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Irfan Marwanza
Universitas Trisakti
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PYROMETALLURGICAL PROCESS FOR ZINC ANALYSIS IN SPHALERITE APPLYING XRD AND XRF Dahani, Wiwik; Kurniawati, Riskaviana; Sundari, Rita; Marwanza, Irfan; Rachman, Faisal
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1525

Abstract

This paper has analyzed dominant zinc element in sphalerite naturally found together with galena in mineral ore. Since pyrometallurgical route related to roasting process is very common to mineral dressing, therefore, this investigation has studied the effect of varied roasting time (30 min, 60 min, and 90 min) and temperature (500oC, 600oC, and 700oC) on zinc mineral examination using XRD (X-Ray Diffraction) and zinc element using XRF (X-Ray Fluorescence) analyses. Previous studies usually applied cheaper AAS (Atomic Absorption Spectrometer) for zinc analysis in aqueous solution, however, sphalerite is a solid matrix and therefore, this study has applied XRF to analyze zinc. Pyrometallurgical process of zinc mineral in sphalerite is related to mineral transformation in the form of ZnSO4, ZnS, and ZnO that cannot be detected by XRF. Therefore, this study has used XRD that can observe mineral transformation.   The XRD pattern shows four intense peaks at 2θ (28o, 47o, 56o, and 76o) justified sphalerite (ZnS) sample with little amount of pyrite (FeS2) and galena (PbS) as impurities. The XRF analysis shows from 30 min to 90 min, the Zn content has increased remarkably at 700oC and Zn content looked stagnant at 500oC, while Zn content increased dramatically from 60 min to 90 min at 600oC. During roasting process at high temperature, ZnS mineral converted to ZnO and expelled SO2 gas due to oxidation reaction causing weight reduction. The study is valuable for mineral processing in searching for optimization.
PELATIHAN PENGUKURAN KUALITAS AIR SUNGAI DESA CISARUAKECAMATAN NANGGUNG Reza Aryanto; Wiwik Dahani; Irfan Marwanza; Andry Prima
Jurnal Pengabdian Masyarakat Indonesia (JPMI) Vol. 1 No. 6 (2024): Agustus
Publisher : Publikasi Inspirasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62017/jpmi.v1i6.2121

Abstract

Kabupaten Bogor, yang terletak diwilayah Jawa Barat memiliki potensi sumber daya alam yang menjanjikan dalam bidang pertambangan emas khususnya pada desa Cisarua. Namun, kegiatan pertambangan emas didaerah ini adalah illegal dan memiliki resiko tinggi terhadap lingkungan dan pekerja. Proses penambangan dilakukan dengan teknik sederhana dan pengolahan emas menggunakan merkuri yang berpotensi mencemari lingkungan. Penambangan tanpa izin ini sering menggunakan merkuri dan membuang air hasil pengolahan ke sungai desa Cisarua. Melalui kegiatan pengabdian kepada masyarakat ini, tim terdiri dari dosen dan mahasiswa mengadakan kegiatan penataran, penyuluhan, pelatihan terkait pengukuran dan pengelolaan kualitas air di sungai desa Cisarua. Hasil dari pelatihan dan pengukuran kualitas air sungai desa Cisarua diharapkan masyarakat dapat melakukan pemantauan kualitas air sesuai baku mutu air secara mandiri.
PENYULUHAN DAN PENANAMAN BIBIT-BIBIT DURIAN PADA LAHAN KRITIS DI DESA CURUG, KOTA BOGOR Fathaddin, Muhammad Taufiq; Safitri, Diah Utami; Prapansya, Onnie Ridaliani; Marwanza, Irfan; Nuryana, Suherman Dwi; Pramadika, Havidh; Maulida, Fajri; Arkaan, Muhammad Dzaki
Jurnal AKAL: Abdimas dan Kearifan Lokal Vol. 5 No. 2 (2024): Jurnal AKAL : Abdimas dan Kearifan Lokal
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/akal.v5i2.19941

Abstract

The region in Indonesia is indicated to have many critical lands. Critical lands are lands that have experienced degradation so that the land cannot function properly. In other words, efforts to obtain benefits from the level of productivity that should not be comparable to the results of production. Therefore, efforts must be made to improve the land so that its productivity can recover. In the Curug sub-district, Bogor City, there are critical lands. This critical land is caused by steep land topology and high rainfall. One of the critical land areas is the Curug River watershed. The slope of the land on the side of the river exceeds a slope of 45º. High rainfall causes the land to experience cracks accompanied by subsidence of the land surface. One of the handling efforts that can be carried out on an ongoing basis is integrated reforestation. Based on these problems, the aim of this community service (PKM) is to provide education regarding the dangers of critical land and cultivating critical land with durian seeds. This activity was carried out by a team consisting of source persons, lecturers and students from the Faculty of Earth and Energy Technology, Trisakti University. The PKM activity was attended by the Head of RW 13 and the Head of RT 3 in Curug Village and their staff. Apart from that, the PKM was attended by the men and women of RT 3 residents who actively participated in counseling activities and planting durian seeds along the areas along the river and other areas.
Optimization of Titanium Recovery from Tin Tailings Using Flotation Route Subandrio Subandrio; Wiwik Dahani; Rita Sundari; Riskaviana Kurniawati; Irfan Marwanza; Franko Sajow Darren
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 6, No 3 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v6i3.28891

