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All Journal PENA SAINS Journal Of Chemical Process Engineering (JCPE) Darmabakti : Junal Pengabdian dan Pemberdayaan Masyarakat Dewantara Journal of Technology Journal of Natural Science and Technology Adpertisi: Bidang Sains dan Teknologi Satera: Jurnal Sains dan Teknik Terapan Journal Of Chemical Process Engineering Journal of Green Chemical and Environmental Engineering International Journal of Educational Development and Innovation
Ardiansah, Ardiansah
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Other

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Nickel Extraction from Laterite Ore via Sulfuric Acid Leaching and Iron Precipitation Using NaOH with Gravimetric Analysis Ardiansah, Ardiansah; Albar J, Muh. Azis; Aldi, Aldi
Jurnal Sains dan Teknik Terapan Vol. 3 No. 2 (2025): Jurnal Sains dan Teknik Terapan
Publisher : Unit Penelitian dan Pengabdian Kepada Masyarakat, AK-Manufaktur Bantaeng

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Abstract

The global demand for nickel has continued to rise, in line with the growth of the stainless steel industry and renewable energy technologies. Indonesia, as one of the countries with the largest reserves of laterite nickel ore in the world, faces challenges in processing limonite ore, which typically contains high levels of iron and lower concentrations of nickel. This study aims to improve the efficiency of nickel extraction through a hydrometallurgical approach, using sulfuric acid (H₂SO₄) leaching, selective iron precipitation with sodium hydroxide (NaOH), and nickel determination using the gravimetric method. The leaching process was conducted at 90°C, varying the leaching time and acid concentration, followed by iron precipitation through pH adjustment and the addition of hydrogen peroxide to oxidize Fe²⁺ to Fe³⁺, which subsequently forms Fe(OH)₃. The resulting iron-free filtrate was then reacted with dimethylglyoxime (DMG) to form a pink precipitate of the nickel complex [Ni(DMG)₂], which was then analyzed gravimetrically. The results showed that increasing leaching time and solvent concentration significantly enhanced the nickel extraction percentage. This approach proved to be effective in improving the selectivity and efficiency of nickel separation from impurities, thereby supporting a cleaner and more sustainable nickel production process.
Pelatihan Penyusunan Bahan Pembelajaran Berbasis Digital di SMA Negeri 1 Bahodopi Afandy, Moh. Azhar; Sawali, Fikrah Dian Indrawati; Albar. J, Muh. Azis; Ardiansah, Ardiansah; Putra, Aditya Perdana; Saputra, Aditya Tri; Rahman, Arif
Darmabakti : Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 6 No 02 (2025): Darmabakti : Junal Pengabdian dan Pemberdayaan Masyarakat
Publisher : Lembaga Peneliian dan Pengabdian Masyarakat (LPPM) Universitas Islam Madura (UIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31102/darmabakti.2025.6.02.420-426

Abstract

Peningkatan aktivitas mengajar secara daring terlebih saat masa darurat penyebaran virus COVID – 19 melanda, membuat tenaga pendidik utamanya seorang guru sangat terbantu apabila memiliki kecakapan dalam penggunaan teknologi, untuk menjangkau para murid yang melaksanakan pembelajaran dari rumah. Oleh karena itu, perlu diadakannya peningkatan komptenesi guru dalam bidang digital education sesuai dengan era saat ini. Berdasarkan kendala yang dimiliki mitra yaitu kurangnya keterampilan SDM (guru) dalam mengolah media pembelajaran berbasis digital untuk meningkatkan minat belajar siswa, agar siswa dapat memahami pembelajaran meskipun menggunakan sistem belajar online utamanya di SMA Negeri 1 Bahodopi. Sesuai pelaksanaannya, Kegiatan peningkatan kompetensi guru di SMA Negeri 1 Bahadopi telah terlaksana dengan baik, namun ada beberapa kendala yang diharapi selama kegiatan ini berlangsung yaitu ketidaksesuaian waktu pelaksanaan, materi yang diberikan belum terperinci, serta keterbatasan perangkat pendukung pembuatan video. Sehingga, para peserta yang terdiri dari guru sekolah dan tim pelaksana menggunakan berbagai peralatan yang ada. Demi mendukung kegiatan tersebut berlangsung dengan baik.
A Study on The Effectiveness of Bentonite Adsorbent in Reducing Pb Metal Levels in Used Lubricating Oil Satoding, Gain Allegra; Ardiansah, Ardiansah; Albar J, Muh. Azis; Sumbung, Jony
Jurnal Sains dan Teknik Terapan Vol. 2 No. 1 (2024): Jurnal Sains dan Teknik Terapan
Publisher : Unit Penelitian dan Pengabdian Kepada Masyarakat, AK-Manufaktur Bantaeng

