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p-Index From 2021 - 2026
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All Journal Journal of Metallurgical Engineering and Processing Technology IJCR (Indonesian Journal of Chemical Research)
Wirasangka, Zanescaya
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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Comparative Analysis of Reagents in Gold and Silver Leaching Process Using the Bottle Roll Test Method Ardiansyah, Rizki; Wisnu Pratami, Nabila Putri; Wirasangka, Zanescaya
Journal of Metallurgical Engineering and Processing Technology Vol 6 No 1 (2025): (August 2025)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v5i2.13952

Abstract

According to Law No. 4 of 2009, mineral processing in Indonesia must be carried out domestically. Cyanide (NaCN) remains the primary reagent in gold extraction due to its efficiency, but its negative environmental impact has driven the development of more environmentally friendly alternative reagents, such as thiosulfate and thiocyanate. This study aims to compare three types of reagents, namely NaCN, EG, and LW, in the gold and silver leaching process using the Bottle Roll Test method. The results show that LW achieved the highest gold extraction rate of 94%, followed by NaCN at 92% and EG at 88%. The best reaction kinetics were observed with LW, which reached maximum extraction within 8 hours. In terms of cost, NaCN was the most economical at 11.29 USD/ton of ore, lower than EG at 12.89 USD/ton and LW at 222.82 USD/ton. This study provides guidance for the gold mining industry in selecting the optimal leaching reagent based on extraction efficiency and cost-effectiveness.
Recovering Lithium, Iron, and Phosphorus from Spent LFP Batteries: A Systematic Review of Short-Process Hydrometallurgical Routes Wirasangka, Zanescaya; Chen, Wei
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 11 No. 2 (2026): Volume 11, ISSUE 2, 2026
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol11.iss2.art1

Abstract

The adoption of electric vehicles has increased end-of-life lithium iron phosphate (LFP) batteries, exposing the limitations of conventional recycling methods that prioritize lithium while undervaluing iron (Fe) and phosphorus (P). This study develops an optimization framework for short-process hydrometallurgical technology to enable efficient recovery of lithium, iron, and phosphorus with high product purity. A Systematic Literature Review (SLR) following the PRISMA 2020 guidelines analyzed 20 eligible studies published between 2021 and 2025 from Scopus, Web of Science, and Google Scholar. The review identifies leaching agent type, temperature, reaction time, and oxidant selection as the key factors affecting recovery performance. Optimized processes achieve lithium recovery above 95%, while converting iron and phosphorus into battery-grade FePO₄ through closed-loop recovery, in-situ precipitation, and impurity removal. Overall, short-process hydrometallurgy offers a technically feasible and economically promising approach for sustainable, full-component battery recycling.
Co-Authors Ardiansyah, Rizki Wei Chen Wisnu Pratami, Nabila Putri