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Suyanti Suyanti
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Journal : Bulletin of Chemical Reaction Engineering

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Optimization and Kinetics of Terbium Leaching from Lapindo Mud using Sulfuric Acid as the Leaching Agent Supriadi, Harry; Suyanti, Suyanti; Astuti, Widi; Handini, Tri; Sujoto, Vincent Sutresno Hadi; Prameswara, Gyan
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 1 Year 2025 (April 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20252

Abstract

This study investigated the impact of solid/liquid ratio, solvent concentration, temperature, and leaching time on the recovery of rare earth elements (REEs), particularly terbium, from Lapindo mud using sulfuric acid as a leaching agent. The objective was to optimize the leaching conditions and identify the most appropriate kinetic model for describing the extraction process. Leaching experiments were conducted under various solid/liquid ratios, sulfuric acid concentrations, temperatures, and time. The findings revealed that the maximum terbium recovery of 94.51% was achieved at a solid/liquid ratio of 0.5, and 18 M sulfuric acid was used as the leaching agent for the extraction process at 200 °C for 30 minutes. Kinetic analysis proved that the Zhuravlev-Leshokin-Templeman (ZLT) model best described the leaching process. The calculated reaction's apparent activation energy (Ea) was 27.96 kJ/mol, indicating that a combination of chemical reactions and diffusion mechanisms controls the leaching process. These insights are crucial for optimizing the extraction of terbium and other REEs from Lapindo mud, offering significant potential for industrial applications in recovering valuable materials from waste sources. Copyright © 2025 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Co-Authors Abdul Rahim Adistya, Fitri Agatha, Jennifer Agus Prasetya Agus Siswanto Albadri, Albadri Alya Reza Ardhita Antriana, Inna Ari Yanto, Eka Nofri Ariffendi, Jefri Ariffendi1, Jefri Ariyanto, Eka Nofri Arvita, Yulia Ayu Idaningsih Bahrul Ilmi Budiartati, Sri Cantika, Triana CINDY CINDY Devi Siti Rahmah Dian Nur Antika Eky Hastuti Eky Hastuti, Dian Nur Antika Elisa, Nova Erna Hernawati, Erna Erni Yanti Natalia, Erni Yanti Evitasari, Desi Fadhilah, Syifa Aulia Fida Rahmantika Hadi, Fida Rahmantika Gulo, Nur’Ainun Gyan Prameswara Handini, Tri Harry Supriadi Hastuti, Dian Nur Antika Eky Irda Sari Jamin Safi Karsiti Karsiti Lia Natalia, Lia Lubis, Nur Kholila Ma'rifah, Atun Raudotul Maya Kartika Sari Monica, Iveren Muhammad Rossy Rachasiwi Mustiah Yulistiani MUSYARROFAH, TAMI MUGHNIATUL natalia, lia natalia Nita Yunianti Ratnasari Novan Ramadhan, Wemphi Nur Hidayah Nurul Marwiyah, Siska Nuryawatilina OPHELIA, CHANDY Panut Mulyono Putri Dewi Aulia Putri, Audrey Regina Pratama Radisti, Mediska Richad, Richad Rodiyatun Rodiyatun, Rodiyatun Ros Ayu Dewi Rusdianto Roestam Safri, Hayanuddin Sentoso, Antony Seputra, Jeremy Kent Setiana, Nina Setiawati, Wiwik Sholihah, Try Fatmah Siregar, Nurintan Asyiah Sodikin Sodikin Sri Yunita subur subur Sudarto Sudarto Sujoto, Vincent Sutresno Hadi Sukestiyarno Sukestiyarno Surya Dharma Suteja, Neneng Euis Citra Intan Vivi Rulviana Wang, Thalia Weni Hastuti Widi Astuti Winoto, Gilbert Yuda Syahidin Yuswardi yuswardi, Yuswardi Yuwansyah, Yeti Zai, Immanuel