Scholarlink

<p>The rising demand for scandium (Sc) in aerospace, fuel cells, and electronics requires sustainable extraction technologies. This study investigates scandium recovery from Indonesian limonitic laterite ore using atmospheric pressure acid leaching (APAL) with sulfuric acid (H<sub>2</sub>SO<sub>4</sub>) and acetic acid (CH<sub>3</sub>COOH) as lixiviants. Leaching temperature (30–90&#xa0;°C) and pH (ranging from − 1.2 to 1.24 for H<sub>2</sub>SO<sub>4</sub>; 2.13 to 2.87 for CH<sub>3</sub>COOH) were varied to evaluate their influence on extraction efficiency. Response Surface Methodology (RSM) was applied to model process performance and identify optimal conditions. Results showed that lower pH (i.e., more acidic conditions) and higher temperatures significantly enhanced scandium recovery. Sulfuric acid achieved a maximum recovery of 92.94% at 90&#xa0;°C and pH − 1.2, while acetic acid reached 56.47% at 90&#xa0;°C and pH 2.13. XRF analysis confirmed scandium content of 79 ppm in the ore, indicating its potential as a feedstock for critical metal extraction. Compared to high-pressure acid leaching, the APAL approach offers a lower-energy, safer, and cost-effective alternative, especially in decentralized or infrastructure-limited regions. The use of acetic acid also presents a more environmentally friendly option. This study advances sustainable hydrometallurgical practices for scandium recovery from lateritic ores.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Towards sustainable scandium extraction: atmospheric sulfuric acid leaching of Indonesian lateritic nickel ore

  • 期刊论文

  • 发表日期：

    2025年11月13日

查看全文
  • Mohammad Fahrurrozi,
  • Vincent Sutresno Hadi Sujoto,
  • Fathin Bagusantara,
  • Iqbal Iryawan,
  • Eunike Petricia,
  • Widi Astuti,
  • Siti Nurul Aisyiyah Jenie,
  • Ferian Anggara,
  • Nafisa Rahmah,
  • Himawan Tri Bayu Murti Petrus

摘要

The rising demand for scandium (Sc) in aerospace, fuel cells, and electronics requires sustainable extraction technologies. This study investigates scandium recovery from Indonesian limonitic laterite ore using atmospheric pressure acid leaching (APAL) with sulfuric acid (H2SO4) and acetic acid (CH3COOH) as lixiviants. Leaching temperature (30–90 °C) and pH (ranging from − 1.2 to 1.24 for H2SO4; 2.13 to 2.87 for CH3COOH) were varied to evaluate their influence on extraction efficiency. Response Surface Methodology (RSM) was applied to model process performance and identify optimal conditions. Results showed that lower pH (i.e., more acidic conditions) and higher temperatures significantly enhanced scandium recovery. Sulfuric acid achieved a maximum recovery of 92.94% at 90 °C and pH − 1.2, while acetic acid reached 56.47% at 90 °C and pH 2.13. XRF analysis confirmed scandium content of 79 ppm in the ore, indicating its potential as a feedstock for critical metal extraction. Compared to high-pressure acid leaching, the APAL approach offers a lower-energy, safer, and cost-effective alternative, especially in decentralized or infrastructure-limited regions. The use of acetic acid also presents a more environmentally friendly option. This study advances sustainable hydrometallurgical practices for scandium recovery from lateritic ores.

Graphical abstract