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Abstract

Used lubricating oil contains contaminants that can pollute the environment if not managed properly. One of the contaminants contained in it is heavy metals. Adsorption using adsorbent materials such as bentonite has become one of the commonly used methods for removing contaminants in used lubricating oil. Bentonite is a clay that is good for use as an adsorbent for heavy metals because it has large enough particles that are good for absorbing them. However, the effectiveness of bentonite adsorption can be influenced by the mass of bentonite used in the process. This research aims to determine the effectiveness of the influence of bentonite mass on reducing Pb metal in lubricating oil using HCl-activated bentonite. The research results show that increasing the mass addition of bentonite can increase the effectiveness of adsorption and the removal efficiency of Pb metal in used lubricating oil. This is characterized by a decrease in Pb metal content in used lubricating oil before and after the adsorption process, namely in sample A with the addition of 2 grams. The Pb metal content in used lubricating oil is 0.2471 ppm, 4 grams is 0.2000 ppm, 6 grams is 0.142 ppm, at 8 it was 0.0895 ppm, and at 10 grams it was 0.0316 ppm. In sample B, with the addition of 2 grams, the metal content of Pb in the used lubricating oil was 0.3000 ppm, 4 grams was 0.2474 ppm, 6 grams was 0.2053 ppm, 8 grams was 0.1474 ppm, and 10 grams was 0.0684 ppm.
The Effect of Students Helping Students (SHS) Techniques in Improving Reading Comprehension in the New Normal Era Muhammad Rafiq; Ardiansah Ardiansah
International Journal of Educational Development and Innovation Volume 1 Number 1 August 2021
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/ijedi.v1i1.23576

Abstract

This study aims to determine the effect of the Students Helping Students (SHS) technique in improving students' reading comprehension of English texts in the New Normal Era. This research is a classroom action research in class VIIIA SMPN 3 Pitumpanua Wajo district. The data in this study are class observations, test results, and the results of distributing questionnaires. Class observations were carried out during the implementation of the action, while the tests were the results of the pre-test before the action and the results of the post-test after the action, while the distribution of the questionnaire was to see the students' attitudes towards the application of the SHS technique in learning to read. There are two ways in implementing learning in the new normal era, namely online classes and offline classes by complying with health protocols. During the implementation of the action of implementing SHS in learning, it showed an effect on increasing learning outcomes, increasing student motivation, good group cooperation, increasing vocabulary and increasing students' abilities and courage in expressing opinions. The test results showed that the post-test results were higher than the pre-test results, indicating that there was a significant increase. With the application of this SHS technique, students show their positive attitude which is indicated by responses through a questionnaire. It can be assumed that the application of the SHS technique in learning reading comprehension in junior high school is very effective and has an influence on improving student learning outcomes.
Analisa Pengaruh Ukuran Partikel Ore terhadap Persen Recovery Nikel Laterit dengan Pelarut Asam Sitrat Muh Azis Albar J; Irhamni Nuhardin; Ardiansah Ardiansah
Dewantara Journal of Technology Vol. 4 No. 1 (2023)
Publisher : Akademi Teknologi Industri Dewantara Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59563/djtech.v4i1.227

Abstract

Nikel merupakan hasil tambang yang digunakan dalam berbagai industri kimia. Salah satu mineral logam yang memiliki manfaat dan nilai jual yang tinggi adalah nikel. Pada umumnya nikel terbagi menjadi dua jenis yaitu nikel sulfida dan nikel laterit. Pemanfaatan nikel laterit sebagai bahan baku produksi nikel harus dilakukan. Salah satu cara memanfaatkan nikel yang terdapat di wilayah Indonesia agar mempunyai nilai ekonomis yang tinggi maka dilakukan pengolahan mineral dengan proses leaching. Proses leaching dilakukan menggunakan pelarut asam sitrat. Penggunaan asam sitrat pada peneletian ini karena dinilai lebih ramah lingkungan dan kurangnya penggunaan asam sitrat sebagai pelarut pada proses leaching. Terdapat beberapa konsentrasi asam sitrat yang digunakan, yaitu 0,5 M, 1 M, dan 2 M dengan perbandingan 1:5, adapun ukuran partikel yang digunakan yaitu 100 mesh, 150 mesh, dan 200 mesh dengan suhu 80℃ selama 1 jam. Kadar nikel dalam ore sebelum diberi perlakuan sebesar 1,67%. Tujuan dari penelitian ini yaitu untuk mengetahui ukuran partikel sampel ore terhadap persen recovery nikel laterit pada proses leaching. Hasil penelitian ini menunjukkan bahwa pada ukuran partikel 200 mesh yaitu didapatkan persen recovery nikel sebesar 78.29% dan persen recovery nikel ukuran partikel 100 mesh yaitu sebesar 74.45%.
Pengaruh Konsentrasi Asam Sitrat terhadap Persen Recovery Nikel pada Proses Leaching Bijih Nikel Laterit Muh. Azis Albar J; Nurul Afifah Utami; Irhamni Nuhardin; Ardiansah
Dewantara Journal of Technology Vol. 6 No. 1 (2025)
Publisher : Akademi Teknologi Industri Dewantara Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59563/djtech.v6i1.304

