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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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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.
Utilizing Jackfruit Leaf Ash as a Glaze in Ceramic Art Suprabanindya, Caecilia Tridjata; Petrus, Himawan Tri Bayu Murti; Hazmi, Fariz Al
ARTCHIVE: Indonesian Journal of Visual Arts and Design Vol 6, No 1 (2025): Artchive: Indonesia Journal of Visual Art and Design
Publisher : Institut Seni Indonesia Padang Panjang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53666/artchive.v6i1.4825

Abstract

The objective of this research was to apply ash glaze—specifically jackfruit leaf ash—to ceramic works in order to enhance their aesthetic value. The study involved expertise from both fine arts, particularly ceramic art, and chemical engineering, and was conducted using an inquiry-based research approach. An experimental method was employed, specifically a pre-experimental intact-group comparison design, with samples divided into four formulas containing different ash mixtures. In this study, organic ash was blended with Kebumen soil, Sukabumi soil, and ready-to-use transparent glazes (F.107 and F.3T). The results demonstrated that jackfruit leaf ash glaze produced unique textural characteristics and natural color tones (including white-gray, cream, beige, and brown), with transparent, opaque, and semi-matte glaze qualities. Furthermore, this ash glaze was applied as a decorative finish on functional ceramic craft products, either as a single formula, in combination with other jackfruit ash glaze formulas, or with the addition of oxide colorants. Adjustments were also made to the glaze composition percentages to achieve varied visual effects. The ceramics used in this study were made from Sukabumi clay, which proved to be well-suited to the jackfruit leaf ash glaze formulation.
Kinetika Proses Ekstraksi Katalis Bekas Ni/γ–Al2O3 dengan Pelarut Asam Sulfat: Model Shrinking Core dan Model Lump Bahri, Elsha Pamida; Simanungkalit, Ivanna Crecentia Narulita; Susanti, Ratna Frida; Gemilar, Gelar Panji; Astuti, Widi; Petrus, Himawan Tri Bayu Murti; Wanta, Kevin Cleary
JST (Jurnal Sains dan Teknologi) Vol. 12 No. 3 (2023): Oktober
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v12i3.46264

Abstract

Tahapan scale–up dari suatu proses kimia, kinetika atau mekanisme dari proses tersebut perlu untuk dipelajari. Hal ini dilakukan untuk meminimalkan kesalahan dalam tahap perancangan suatu alat proses. Studi kali ini bertujuan untuk mengevaluasi model matematika yang dapat menggambarkan fenomena riil dari proses ekstraksi katalis bekas Ni/γ–Al2O3 dengan menggunakan pelarut asam sulfat (H2SO4). Studi ini melibatkan dua tahapan utama, yaitu tahap pengambilan data eksperimen dan tahap simulasi model matematika terhadap data eksperimen. Data untuk studi kinetika diperoleh melalui eksperimen proses ekstraksi dalam kondisi atmosferis di mana temperatur operasi divariasikan pada 30, 60, dan 85oC. Larutan asam sulfat yang digunakan memiliki konsentrasi 1 M, sedangkan ukuran partikel katalis kurang 74 mikron. Proses ekstraksi dilakukan selama 120 menit dengan pengambilan sampel secara berkala. Kandungan nikel pada sampel tersebut dianalisis dengan menggunakan instrumen Atomic Absorption Spectroscopy (AAS).  Hasil eksperimen menunjukkan bahwa pada temperatur 85oC dan waktu ekstraksi 120 menit, nikel yang diperoleh paling banyak dibandingkan kondisi operasi lainnya, yaitu sebesar 16,95%. Studi kinetika terhadap data eksperimen tersebut menunjukkan bahwa model lump merupakan model kinetika terbaik untuk menggambarkan fenomena fisis yang terjadi selama proses ekstraksi ini berlangsung. Model lump memberikan persentase kesalahan rata–rata yang lebih kecil dibandingkan model shrinking core. Hal ini mengindikasikan bahwa tahapan difusi internal dan reaksi kimia merupakan tahapan yang mengendalikan proses ekstraksi ini.
Efek Pre-Roasting Terhadap Parameter Kinetika Leaching Cr dari Limonit Prameswara, Gyan; Ulfah , Andi Nurfaadilah; Supriadi , Cipta Panghegar; Trisnawati, Iga; Petrus, Himawan Tri Bayu Murti
REACTOR: Journal of Research on Chemistry and Engineering Vol. 4 No. 2 (2023)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v4i2.97

