Widyanugraha, Rio Mahesa (2025) Efektivitas Jenis Reagen, Temperatur Dan Waktu Leaching Serta Ketebalan Membran Nano-Chitosan Oligosaccharide Pada Ekstraksi Ytterbium Dengan Metode Biosorpsi. Masters thesis, Insitut Teknologi Sepuluh Nopember.
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Abstract
Memasuki abad ke-21 permintaan Rare earth elements (REE) di dunia terus mengalami peningkatan sehingga menyebabkan terbatasnya pasokan REE. Indonesia merupakan salah satu negara yang berpotensi menghasilkan cadangan REE. Ytterbium merupakan salah satu logam tanah jarang yang dapat ditemukan pada mineral xenotime dan monasite. Ekstraksi ytterbium ini dilakukan dengan metode yang ramah lingkungan yaitu menggunakan larutan asam dalam proses leaching dan membran nano chitosan oligosaccharides (COS) sebagai biosorben untuk proses recovery. Proses recovery ytterbium dibagi menjadi dua yaitu adsorpsi dan desorpsi. Penelitian ini memiliki tujuan untuk mengetahui parameter yang optimal pada proses leaching melalui simulasi FactSage dan menganalisis pengaruh jenis larutan leaching, serta menganalisis pengaruh ketebalan membran nano-COS. Ore yang digunakan berasal dari Gorontalo, Indonesia. Ore terlebih dahulu dilakukan pengujian EDX dan XRD untuk mengetahui unsur dan senyawanya. Selanjutnya ore dilakukan proses grinding, panning, dan roasting. Hasil simulasi FactSage diterapkan pada proses leaching. Larutan hasil leaching dilakukan pengujian ICP-OES dan UV-Vis untuk mengetahui konsentrasi ytterbium di dalam larutan leaching. Selanjutnya, dilakukan proses adsorpsi menggunakan membran nano COS dengan ketebalan yang berbeda beda dan dilanjutkan dengan proses desorpsi menggunakan EDTA. Simulasi FactSage dianggap belum mampu memprediksi hasil leaching yang akurat untuk logam ytterbium, sedangkan hasil eksperimental leaching menunjukkan parameter yang optimal yaitu menggunakan HCl dengan konsentrasi 3M temperatur 100℃. Ketebalan membran nano-COS berpengaruh terhadap adsorpsi ytterbium. Membran dengan ketebalan 2 mm dapat mengikat ytterbium dengan kadar yang lebih banyak dengan 63% ytterbium teradsorp. Perhitungan isoterm adsorpsi menunjukkan kesesuaian terhadap model Freundlich, kinetika adsorppsi ytterbium menunjukkan kesesuaian terhadap persamaan pseudo second order, intra partikel difusi model menunjukkan bahwa laju adsorpsi pada membran 1 mm dan 2 mm dipengaruhi faktor lain diluar difusi intrapartikel
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Entering the 21st century, the global demand for Rare Earth Elements (REE) continues to increase, resulting in a limited supply of REE. Indonesia is one of the countries with the potential to produce REE reserves. Ytterbium is one of the
rare earth metals that can be found in the minerals xenotime and monazite. The extraction of ytterbium is carried out using an environmentally friendly method, namely through acid solution in the leaching process and using nano chitosan oligosaccharides (COS) membranes as biosorbents for the recovery process. The ytterbium recovery process is divided into two steps: adsorption and desorption. This study aims to determine the optimal parameters in the leaching process through FactSage simulations, analyze the effect of different leaching solution types, and investigate the effect of the thickness of the nano-COS membrane. The ore used comes from Gorontalo, Indonesia. The ore was first tested with EDX and XRD to determine its elements and compounds. Then, the ore underwent grinding, panning, and roasting processes. The results of the FactSage simulation were applied to the leaching process. The leachate was tested using ICP-OES and UV-Vis to determine the ytterbium concentration in the leaching solution. Next, the adsorption process was carried out using nano-COS membranes with different thicknesses, followed by desorption using EDTA. The FactSage simulation was considered unable to accurately predict the leaching results for ytterbium, while the experimental leaching results showed that the optimal parameters were using HCl with a concentration of 3M at 100℃. The thickness of the nano-COS membrane affects the adsorption of ytterbium. A 2 mm thick membrane could bind more ytterbium, with 63% of ytterbium adsorbed. The adsorption isotherm calculation showed compatibility with the Freundlich model, and the ytterbium adsorption kinetics followed the pseudo-second-order equation. The intra-particle diffusion model showed that the adsorption rate on 1 mm and 2 mm membranes was influenced by factors other than intra-particle diffusion
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Adsorpsi, Kinetika, Isoterm , Nano Chitosan Oligosaccharides, Rare Earth Element |
| Subjects: | T Technology > TN Mining engineering. Metallurgy > TN688 Hydrometallurgy |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 27101-(S2) Master Thesis |
| Depositing User: | Rio Mahesa Widyanugraha |
| Date Deposited: | 03 Feb 2025 10:11 |
| Last Modified: | 03 Feb 2025 10:11 |
| URI: | http://repository.its.ac.id/id/eprint/117471 |
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