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All Journal Jurnal Rekayasa Proses
Dewi, Jilda Sofiana
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Chemical Engineering, Chemistry & Bioengineering

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Nickel recovery from nickel-containing spent catalyst using atmospheric leaching and oxalate precipitation Widi Astuti; Yuniati, Mutia Dewi; Yuda, Aulia Pertiwi Tri; Sumardi, Slamet; Dewi, Jilda Sofiana; Wanta, Kevin Cleary; Petrus, Himawan Tri Bayu Murti
Jurnal Rekayasa Proses Vol 19 No 2 (2025): Volume 19, Number 2, 2025
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.17589

Abstract

A study has been done to investigate and optimize the recovery of nickel from nickel-containing spent catalyst through sulfuric acid (1 - 2 mol/L) atmospheric leaching in different operation conditions. From the leaching experiments, it was possible to extract 77.95% nickel under the conditions of 2 mol/L H2SO4, reaction time of 5 h, 5% pulp density, and temperature of 80°C. In the next step Ni was selectively precipitated from a sulfuric acid-leached solution using 1 mol/L oxalic acid. The nickel content in the product was 97.29% Ni. Based on the study, sulfuric acid was found to be a suitable leaching agent to extract Ni from the nickel-containing spent catalyst. The study also indicated the effective extraction and recovery of nickel which was well supported by characterization studies using XRD technique.
Extraction of manganese from Indonesian manganese ore using sugarcane bagasse-acid reductive leaching Widi Astuti; Pinania, Kherani Hana; Lesmana, Donny; Dewi, Jilda Sofiana; Supriyadi, Harry; Sumardi, Slamet; Prakosa, Agus
Jurnal Rekayasa Proses Vol 19 No 1 (2025): Volume 19, Number 1, 2025
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.17591

Abstract

In this study, sugarcane bagasse was used as a reducing agent in manganese leaching from manganese ore from Way Kanan, Lampung under acidic conditions using sulfuric acid as a leaching reagent. Bagasse is an agricultural waste from the cane sugar manufacturing industry which is commonly found in Lampung Province. This agricultural waste has the potential to become a reducing agent in manganese leaching because it contains carbon in the form of cellulose and sugar. The optimization of the leaching conditions has been investigated with the parameters of H2SO4 concentration, temperature, and pulp density. The highest manganese leaching recovery was obtained under the following optimized conditions: 1 M H2SO4 concentration, 14 g sugarcane bagasse/20 g MnO2, 50 g/L pulp density, 80 °C leaching temperature, 200 rpm stirring rate, and 4 hours of reaction time. The present process therefore deals with achieving the effective recovery of value-added products from low-grade manganese ore using agriculture waste as reducing agent.
Co-Authors Donny Lesmana Harry Supriadi Himawan Tri Bayu Murti Petrus Kevin Cleary Wanta Marjunus, Roniyus Nainggolan, Nurul Istiqomah Pinania, Kherani Hana Prakosa, Agus Slamet Sumardi, Slamet Supriyadi, Harry Supriyatna, Yayat Iman Widi Astuti Yuda, Aulia Pertiwi Tri Yuniati, Mutia Dewi