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All Journal Jurnal Pengabdian Kepada Masyarakat Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran
Artanti Estiningtyas
Universitas Negeri Semarang
Computer Science & IT Education Languange, Linguistic, Communication & Media Public Health Other

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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.
Pemberdayaan Masyarakat melalui Pemanfaatan Limbah Cair Kolam Lele dan Cangkang Udang sebagai Pupuk Organik Cair Bernilai Ekonomi di Kelurahan Pakintelan Maharani Kusumaningrum; Widi Astuti; Radenrara Dewi Artanti Putri; Retno Mayasari; Alfita Ilfiyaningrum; Artanti Estiningtyas; Berliana Putri Rahmalia; Elvina Belva Fithriyah; Anin Bimarhamah; Hidayatul Munadhiroh
Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 3 (2026): September: Jurnal Pengabdian Kepada Masyarakat
Publisher : Sekolah Tinggi Pastoral Kateketik Santo Fransiskus Assisi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jpkm.v5i3.678

Abstract

Community service is a program designed to enhance community knowledge and skills in processing catfish aquaculture wastewater into liquid organic fertilizer (LOF) by utilizing pond wastewater and shrimp shell soaking water. This program includes field observation, socialization, demonstrations of liquid organic fertilizer production, and community assistance during the fermentation process, as well as the environmentally friendly utilization of organic waste. The program is intended to increase public awareness that catfish farming wastewater and shrimp shell waste have the potential to be utilized as raw materials for liquid organic fertilizer, thereby supporting the implementation of a circular economy within the community. The objective of this community service activity is to improve community knowledge, skills, and awareness in managing organic waste into value-added products while reducing environmental pollution. The method employed is technology transfer using a participatory approach, consisting of observation, socialization, demonstration, and evaluation stages. The results showed that participants gained a better understanding of the liquid organic fertilizer production process, acquired practical skills in converting aquaculture waste into alternative fertilizer, and developed greater awareness of the importance of sustainable waste management. This community service program is expected to promote community self-reliance in utilizing organic waste, increase its economic value, and support environmental sustainability.
Co-Authors Alfita Ilfiyaningrum Anin Bimarhamah Aryo Baskoro Utomo Berliana Putri Rahmalia Catur Rini Widyastuti Danang Subarkah Hadikawuryan Elvina Belva Fithriyah Hidayatul Munadhiroh Indah Cahyani Puspitaningrum Maharani Kusumaningrum Mayasari, Retno Muhammad Olvianas Radenrara Dewi Artanti Putri Rizki Setiadi Shafa Noviandrea Towidjojo Siti Ajeng Muslimah Widi Astuti