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All Journal Jurnal Rekayasa Proses Jurnal Sains dan Teknologi CHEMICA Jurnal Teknik Kimia IJOG : Indonesian Journal on Geoscience Seminar Nasional Teknik Kimia Kejuangan Program Kreativitas Mahasiswa - Kewirausahaan Journal of Tropical Biodiversity and Biotechnology Journal of Geoscience, Engineering, Environment, and Technology Metal Indonesia Indonesian Journal of Chemistry Buletin Sumber Daya Geologi Jurnal Rekayasa Proses Prosiding Seminar Nasional Sains dan Teknologi Terapan Metalurgi INSIST (International Series on Interdisciplinary Research) International Journal of Applied Sciences and Smart Technologies ASEAN Journal of Chemical Engineering Indonesian Journal on Geoscience Indonesian Journal on Geoscience REACTOR : Journal of Research On Chemistry And Engineering ARTCHIVE: Indonesia Journal of Visual Art and Design Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Proceeding ISETH (International Summit on Science, Technology, and Humanity) Metalurgi Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Rekayasa Proses
Himawan Tri Bayu Murti Petrus
Departemen Teknik Kimia, Fakultas Teknik, Universitas Gadjah Mada, Jl Grafika No. 2 Kampus UGM, Yogyakarta, 55281
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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Journal : Indonesian Journal of Chemistry

 1 
Low-Grade Ilmenite Leaching Kinetics Using Hydrochloric Acid: RSM and SCM Approaches Supriyatna, Yayat Iman; Prasetya, Agus; Astuti, Widi; Sumardi, Slamet; Natalia, Priskila; Adythia, Dicky Marsa; Petrus, Himawan Tri Bayu Murti
Indonesian Journal of Chemistry Vol 24, No 3 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.79092

Abstract

Minerals containing TiO2 are common in Indonesia, such as ilmenite in iron sand deposits scattered along the country's coasts. Ilmenite is an important source of titanium. One method for making TiO2 from ilmenite is by solubilizing both the Fe and Ti elements in HCl and then immediately hydrolyze the Ti. The leaching of low-grade ilmenite (ground to 0.177-0.149 mm) is studied kinetically by HCl in a stirred reactor. The research was conducted using the caustic fusion method followed by HCl leaching. The leaching reaction kinetics at the optimum conditions are analyzed using response surface methodology (RSM) with a second-order polynomial equation model and SSE with the shrinking core model (SCM). The results showed that HCl concentration and leaching time were directly proportional to the leached titanium concentration. In contrast, the leaching temperature was inversely proportional. The optimum operating conditions were obtained at a temperature of 30 °C, 9 M HCl, and 120 min of leaching time. The shrinking core model is a better representation of the kinetics than RSM with a second-order polynomial equation model. Based on SCM, the rate of the leaching reaction of titanium from low-grade ilmenite is controlled by diffusion through the ash layer.
Electrocoagulation in Wastewater from Spent-Batteries Recycling Mufakhir, Fika Rofiek; Khotimah, Chusnul; Oediyani, Soesaptri; Astuti, Widi; Sumardi, Slamet; Prasetia, Hendra; Arham, La Ode; Hakim, Hafid Zul; Petrus, Himawan Tri Bayu Murti; Poernomo, Venny
Indonesian Journal of Chemistry Vol 24, No 4 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.93262

Abstract

This study uses electrocoagulation to investigate reducing heavy metal content in wastewater from discharging spent batteries. ICP-OES analysis shows that heavy metals exceed the environmental water standard. The electrocoagulation procedure was conducted within a reactor with a 500 mL volume and a rectifier with a 5 A current capacity. Three types of electrode material combinations were used: iron (Fe) and aluminium (Al) as well as Fe-Fe, Al-Al, and Fe-Al pairs with 1 cm in the distance by parallel monopolar cells. Alternating current was used with 30, 40, and 50 A/m2 current density. The best result shown in the Fe-Al electrode pair combination system at 40 A/m2 for 30 min contact time and removal efficiencies for Co, Cd, Ni, Zn, and As is 98.76, 90.73, 99.32, 97.93, and 97.78%, respectively, while for Hg it is 31.84%, even though only Cd is above the standard limit. The heavy metal bearing was confirmed using SEM-EDS in the floc and the precipitate residue. The dissolved electrode materials and electrical energy consumed are 0.32 g and 0.109 kWh/m3, respectively. This method can be a good alternative for treating wastewater compared to direct current electrocoagulation, where the electrode and energy will be less consumed.
Kinetics and Thermodynamics Study of Ammonia Leaching on Spent LMR-NMC Battery Cathodes Perdana, Indra; Rahman, Muhammad Irfan; Aprilianto, Doni Riski; Petrus, Himawan Tri Bayu Murti; Kinanti, Divita Hayyu
Indonesian Journal of Chemistry Vol 24, No 3 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.93312