Abstract

Penelitian ini mengevaluasi pengaruh konsentrasi asam sitrat terhadap persen recovery nikel pada proses leaching bijih nikel laterit (limonit) dengan kondisi operasi tetap. Variasi konsentrasi asam sitrat yang diuji adalah 0,5 M; 1,0 M; dan 2,0 M, sedangkan parameter operasi dijaga konstan pada suhu 80 °C, waktu leaching 60 menit, dan rasio padat-cair 1:5. Preparasi bijih dilakukan melalui pengeringan, penghancuran, dan pengayakan pada ukuran 100, 150, dan 200 mesh. Kandungan nikel awal bijih dianalisis dengan XRF sebesar 1,67%. Persen recovery dihitung berdasarkan neraca massa-konsentrasi antara umpan dan residu. Hasil menunjukkan bahwa peningkatan konsentrasi asam sitrat meningkatkan persen recovery pada seluruh ukuran partikel. Rentang persen recovery yang diperoleh adalah 74,45–78,29%, dengan nilai tertinggi pada konsentrasi 2,0 M dan ukuran partikel 200 mesh (78,29%), serta nilai terendah pada konsentrasi 0,5 M dan ukuran 100 mesh (74,45%).
Method Verification of Carbon and Sulfur Determination in Ferronickel Tapping Samples Using HCS-801 in Accordance with GB/T 20123 Muh. Azis Albar. J; Muhammad Mattana Anwar; Ardiansah Ardiansah; Mahardika Sandy Ponco; Alexander Malau
Journal of Green Chemical and Environmental Engineering Vol. 2 No. 1 (2026): Journal of Green Chemical and Environmental Engineering
Publisher : Candela Edutech Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63288/jgcee.v2i1.24

Abstract

Reliable determination of carbon (C) and sulfur (S) in tapping ferronickel is critical for metallurgical quality control and compliance with industrial specifications. Given the complex metallic matrix of ferronickel, verification of analytical performance is essential before routine application. This study verifies the GB/T 20123 standard method for the simultaneous determination of carbon and sulfur in tapping ferronickel using a High Carbon Sulfur (HCS-801) combustion–infrared analyzer. Method performance was assessed using accuracy, precision (repeatability), linearity, limit of detection (LOD), and limit of quantification (LOQ), in accordance with internationally accepted validation principles. Evaluation of recovery testing yielded 97.82 % for carbon and 99.04 % for sulfur, both within acceptable recovery ranges. Precision expressed as %RSD was 1.27% for carbon and 0.70% for sulfur, complying with the Horwitz criterion (% RSD < ½ CV Horwitz) and the general acceptance limit of 2 %. Excellent linearity was obtained across the calibration range, with correlation coefficients (r) of 0.998 for carbon and 0.9984 for sulfur. LOD and LOQ values, calculated based on the standard deviation of response and slope of calibration curves, were 0.0557% and 0.1855% for carbon, and 0.0123 % and 0.0409 % for sulfur, respectively. The results demonstrate that the GB/T 20123 method, when implemented with the HCS-801 analyzer, provides reliable analytical performance for carbon and sulfur determination in tapped ferronickel and is suitable for routine industrial applications.
Co-Authors Ahmad Hendrawan Aldi, Aldi Alexander Malau Alexander Malau Andi Suryanto Aqdar Fitrah, Muhammad Arif Rahman Arminas, Arminas Asrina Asrina Bagio Kadaryanto, Bagio Cherly Firdharini Diana Eka Pratiwi Fikrah Dian Indrawati Sawali Firdharini, Cherly Gunawan, Fendri Gusnawati Hermin Hardyanti Utami Imam Setiawan Irhamni Nuhardin Lilih, Hendi Lutfi, Shokhul Mahardika Sandy Ponco Mega Fia Lestari Moh. Azhar Afandy Muh. Azis Albar. J Muhammad Mattana Anwar Muhammad Rafiq Munira Munira Nuhardin, Irhamni Nurfadilah Nurfadilah Nurul Afifah Utami Putra, Aditya Perdana Rahman Hakim Ria Rahmi Saputra, Aditya Tri Satoding, Gain Allegra Shokhul Lutfi Sumbung, Jony Tasya Towolioe, Sherly Utami, Hermin Hardyanti Yusriadi Yusriadi Zakir Sabara HW