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All Journal Jurnal Rekayasa Proses Jurnal Teknologi Mineral dan Batubara Jurnal Rekayasa Proses Ophiolite : Jurnal Geologi Terapan Jurnal Rekayasa Geofisika Indonesia Jurnal Pengabdian Nusantara (JPN) Jurnal Pertambangan dan Lingkungan Jurnal Teknologi Mineral dan Batubara Jurnal Rekayasa Proses
Erwin Anshari
Halu Oleo University
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Studi pengaruh variabel proses dan kinetika ekstraksi nikel dari bijih nikel laterit menggunakan larutan asam sulfat pada tekanan atmosferik Wahab; Erwin Anshari; Marwan Zam Mili; WD. Rizky Awaliah Nafiu; Muh. Nuzul Khaq; Deniyatno; Firdaus; Yayat Iman Supriyatna
Jurnal Rekayasa Proses Vol 15 No 1 (2021): Volume 15, Number 1, 2021
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.61533

Abstract

Leaching at atmospheric pressure is one of the leaching methods of concern because it has several advantages, namely that it can process low-level nickel ore, can operate at temperatures >100 ⁰C at atmospheric pressure, and can be used in saprolite and limonite ores. In this research, nickel extraction from nickel laterite ore was carried out using sulfuric acid solution (H2SO4) as a leaching agent. The variables that were varied in the leaching process were temperature (30, 60, and 90 ⁰C), sulfuric acid concentration (0.2, 0.5, and 0.8 molar) and leaching time (30, 60, and 90 minutes). In this study, a 3-factor analysis of variance (ANOVA) was used to see the significance of the variable effects and the order of the most influential variables. In addition, leaching kinetics was studied by shrinking core models to determine rate determining step. The results showed that the increase in temperature, sulfuric acid and leaching time produced a higher percentage of extracted nickel. Based on the 3-factor ANOVA, the order of the most influential variables was obtained, namely temperature, acid concentration and leaching time. The kinetics analysis showed that rate determining step of leaching ore nickel laterite with H2SO4 solution on atmospheric pressure is controlled by diffusion through solid layer product.
Aplikasi UAV Photogrammetry Pada Produk Vulkanik Berupa Gumuk Area Zona Distal Longsoran Purba Gunung Raung Abd. Hadid Rahman Ulfa; Erwin Anshari; Tri Utomo Taliding; Moh. Suriyaidulman Rianse
Jurnal Pertambangan dan Lingkungan Vol 6, No 1 (2025): Juni 2025
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpl.v1i1.32329

Abstract

Penelitian ini bertujuan untuk menerapkan teknologi UAV (Unmanned Aerial Vehicle) photogrammetry dalam pemetaan longsoran purba gunung Raung yang berbentuk gumuk. Metode ini dirancang untuk memperoleh data yang akurat dan detail secara cepat, efisien, dan aman. UAV dilengkapi dengan kamera photogrammetry yang mampu menghasilkan citra udara resolusi tinggi. Pemrosesan citra dilakukan menggunakan perangkat lunak khusus untuk membangun model tiga dimensi pada produk longsoran gunung Raung dari area longsoran. Studi ini melibatkan survei udara dengan UAV untuk memperoleh dataset citra yang mencakup area gumuk. Hasil pemetaan mencakup visualisasi yang mendalam tentang struktur topografi dan karakteristik permukaan gumuk. Pengujian ketinggain dari data Digital Surface Model (DSM) dan Digital Terrain Model (DTM) pada gumuk menggunakan uji akurasi Root Mean Square Error (RMSE) dan Mean Absolute Error (MAE) menunjukkan ketinggian gumuk yang asli di lapangan. Pengujian dilakukan di slope yang berbeda pada area gumuk menghasilakan eror akurasi RMSE dan MAE berturut – turut 5.669 dan 4.947. Penelitian ini diharapkan dapat memberikan pemahaman yang lebih baik tentang keberadaan morfologi longsoran gunung Raung berupa gumuk di kabupaten Jember, Jawa timur. Dengan demikian, aplikasi ini dapat menjadi landasan untuk pengembangan survey awal penambangan bahan galian yang lebih efektif dan presisi pada wilayah dengan karakteristik serupa.
Co-Authors Abd. Hadid Rahman Ulfa Ali Okto Alrum Armid Dandy Ashari Daniyatno Daniyatno Deniyatno Deniyatno Deniyatno Deniyatno Deniyatno Firdaus Firdaus Firdaus Firdaus Firdaus Fitra Saleh Harisma Buburanda, Harisma Harisma Harisma Harziman Ningrat Hasria Hasria Hasria Hasria Jamhir Safani Jaya, Rio Irhan Mais Cendra Jufri Karim La Ode Nafiu Marwan Zam Mili Marwan Zam Mili Marwan Zam Mili Marwan Zamili Masri Masri Moh. Suriyaidulman Rianse Muh. Nuzul Khaq Muhammad Ichsanul Akbar Natsir Muhammad Taupan Nopri Asharun Tri Utomo Taliding Wahab Wahab Wahab Yayat Iman Supriyatna Yayat Iman Supriyatna Zeth Yoseptian Batupadang