuk memperoleh silika murni. Tujuan dilakukan percobaan yaitu mengetahui sifat termal silika, komposisi unsur silika, fase terbentuk silika, gugus fungsi yang terbentuk pada silika, dan karakteristik morfologi pada silika. Hasil penelitian diperoleh lima analisis yaitu analisis TGA (Thermo Gravimetric Analysis) pada RSA (Rice Straw Ash) 30° C mengalami penyusutan sebesar 32,39% dan RSA 80° C mengalami penyusutan sebesar 30,44%. Analisis DTA (Differential Thermal Analysis) pada RSA 30° C dan RSA 80° C menunjukan dua puncak eksotermik dan satu puncak endotermik. Analisis XRF (X – Ray Fluoroscence) menunjukan hasil silika tertinggi pada suhu 100° C yaitu sebesar 97,459 %. Analisis XRD (X-Ray Diffraction) menunjukan struktur amorf dengan puncak tertinggi berturut-turut pada RSA 30° C, RSA 60° C, RSA 70° C, RSA 80° C, RSA 90° C, dan RSA 100° C sebesar 19,545°, 21,185°, 22,004°, 20,162°, 19,86°, serta 22,278°. Analisis FTIR (Fourier Transform Infra- Red) menunjukan gugus fungsi yang terbentuk yaitu –OH, Si-O-Si dan Si-O. Analisis SEM (Scanning Electron Microscopy) menunjukan bahwa semakin tinggi suhu leaching asam sitrat yang dilakukan maka ukuran butir semakin merata. Kata Kunci: Batang Padi, Silika, Leaching. Research has been carried out on the effect of variations in temperature of citric acid solution using the leaching method on the silica characteristics of rice straws. Calcination temperature used is 700oC. The methods used were the preparation of rice straws, the synthesis of silica from rice straws with variations in temperature of citric acid using the leaching method, and burning of rice stems from citric acid leaching. Tests were carried out to obtain pure silica. The purpose of the experiment was to determine the thermal properties of silica, the elemental composition of silica, the phase formed by silica, functional groups formed in silica, and morphological characteristics of silica. The results obtained five analyzes, namely TGA analysis (Thermo Gravimetric Analysis) at RSA (Rice Straw Ash) 30°C experienced a shrinkage of 32.39% and RSA 80°C experienced a depreciation of 30.44%. DTA (Differential Thermal Analysis) analysis at RSA 30° C and RSA 80° C showes two exothermic peaks and one endothermic peak. XRF (X – Ray Fluoroscence) analysis showed the highest silica yield at a temperature of 100°C, which was 97.459%. XRD (X-Ray Diffraction) analysis showed an amorphous structure with the highest peaks at RSA 30° C, RSA 60° C, RSA 70° C, RSA 80° C, RSA 90° C, and RSA 100° C of 19,545. °, 21,185 °, 22,004 °, 20,162 °, 19,86 °, and 22.278 °. FTIR (Fourier Transform Infra-Red) analysis shows that the functional groups formed are –OH, Si-O-Si and Si-O. SEM (Scanning Electron Microscopy) analysis shows that the higher the citric acid leaching temperature, the more evenly distributed the grain size. Keywords: Rice Straw, Silica, Leaching.

Jenis Karya Akhir:	Skripsi
Subyek:	500 ilmu pengetahuan alam dan matematika > 530 Fisika
Program Studi:	FAKULTAS MIPA > Prodi Fisika
Pengguna Deposit:	AM.d Firlia Hidayah
Date Deposited:	22 Sep 2022 04:42
Terakhir diubah:	22 Sep 2022 04:42
URI:	http://digilib.unila.ac.id/id/eprint/66237

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