Abstract

Hydrometallurgical processes such as leaching of limonite ore to extract valuable metals including Ni and Co are often non-selective, including other metals in the leachate product. The leaching behavior of Cr from the chromite mineral contained in limonite ore is of concern due to the high Cr content of the leachate effluent. The pre-roasted process is frequently used to pre-treat limonite to increase the precious metal content. This study aims to determine the leaching behavior of Cr and the effect of pre-roasting on its kinetic parameters. The pre-roasting process was carried out at 280 and 610 oC for 4 hours. Observation of Cr leaching behavior was carried out in the leaching temperature range of 30-90 oC for 0-120 minutes using sulfuric acid solvent. The highest Cr recovery was achieved in pre-roasted ore leaching at 610 oC with leaching operating conditions of 2 M sulfuric acid, solid-liquid ratio of 5 g/50 mL, 200 rpm, for 120 minutes, at a leaching temperature of 90 oC, under these conditions Cr recovery reached 53.16%. The higher the roasting temperature, the lower the activation energy required for the leaching process. Cr leaching from raw and pre-roasted ore is controlled by the diffusion process through the ash layer with activation energies (EA) of 21.41, 18.64, and 14.71 kJ/mol for raw ore, pre-roasted ore 280 oC, and pre roasted ore 610 oC, respectively. The comparison of kinetics data from several roasting products for atmospheric leaching feeds will provide industry with information to integrated pyro-hydrometallurgical process to increase Cr production from laterite.
Preliminary study of production electrolytic silicon from silica amorphous in alkaline media Rahman, Muhammad Miftahur; Siagian, Franky Michael Hamonangan; Nasution, Yogi Tri Putra; Astuti, Widi; Sutopo, Ulung; Petrus, Himawan Tri Bayu Murti
CHEMICA: Jurnal Teknik Kimia Vol. 10 No. 2 (2023): August 2023 [Available online since October 02, 2023]
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v10i2.26735

Abstract

This study used direct electrowinning to examine the viability of producing silicon from amorphous silica in alkaline conditions. The Indonesian Dieng Geothermal Power Plant provided a sample of geothermal sludge with a high silica (SiO2) content. The samples were analyzed using various analytical techniques (XRF and XRD) before to electrolysis to ascertain their chemical composition and mineralogy. At low temperatures (30°C), the direct electrowinning method using amorphous silica suspended in sodium hydroxide (NaOH) was introduced. Current density adjustments were made to determine the direct electrowinning method's ideal operation. XRD and XRF analyses were performed on cathode deposits and residues in electrochemical cells to ascertain the chemical composition and current recovery. At a current density of 1250 A/m2, the low-temperature electrolysis current efficiency on natrium silicate solution can approach 34% recovery. Geothermal sludge was used to investigate the process, and the process's mediocre performance was caused by the problematic adsorption of amorphous silica particles on the cathode.
Studi Recovery Tembaga pada Proses Froth Flotation dari Bijih Tembaga Papua, Indonesia dengan Variasi pH dan Konsentrasi Kolektor Heimbach, Ivano; Petrus, Himawan Tri Bayu Murti; Prasetya, Agus; Idrus, Arifudin; Timotius, Daniel; Kusumastuti, Yuni; Sutijan, Sutijan
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In the process of flotation of copper-bearing ore, several factors such as the concentration of the collector used and the pH of the fluid used can have an impact. In this study, observations were made on the influence of collector concentration and pH on the recovery of copper ores from Papua, Indonesia. The ore samples were obtained from three different site. Preparation of samples were conducted by crushing and sieving to obtain solid particles with a size of +200 mesh. The fine particles then fed into froth flotation device. Froth flotation operations were carried out at different operating condition namely pH (pH 3, pH 6, and pH 9), xanthate concentration (1300, 2000, and 2600 ppm), and time (3, 5, 7, and 14 minutes). The froth and tailings were collected separately and dried in an oven at 60oC. The feed, froth, and tailings were then subjected to EDX analysis to determine their compositions. The results of the experiment showed that higher collector concentrations did not necessarily lead to increased copper recovery. The appropriate pH conditions, however, could optimize copper recovery. The optimum conditions obtained from this experiment were xanthate concentration of 2000 ppm, pH of 3, and the ore sample 2
Sintesis Copper-Nanoparticles dari Limbah Leaching Kalkopirit Sebagai Zat Antibakteri dengan Metode Reduksi Wibowo, Decka Pynka; Kusumastuti, Yuni; Prasetya, Agus; Asih, Yekti; Petrus, Himawan T.B.M; Idrus, Arifudin
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Nanoparticle technology has been widely used in various industries because of its advantages in particle size control systems. One example of the use of nanoparticle technology is copper nanoparticles as an antibacterial material. This research focuses on the utilization of leaching waste as a material for the synthesis of copper nanoparticles. The synthesis of copper nanoparticles was carried out by chemical reduction method between chalcopyrite stone leaching waste namely CuSO4 as precursor, Cetyl Trimethyl Ammonium Bromide (CTAB) as surfactant and NaBH4 reducing agent. The synthesized material will be analyzed using UV-Vis spectroscopy. Furthermore, the particle size will be estimated using PSA and its antibacterial properties will be analyzed using the well diffusion method by looking at the effectiveness of the inhibitory power against Escherichia coli FNCC 0049 and Staphylococcus bacteria aureus FNCC 0047. The results of the synthesis obtained the smallest size of 235.7 nm from the ratio of precursor concentration, reducing agent concentration and, a surfactant concentration of 1:20:8. The results of the synthesis of copper nanoparticles with concentrations of 10.000 ppm showed the presence of inhibitory power to overcome Escherichia coli FNCC 0049 and Staphylococcus bacteria aureus FNCC 0047.
Preliminary Study of WebGIS Implementation on Monitoring and Evaluation of the Regional Action Plan for Reduction and Elimination of Mercury Use (RAD-PPM) Perbawati, Esti Kukuh; Purwanto, Taufik Hery; Petrus, Himawan Tri Bayu Murti; Santoso, Wahyu Yun
Proceeding ISETH (International Summit on Science, Technology, and Humanity) 2021: Proceeding ISETH (International Summit on Science, Technology, and Humanity)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1978.211 KB) | DOI: 10.23917/iseth.1205

