Analisis Pengaruh Kuat Arus Dan Waktu Terhadap Desorpsi-Recovery Neodymium Pada Proses Elektrodialisis Berbasis Membran Nano-Kitosan Oligasakarida

Wardhana, R. Adrian Bima (2026) Analisis Pengaruh Kuat Arus Dan Waktu Terhadap Desorpsi-Recovery Neodymium Pada Proses Elektrodialisis Berbasis Membran Nano-Kitosan Oligasakarida. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Neodymium (Nd) merupakan salah satu unsur tanah jarang yang berperan strategis dalam teknologi modern, terutama sebagai bahan utama magnet permanen NdFeB untuk kendaraan listrik, turbin angin, dan perangkat elektronik. Peningkatan kebutuhan Nd mendorong pengembangan teknologi pemulihan yang lebih efisien dan berkelanjutan. Penelitian ini bertujuan menganalisis pengaruh kuat arus dan waktu terhadap efektivitas desorpsi–recovery Nd serta mengevaluasi kinerja membran nano-kitosan oligosakarida selama proses elektrodialisis. Konsentrat monazite sebagai sumber Nd diproses melalui alkaline fusion, water leaching, leaching menggunakan HCl, presipitasi, adsorpsi menggunakan membran nano-kitosan oligasakarida, dan dilanjutkan desorpsi dalam larutan HCl melalui elektrodialisis. Variasi kuat arus yang digunakan adalah 0,5 A, 1 A, dan 1,5 A dengan waktu proses 15, 30, 45, dan 60 menit. Karakterisasi dilakukan menggunakan XRF, XRD, SEM-EDX, FTIR, dan ICP-MS. Hasil penelitian menunjukkan bahwa kuat arus dan waktu berpengaruh terhadap efektivitas desorpsi Nd³⁺. Pada waktu pengujian yang sama, peningkatan kuat arus secara umum meningkatkan konsentrasi dan efisiensi desorpsi dengan urutan hasil 1,5 A > 1 A > 0,5 A. Namun, pengaruh waktu tidak sepenuhnya linier pada kuat arus 1,5 A karena konsentrasi dan efisiensi desorpsi mengalami penurunan setelah mencapai kondisi tertinggi pada menit ke-45. Konsentrasi Nd tertinggi pada variasi 0,5 A, 1 A, dan 1,5 A masing-masing sebesar 5.261,71 ppm pada 60 menit, 6.028,84 ppm pada 60 menit, dan 7.214,86 ppm pada 45 menit. Kondisi terbaik dalam rentang pengujian diperoleh pada 1,5 A selama 45 menit dengan efisiensi desorpsi 74,04%, sedangkan perpanjangan waktu hingga 60 menit menurunkan efisiensi menjadi 71,17%. Hasil FTIR menunjukkan bahwa proses desorpsi menyebabkan perubahan lingkungan gugus fungsi yang berkaitan dengan pelepasan Nd³⁺, sementara karakteristik kimia utama membran nano-kitosan oligasakarida masih dapat dikenali setelah proses desorpsi. Dengan demikian, kombinasi kuat arus dan waktu menentukan efektivitas desorpsi Nd, sedangkan membran menunjukkan potensi untuk diregenerasi dan digunakan kembali, meskipun diperlukan pengujian siklus berulang untuk membuktikan kemampuan tersebut.
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Neodymium (Nd) is one of the rare earth elements that plays a strategic role in modern technologies, particularly as a primary component of NdFeB permanent magnets used in electric vehicles, wind turbines, and electronic devices. The increasing demand for Nd has encouraged the development of more efficient and sustainable recovery technologies. This study aims to analyze the effects of current strength and time on the effectiveness of Nd desorption–recovery and to evaluate the performance of a nano-chitosan oligosaccharide membrane during the electrodialysis process. Monazite concentrate, used as the Nd source, was processed through alkaline fusion, water leaching, HCl leaching, precipitation, adsorption using a nano-chitosan oligosaccharide membrane, and subsequent desorption in an HCl solution through electrodialysis. The applied current strengths were 0.5 A, 1 A, and 1.5 A, with processing times of 15, 30, 45, and 60 minutes. Characterization and analysis were conducted using XRF, XRD, SEM–EDX, FTIR, and ICP-MS. The results showed that current strength and processing time affected the effectiveness of Nd³⁺ desorption. At the same processing time, increasing the current strength generally increased the Nd concentration and desorption efficiency, following the order of 1.5 A > 1 A > 0.5 A. However, the effect of processing time was not completely linear at 1.5 A because the Nd concentration and desorption efficiency decreased after reaching their maximum values at 45 minutes. The highest Nd concentrations obtained at 0.5 A, 1 A, and 1.5 A were 5,261.71 ppm at 60 minutes, 6,028.84 ppm at 60 minutes, and 7,214.86 ppm at 45 minutes, respectively. The best condition within the investigated range was achieved at 1.5 A for 45 minutes, with a desorption efficiency of 74.04%, while extending the process to 60 minutes decreased the efficiency to 71.17%. FTIR analysis showed that the desorption process altered the functional-group environment associated with Nd³⁺ release, while the main chemical characteristics of the nano-chitosan oligosaccharide membrane remained identifiable after the process. Therefore, the combination of current strength and processing time determines the effectiveness of Nd desorption, while the membrane shows potential for regeneration and reuse, although repeated-cycle testing is required to confirm this capability.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Neodymium, Rare Earth Elements, Biosorpsi, Elektrodialisis, Membran Nano-Kitosan Oligasakarida,Neodymium, Rare Earth Elements, Biosorption, Electrodialysis, Nano-Chitosan Oligasaccharide Membrane
Subjects:	T Technology > TN Mining engineering. Metallurgy
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	R.adrian Bima Wardhana
Date Deposited:	26 Jul 2026 03:13
Last Modified:	26 Jul 2026 03:13
URI:	http://repository.its.ac.id/id/eprint/137346

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