Abstract

The recycling of spent lithium NMC-type batteries, widely used in electric vehicles, presents a challenge due to manganese content, which complicates metal separation and purification. This study explored a selective leaching process using ammonia to recover metals from high-manganese-content LMR-NMC cathodes. By adjusting the (NH4)2SO4 reagent concentration to 1–2 M and maintaining the temperature between 50–80 °C, the recovery rates of lithium, nickel and cobalt metals were enhanced, leaving manganese primarily as residue in the form of Mn(OH)₂ and (NH4)2Mn(SO4)2. A kinetics model, integrating an equilibrium-shrinking core model with a modified temperature-dependent Arrhenius approach, accurately simulates the metal recovery. The activation energies of the forward leaching reactions of Li, Ni, and Co were respectively (1.4331±0.0036)×105, (1.5494±0.0034)×105, and (1.5743±0.0040)×105 J/mol, while those for the backward reactions were (5.3307±0.0041)×105, (2.4753±0.0093)×105, and (1.6289±0.0092)×105 J/mol, respectively. The leaching mechanism was found to be exothermic, which allows maximum recovery at low temperatures. The findings highlight ammonia’s effectiveness as a selective leachant, significantly reducing manganese in the leaching solution, and streamlining nickel and cobalt separation, thus enhancing the recycling process’s efficiency and sustainability.
Synthesis of Lithium-Aluminum Layered Double Hydroxide Adsorbent from Aluminum Waste to Create a More Environmentally Friendly Process for Recovering Lithium in Brine Salafudin, Salafudin; Prasetya, Agus; Warmada, I Wayan; Petrus, Himawan Tri Bayu Murti
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.97024

