Desorpsi Logam Tanah Jarang Ytterbium Berbasis Bio Menggunakan Adsorben Membran Nano COS

Claresta, Diaz Gian (2024) Desorpsi Logam Tanah Jarang Ytterbium Berbasis Bio Menggunakan Adsorben Membran Nano COS. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Logam tanah jarang (LTJ) atau Rare Earth Element (REE) terdiri dari unsur Sc, Y, dan 15 unsur lanthanide, salah satunya adalah ytterbium (Yb). Ytterbium digunakan sebagai sensor, doping pada fosforkeramik kapasitor, komponen perangkat elektronik, paduan stainless steel dan mulai dikembangkan untuk perangkat memori serta katalis industri. Ytterbium diolah menggunakan metode hidrometalurgi karena rendahnya kadar dalam mineral dan pada prosesnya dibutuhkan larutan kimia dalam jumlah besar. Oleh karena itu, kadar ytterbium perlu ditingkatkan dengan pretreatment microwave assisted roasting dan ditambahkan NaOH. Kemudian dilakukan water leaching dan leaching per 5 gram dengan 100ml HCl 3M 100 °C 150 rpm selama 4 jam. Metode recovery yang digunakan adalah adsorpsi berbasis bio dengan membran nano chitosan oligosaccharide (COS). Membran nano COS digunakan karena memiliki kemampuan adsorpsi yang baik dan bersifat selektif. Selanjutnya, dilakukan desorpsi dengan parameter temperatur dan konsentrasi agen desorp EDTA. Variasi yang digunakan untuk temperatur adalah 30 °C, 40 °C, dan 50 °C, sedangkan konsentrasi EDTA yang digunakan adalah 0,01 M, 0,05 M, dan 0,1 M. Bahan yang digunakan adalah mineral dari Gorontalo, Indonesia. Pengujian EDX dan XRD dilakukan pada mineral untuk mengetahui komposisi unsur dan senyawa. Larutan leaching, setelah adsorpsi dan desorpsi dilakukan pengujian ICP-MS dan UV-Vis untuk mengetahui konsentrasi ytterbium dalam larutan. Membran nano COS sebelum dan sesudah desorpsi dilakukan pengujian FTIR dan SEM-EDX Mapping. Pada UV-Vis larutan desorpsi, absorbansi meningkat seiring pertambahan konsentrasi kecuali pada EDTA 0,1 M, sedangkan absorbansi turun seiring kenaikan temperatur kecuali pada temperatur tertinggi. Pada FTIR membran desorpsi hasilnya selaras dengan UV-Vis larutan, karakteristik membran mendekati karakteristik awal pada temperatur terendah. Berdasarkan hasil pengujian dan analisis, temperatur dan konsentrasi EDTA berpengaruh pada desorpsi ion ytterbium dengan variasi terbaik adalah konsentrasi EDTA 0,05 M temperatur 35 °C.
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Rare earth elements (REE) consist of Sc, Y, and 15 lanthanide elements, one of which is ytterbium (Yb). Ytterbium is used as a sensor, doping in phosphoric ceramic capacitors, electronic device components, stainless steel alloys and is starting to be developed for memory devices and industrial catalysts. Ytterbium is processed using hydrometallurgical methods due to the low grade in the mineral and the process requires large amounts of chemical solutions. Therefore, the ytterbium content needs to be increased by microwave assisted roasting pretreatment and NaOH added. Then water leaching and leaching per 5 grams with 100ml HCl 3M 100°C 150 rpm for 4 hours. The recovery method used is bio-based adsorption with nano chitosan oligosaccharide (COS) membrane. COS nano membrane is used because it has good adsorption ability and is selective. Furthermore, desorption was carried out with the parameters of temperature and concentration of EDTA desorption agent. The variations used for temperature were 30°C, 40°C, and 50°C, while the EDTA concentrations used were 0.01 M, 0.05 M, and 0.1 M. The materials used were minerals from Gorontalo, Indonesia. EDX and XRD tests were performed on the minerals to determine the composition of elements and compounds. The leaching solution, after adsorption and desorption, was subjected to ICP-MS and UV-Vis testing to determine the concentration of ytterbium in the solution. The nano COS membrane before and after desorption was subjected to FTIR testing and SEM-EDX Mapping. In the UV-Vis of the desorption solution, the absorbance increased with increasing concentration except at 0.1 M EDTA, while the absorbance decreased with increasing temperature except at the highest temperature. In the FTIR of the desorption membrane, the results are in line with the UV-Vis solution, the membrane characteristics are close to the initial characteristics at the lowest temperature. Based on the results of testing and analysis, temperature and EDTA concentration affect the desorption of ytterbium ions with the best variation being the EDTA concentration of 0.05 M at 35°C.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Desorption, EDTA, Nano COS, Temperature,Ytterbium, Desorpsi, EDTA, Nano COS, Temperatur, Ytterbium
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN688 Hydrometallurgy
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Diaz Gian Claresta
Date Deposited:	02 Aug 2024 03:04
Last Modified:	24 Sep 2024 02:16
URI:	http://repository.its.ac.id/id/eprint/110612

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