relation: https://eprints.untirta.ac.id/46561/
title: STUDI PENGARUH PH DAN TEMPERATUR LARUTAN ARTIFICIAL DAN PLS BIJIH LIMONIT TERHADAP MASSA ENDAPAN DAN EFISIENSI ARUS ELECTROWINNING
creator: PARAMITHA, NAFA AULIA
subject: TN Mining engineering. Metallurgy
description: Nickel is one of the metals used as a raw material for the production of industrial and transportation products. Indonesia is one of the largest sources of laterite nickel resources in the world. Generally, laterite nickel is divided into two types: limonite and saprolite. Limonite can be used as a raw material for producing cathodes for electric vehicle batteries, which are currently popular in the automotive industry. Low-grade nickel (limonite) is difficult to process using smelting or pyrometallurgy due to the iron content in limonite ore, which is around 35%, while Ni is approximately 1.3%–1.5%. As a result, limonite ore cannot be economically smelted and is instead processed using hydrometallurgy. Electrowinning, one of the purification methods, operates on the principle of electrolysis. Nickel in the solution is deposited as metallic nickel at the cathode. The aim of the research was to produce as much deposit as possible with a current efficiency of over 50%. The raw materials used were artificial solutions (nickel sulfate hexahydrate, iron (III) sulfate, and H₂SO₄) and limonite nickel PLS (pregnant leach solution). Both raw materials underwent a two-stage iron removal process, and the filtrate was used as the electrolyte for electrowinning. Electrowinning was conducted with variations in pH (4, 8, 12) and temperature (40°C, 50°C, 60°C). The results of electrowinning with the artificial solution at pH 4 and a temperature of 40°C achieved a current efficiency of 61.76% and a deposit mass of 0.0093 g, showing the best results. Limonite nickel PLS showed the best results at pH 4 and a temperature of 60°C, with a deposit mass of 0.0136 g and a current efficiency of 90.22%.
date: 2025-10-23
type: Thesis
type: NonPeerReviewed
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identifier: https://eprints.untirta.ac.id/46561/1/Nafa%20Aulia%20Paramitha_3334200087_Full%20Text.pdf
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identifier: https://eprints.untirta.ac.id/46561/7/Nafa%20Aulia%20Paramitha_3334200087_05.pdf
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identifier: https://eprints.untirta.ac.id/46561/8/Nafa%20Aulia%20Paramitha_3334200087_Lamp.pdf
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identifier: https://eprints.untirta.ac.id/46561/9/Nafa%20Aulia%20Paramitha_3334200087_Ref.pdf
identifier:   PARAMITHA, NAFA AULIA  (2025) STUDI PENGARUH PH DAN TEMPERATUR LARUTAN ARTIFICIAL DAN PLS BIJIH LIMONIT TERHADAP MASSA ENDAPAN DAN EFISIENSI ARUS ELECTROWINNING.  S1 thesis, Fakultas Teknik Universitas Sultan Ageng Tirtayasa.