Abstract

All countries pledged to strive to limit global warming. The implementation of renewable energy must be accelerated. One of the most essential components of renewable energy is lithium-ion batteries. The surging demand for lithium necessitates new technologies for direct recovery from brine. One of the most promising methods is adsorption. Because of its advantages, lithium-aluminum layered double hydroxides have started their application on a commercial scale. This research uniquely explores the synthesis of lithium adsorbent from aluminum waste, an approach that is both cost-effective and environmentally sustainable. The reaction behavior was studied, including the rate of hydrogen gas production and the co-precipitation process. The quality of the product was assessed by its adsorption capacity and characterization. The synthesis of lithium adsorbent was successfully performed through two-step processes, with the reaction kinetics studied at temperatures between 30 and 60 °C. XRD and FTIR results confirmed the adsorbent product. The adsorbent worked well for synthetic brine with 39–1350 ppm lithium concentration and adsorption capacity until 6.7 mg lithium ion per g of adsorbent. These findings contribute to the development of sustainable technologies for lithium extraction and can be applied to improve industrial lithium recovery processes.
Co-Authors Achmad Roesyadi Adha Priyawan, Adha Adiatama, Aufa Rai Adythia, Dicky Marsa Agus Haerudin Agus Prasetya Agus Prasetya Ahmad Tawfiequrrahman Yuliansyah Akbar Yulandra Althea Farina Atmaja, Althea Farina Anastasia Prima Kristijarti Andi Nurfaadilah Ulfah Angelia, Annasthasya Milleni Anis Kristiani, Anis Aprilianto, Doni Riski Ardyanto Wijaya Arham, La Ode Arifudin Idrus Arini Nur Utami Asih, Yekti Aulia Pertiwi Tri Yuda Bahri, Elsha Pamida Bangun, Aya Shika Bratakusuma, Danu Bratakusuma, Danu BUDI SETIADI DARYONO Christopher Mario Hananto Chusnul Khotimah Cipta Panghegar Supriadi D Bratakusuma Dagus Resmana Djuanda Danu Bratakusuma Danu Bratakusuma Dea Anisa Ayu Besari Devi, Fatma Putrinta Dewi Purnama Sari Dewi Purnama Sari Dewi, Jilda Sofiana Dwi Umi Siswanti Dwi Wiji Lestari Edward Yonathan Natapraja Eko Agus Suyono Elsha Pamida Bahri Fahrurozi, Mohammad Fajar Nurjaman Fajar Nurjaman Fathan Bahfie Febry Yulindra Abdi Saputra Federick Dwi Putra Federick Dwi Putra Felisha Hapsari Tanujaya Felisha Hapsari Tanujaya Felix Arie Setiawan Ferian Anggara Fika Rofiek Mufakhir Fika Rofiek Mufakhir Fika Rofiek Mufakir Fika Rofiek Mufakir Fika Rofieq Mufakhir Franky Michael Hamonangan Siagian Gelar Panji Gemilar Gelar Panji Gemilar Gemilar, Gelar Panji Gyan Prameswara Hafid Zul Hakim Halomoan Siagian Harta Haryadi, Harta Hazmi, Fariz Al Heimbach, Ivano Hendrik Setiawan Hendrik Setiawan, Hendrik Himmah Sekar Eka Ayu Agustina Hotden Manurung Hotden Manurung I Gde Sukadana I Made Bendiyasa I Wayan Christ Widhi Herman Tangkas I Wayan Warmada Iga Trisnawati Iga Trisnawati Indra Perdana Indra Perdana Indra Perdana Indra Perdana Istihanah Nurul Eskani Ivanna Crecentia Narulita Simanungkalit Jayawarsa, A.A. Ketut Jonas Kristanto Joni Setiawan Kevin Cleary Wanta Kinanti, Divita Hayyu Kristanto, Jonas Kurniawansyah, Firman Laksono Trisnantoro Marizka Aviana Permatasari Mita Kusumaningrum, Mita Mufakhir, Fika Rofiek Mufakhir, Fika Rofieq Muhammad Miftahur Rahman Mustika, Pra Cipta Buana Wahyu Nadya Fardani, Nadya Nasution, Yogi Tri Putra Natalia, Priskila Patria, Aulia Agus Perbawati, Esti Kukuh Poernomo, Venny Pratiwi, Fadiah Putra, Agik Dwika Putra, Ilham Satria Raditya Radinda Bian Zaqina, Radinda Bian Rahman, Muhammad Irfan Rahman, Muhammad Miftahur Ramadhany, Putri Ratna Frida Susanti Rika Ernawati Riyadi, Delfimelinda Nurul RR. Ella Evrita Hestiandari Salafudin Salafudin, Salafudin Shinta Virdhian Shinta Virdhian shinta virdhian, shinta Siagian, Franky Michael Hamonangan Simanungkalit, Ivanna Crecentia Narulita Siti Nurul Aisyiyah Jenie, Siti Nurul Aisyiyah Slamet Sumardi Slamet Sumardi Slamet Sumardi, Slamet Soesaptri Oediyani Stephen Lim Stevanus Adi Darma Sujoto, Vincent Sutresno Hadi Supit, Jance Mudjani Suprabanindya, Caecilia Tridjata Supriadi , Cipta Panghegar Supriyatna, Yayat Iman Surianti Surianti Suryanaga, Chandra Edward Suryanaga, Edward Chandra Sutijan Sutijan Sutijan Sutijan Sutopo, Ulung Syamsumin Syamsumin, Syamsumin Takeishi, Kaoru Tampubolon, Aron Pangihutan Christian Tangkas, I Wayan Christ Widhi Herman Taufik Hery Purwanto Timotius, Daniel Trisnawati, Iga Ulfah , Andi Nurfaadilah Ulin Herlina Ulung Sutopo Utama, Andhika Putera Utomo, Dimas Bagus Galih Vincent Sutresno Hadi Sujoto Wahyu Rachmi pusparini Wahyu Yun Santoso Wibowo, Decka Pynka Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widya Rosita Wijaya, Ardyanto Wiratni Wiratni Wiratni Wiratni, Wiratni Y Iskandar Yogi Tri Putra Nasution Yuda, Aulia Pertiwi Tri Yuni Kusumastuti, Yuni Yuniati, Mutia Dewi Yusuf Iskandar