Abstract

Presidential Regulation Number 21 of 2019 concerning the National Action Plan for Mercury Reduction and Elimination (RAN-PPM) became the strategy for reduction and elimination of Mercury, then later revealed in the Regional Action Plan for Mercury Reduction and Elimination (RAD-PPM). According to it, a comprehensive monitoring method is urgently needed, neither only related to the elimination of mercury in the ASGM sector, but also for regional development potential. This research is a Research and Development research, which is a type of research that aims to develop applications, which are used as a tool for decision making-a Decision Support System (DSS). Using a descriptive qualitative method, to analyse related documents, interviews with related actors, and calculate System Usability Scale to analyse and see the usability and the level of user acceptance to the WebGIS. The case study is the development and preparation of a WebGIS related to the ASGM sector in Kokap, Kulon Progo. The result of the study shows that an information system with geospatial-based analysis could facilitate data integration, implementation and monitoring of the regulation of mercury elimination, especially in the ASGM sector. As a result of the WebGIS System Usability Scale for Small-Scale Gold Mining in Kulon Progo Regency, it is included in the category of applications that can be accepted by users and is quite appropriate. Nevertheless, synergy and cooperation between various agencies are necessary. Moreover, the data related to socio-economic which is an important information system for regional development can also be mapped in a GIS.
Nickel and Scandium-Bearing Minerals Associated with Limonitic Laterite Zone of the Lameruru Deposit in Southeast Sulawesi, Indonesia Supit, Jance Mudjani; Idrus, Arifudin; Petrus, Himawan Tri Bayu Murti; Sukadana, I Gde; Pratiwi, Fadiah
Indonesian Journal on Geoscience Vol. 12 No. 2 (2025)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.12.2.175-197

Abstract

This study investigates nickel and scandium enrichment within a laterite profile developed on ultramafic rocks in the Lameruru area, Southeast Sulawesi. Utilizing mineralogical and geochemical analyses, the research examines transformations from parent rock through four laterite horizons: rocky saprolite, earthy saprolite, yellow limonite, and red limonite. Results reveal distinct enrichment patterns for Ni and Sc. Nickel is concentrated in the saprolite, hosted by minerals such as willemseite, vermiculite, lizardite, and antigorite, and decreases towards the red limonite, suggesting an initial enrichment during weathering followed by remobilization. Conversely, Sc increases throughout the profile, peaking in the red limonite and dominantly associated with goethite. Nickel is structurally bound within mineral lattices, while scandium is adsorbed onto mineral surfaces, particularly goethite in the red limonite. This contrasting behaviour highlights different geochemical controls influencing Ni and Sc enrichment during lateritization. Further research should explore these mechanisms to optimize recovery strategies.
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