Optimasi Parameter Konsentrasi Hydrochloric Acid Dan Temperatur Pada Proses Leaching Terhadap Ekstraksi Logam Tanah Jarang Neodymium Dari Konsentrat Monazite

Nurfaizandy, Muhammad Ariyanta (2026) Optimasi Parameter Konsentrasi Hydrochloric Acid Dan Temperatur Pada Proses Leaching Terhadap Ekstraksi Logam Tanah Jarang Neodymium Dari Konsentrat Monazite. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Neodymium (Nd) merupakan salah satu unsur logam tanah jarang yang memiliki peran strategis dalam industri magnet permanen, kendaraan listrik, energi terbarukan, dan perangkat elektronik. Salah satu sumber utama Nd adalah mineral monazite, tetapi keberadaan unsur tanah jarang dalam struktur fosfat yang stabil menyebabkan diperlukan proses pre-treatment sebelum pelindian. Penelitian ini bertujuan menganalisis pengaruh variasi konsentrasi hydrochloric acid (HCl) dan temperatur terhadap ekstraksi Nd dari konsentrat monazite. Konsentrat terlebih dahulu dikarakterisasi menggunakan XRF, XRD, dan EDX, kemudian dilakukan pre-treatment melalui alkaline fusion menggunakan NaOH dan dilanjutkan water leaching. Proses leaching dilakukan menggunakan variasi konsentrasi HCl 2, 3, dan 4 M serta variasi temperatur 70, 80, dan 90 °C dengan rasio solid-to-liquid 1:20, waktu 60 menit, dan agitasi 500 rpm. Kandungan Nd pada filtrat dianalisis menggunakan ICP-MS, sedangkan aqua regia digunakan sebagai pembanding kandungan total Nd. Hasil penelitian menunjukkan bahwa peningkatan konsentrasi HCl tidak selalu meningkatkan pelarutan Nd. Konsentrasi Nd terlarut pada HCl 2, 3, dan 4 M masing-masing sebesar 17.415,91; 14.589,159; dan 16.906,51 mg/kg, sehingga HCl 2 M memberikan hasil tertinggi. Peningkatan temperatur dari 70 hingga 90 °C meningkatkan konsentrasi Nd terlarut dari 16.764,918 menjadi 18.099,18 mg/kg, dengan kenaikan terbesar terjadi pada rentang 70–80 °C dan kemudian cenderung mendekati kondisi plateau. Kondisi terbaik dalam rentang parameter yang diuji diperoleh pada HCl 2 M dan temperatur 90 °C, dengan persentase ekstraksi Nd sebesar 99,59% terhadap pembanding aqua regia.
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Neodymium (Nd) is a strategically important rare earth element widely used in permanent magnets, electric vehicles, renewable energy technologies, and electronic devices. Monazite is one of the major sources of Nd; however, the occurrence of rare earth elements in a chemically stable phosphate structure requires pre-treatment prior to leaching. This study aimed to investigate the effects of hydrochloric acid (HCl) concentration and leaching temperature on Nd extraction from monazite concentrate. The concentrate was initially characterized using XRF, XRD, and EDX, followed by pre-treatment through alkaline fusion using NaOH and subsequent water leaching. The leaching experiments were conducted using HCl concentrations of 2, 3, and 4 M and temperatures of 70, 80, and 90 °C at a solid-to-liquid ratio of 1:20, a leaching time of 60 min, and an agitation speed of 500 rpm. The Nd concentration in the filtrate was determined using ICP-MS, while aqua regia digestion was used as the reference for the total Nd content. The results showed that increasing HCl concentration did not necessarily improve Nd dissolution. The dissolved Nd concentrations obtained at 2, 3, and 4 M HCl were 17,415.91, 14,589.159, and 16,906.51 mg/kg, respectively, indicating that 2 M HCl produced the highest Nd dissolution. Increasing the temperature from 70 to 90 °C increased the dissolved Nd concentration from 16,764.918 to 18,099.18 mg/kg. The largest increase occurred between 70 and 80 °C, followed by a tendency toward a plateau. The best condition within the investigated parameter range was achieved at 2 M HCl and 90 °C, resulting in an Nd extraction efficiency of 99.59% relative to the aqua regia reference.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Neodymium, Monazite, Pelindian, Asam Klorida, Logam Tanah Jarang, Neodymium, Monazite, Leaching, Hydrochloric Acid, Rare earth elements
Subjects:	T Technology > TN Mining engineering. Metallurgy T Technology > TN Mining engineering. Metallurgy > TN688 Hydrometallurgy
Divisions:	Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Muhammad Ariyanta Nurfaizandy
Date Deposited:	27 Jul 2026 01:40
Last Modified:	27 Jul 2026 01:40
URI:	http://repository.its.ac.id/id/eprint/137696

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