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Rizki Setiadi
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Hydrometallurgical Recovery of Cobalt from Spent Lithium-Ion Battery (LiCoO2) using Organic Acids Catur Rini Widyastuti; Artanti Estiningtyas; Indah Cahyani Puspitaningrum; Siti Ajeng Muslimah; Shafa Noviandrea Towidjojo; Danang Subarkah Hadikawuryan; Rizki Setiadi; Aryo Baskoro Utomo; Muhammad Olvianas
Rekayasa Vol. 23 No. 2 (2025)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v23i2.40853

Abstract

The increasing use of portable electronic devices has led to an increase in lithium-ion battery (LiB) waste, which contains hazardous metals such as cobalt. It is noteworthy that cobalt accounts for up to 30% of the battery weight, significantly higher than its concentration in natural ores (<1%). Conventional recovery methods use strong inorganic acids (e.g., H₂SO₄, HCl), which are effective but produce hazardous wastewater and require complex treatment procedures. In this study, the cobalt extraction process was carried out using a hydrometallurgical method using organic acids, specifically ascorbic acid and citric acid. The extraction process was carried out with variations in organic acid concentrations ranging from 0.5 M to 2.5 M at temperatures of 55°C and 70°C. The extracted liquid was collected and analyzed for cobalt content using an Atomic Absorption Spectrophotometer (AAS). The cobalt leaching process using citric acid successfully dissolved 13.58–13.89 mg/L of cobalt. Meanwhile, from the leaching process with ascorbic acid, dissolved cobalt was obtained in the range of 10.96–12.87 mg/L. Based on the data obtained from the leaching process using organic acids, it can be seen that the best leaching process was obtained with citric acid at a concentration of 0.5 M at a temperature of 55°C, which produced 13,837 mg/L of dissolved cobalt. The extracted cobalt can be used for the synthesis of cobalt acetate, which is a fine chemical. However, not all cobalt dissolved in the leaching process can be precipitated to produce cobalt acetate. Of all the leaching solutions with both organic acids at different concentrations, only the solution from the leaching process with ascorbic acid at a concentration of 0.5 M was successfully precipitated and further synthesized into cobalt acetate with a yield of 17.42 wt%. In addition, FTIR analysis confirmed that the synthesized cobalt acetate was consistent with the reference cobalt(II) acetate tetrahydrate, with the difference in intensity indicating lower hydration in the synthesized sample.
Co-Authors , Khoirul Huda Abdurrahman Abdurrahman Aldias Bahatmaka Andi Abdullah Ghyferi Angga Septiyanto Ari Dwi Nur Indriawan Musyono Artanti Estiningtyas Aryo Baskoro Utomo Budiman, Febrian Arif Catur Rini Widyastuti Danang Subarkah Hadikawuryan F Pambudi Widiatmaka Fiqri Fadillah Fahmi Fitriyana, Deni Fajar Hanif Hidayat Heri Yudiono Hidayat, Hanif I Made Sudana Imam Sukoco Imanu Danar Herunandi Indah Cahyani Puspitaningrum Iskandar, Ranu Khoirul Huda Khoirul Huda Listiyono Budi Moch Faizal Rachmadi Muhammad Olvianas Muhammad Yusuf Wibowo Pudji Astuti R. Ambar Kuntoro Mursid Gendroyono Rafif Dimas Pratama Rizqi Fitri Naryanto Rusiyanto Rusiyanto Rusiyanto Salim Salim Shafa Noviandrea Towidjojo Siti Ajeng Muslimah Sri Handyani Sudiyono Tri Joko Raharjo Wahyu Caesarendra Widiyanto Widiyanto Wirawan Sumbodo