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Asiyah Nurrahmajanti
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Dentistry Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Veterinary

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Pengaruh Variasi Konsentrasi Asam dan Variasi Pengendap pada Sintesis Besi Oksida dari Limbah Karat Besi Asiyah Nurrahmajanti; Anisya Lisdiana
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 4 (2025): Agustus 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i4.6145

Abstract

Iron commodities are one of the very important commodities and are used in various sectors. The supply of iron and its derivatives has so far relied solely on mining results. However, the impact of mining results can be detrimental from geological, environmental, and health perspectives. One potential that is often overlooked is iron rust waste. The synthesis of iron oxide pigments from iron rust waste can be done using the precipitation method with variations of 1M and 4M HCl concentration and variations of the precipitant NH4OH 4M and NaOH 4M. The synthesized iron oxide shows red solids for the NaOH precipitant variation and blackish-red for the NH4OH precipitant. EDS results indicate that the NH4OH precipitant generates purer iron oxide pigments compared to NaOH. In the SEM testing, it was observed that iron oxide was successfully synthesized with a crystalline phase, namely the formation of rhombohedral crystals in the HEM2 and HEM4 variation, as evidenced by XRD testing showing 11 peaks at 2θ(º) 24.2; 33.3; 35.6; 41; 49.6; 54.2; 57.7; 62.5; 64.1; 69.7; and 72.1 compared to JCPDS 33-0664.
Pelindian Fe₂O₃ dari Limbah Karat Besi Menggunakan HCl dan H₂C₂O₄ Asiyah Nurrahmajanti
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 1 (2025): Februari 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i1.4861

Abstract

This study aims to extract iron(III) oxide (Fe₂O₃) from iron rust waste using a leaching method with hydrochloric acid (HCl) and oxalic acid (H₂C₂O₄). After the leaching process with acids, precipitation was carried out using sodium hydroxide (NaOH) solution. The variation in acid type was conducted to evaluate the leaching effectiveness based on the Fe₂O₃ yield obtained. The results showed that HCl was more effective in dissolving Fe₂O₃ compared to H₂C₂O₄. The yields obtained from each acid type were 64.44% for HCl and 24.39% for H₂C₂O₄. The precipitation process was performed at a pH of 5–7 to ensure the formation of a stable Fe(OH)₃ precipitate before being dried into Fe₂O₃. Qualitative analysis using potassium hexacyanoferrate(III) (K₄[Fe(CN)₆]) confirmed the presence of Fe³⁺ ions in the final product from both acid treatments. This method has proven to be effective in obtaining high-quality Fe₂O₃ that can be used in various industrial and research applications. Additionally, this study contributes to the utilization of iron rust waste as a valuable precursor material for direct use or further processing while also reducing environmental pollution.
Co-Authors Anisya Lisdiana