Abstract

Titanium has found widespread application across various industries due to its high corrosion resistance. It is commonly used in dental equipment, surgical instruments, bone implants, and marine components, and serves as an engine material in high-temperature environments. Because of its lighter weight compared to steel, titanium has also replaced stainless steel in many construction materials. In Bangka Island, Indonesia, tin tailings have been identified as a potential source of titanium, making the analysis of titanium in these tailings highly significant. This study employed the froth flotation method, known for its simplicity, speed, and cost-effectiveness, to analyze titanium content from tin tailings. Sodium oleate was used as the frother and collector, while sodium chlorate acted as the depressant. The mass ratios of depressant to collector were varied at fixed collector amounts (1:10, 5:10, 10:10, and 15:10) and fixed depressant amounts (10:3, 10:6, 10:9, and 10:12). The highest titanium concentration (2.03%) was achieved with a mass ratio of 10:12, while the optimal titanium recovery (45.51%) in the concentrate occurred with equal amounts (3.75 g) of depressant and collector, or at a mass ratio of 10:10, at 15 minutes of flotation time and neutral pH. X-ray fluorescence (XRF) and X-ray diffraction (XRD) analyses indicated that the tin tailings primarily contained silicate and zircon minerals, with traces of titanium in the form of rutile, ilmenite, and titanate. These findings contribute valuable insights for future titanium extraction and processing industries.
PENDAMPINGAN TEKNIS MASYARAKAT DESA SIRNAJAYA DALAM MENGHADAPI RISIKO BENCANA TANAH LONGSOR Iit Adhitia; Wahyu Gendam Prakoso; Irfan Marwanza; Muhammad Agus Karmadi; Singgih Irianto Trisilo Hadi; Solihin
Jurnal Abdi Masyarakat Indonesia (JAMIN) Vol 5 No 1 (2023): JURNAL ABDI MASYARAKAT INDONESIA (JAMIN)
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jamin.v5i1.16047

Abstract

The hilly area around Situ Rawa Gede is located in Sirnajaya Village, Sukamakmur District, Bogor Regency, with the existence of Situ Rawa Gede surrounded by hills extending from the south to the northwest. Landform changes are increasingly visible in the hilly areas around Situ Rawa Gede due to community gardening activities and coffee agro-tourism, and the opening of settlements causes topsoil to peel off, which is detrimental to the physical condition of the soil, can cause erosion and trigger mass movement of soil/rock. It is necessary to arrange land in the hilly area around Situ Rawa Gede to be appropriately organized. A zoning map of the vulnerability of ground motion is needed; from this map, it can be seen which areas have low to high soil vulnerability. Land management is one of them by making terracing which helps increase water infiltration into the soil and limiting surface runoff to minimize the risk of surface water erosion. This PkM activity provides a technical description of the concept of making a soil movement vulnerability zoning map to the community so that they understand the importance of maps of low to high soil vulnerability zones in their area in disaster mitigation efforts and through technical assistance related to the application of bench terraces and garden terraces so that they can be planted with plantation crops as ground cover is also for the safety of the community and visitors to coffee agro-tourism.
Geostatistical Modeling using Ordinary Kriging for Estimating Nickel Resources in Sulawesi Indonesia Marwanza, Irfan; Putra, Danu; Azizi, Masagus Ahmad; Dahani, Wiwik; Gumay, Rhazes Eesha; Sahetapy, Silvia Immanuela
Journal of Multidisciplinary Applied Natural Science Vol. 5 No. 2 (2025): Journal of Multidisciplinary Applied Natural Science
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.252

Abstract

Geostatistic is a statistical tool used in the mining sector to estimate and classify mining resources at a specific location. The purpose of this study was to evaluate the distribution or model of nickel resources, as well as estimate and classify nickel resources using a geostatistical approach. This study used data from exploration drilling at one of the nickel mining concessions in Sulawesi, Indonesia. The data set included 464 drill holes with an average distance of 50–100 m. The initial stage in this study was to develop a geological model, followed by descriptive statistical analysis, with the results of the variance coefficient ranging from 0.5 to 1.5 and normal distribution, indicating that the ordinary kriging method can be used and is considered adequate to produce sound and consistent findings. The values obtained from the variogram analysis on the spherical model will be used as parameters in the ordinary and efficiency kriging processes. Based on the estimation and classification of nickel resources using ordinary and efficiency kriging, the total measured, indicated, and inferred nickel resources are 39, 1.25, and 3 million tons, respectively, with an average Ni content of 1.16%.
Evaluasi Jumlah Kebutuhan Alat Gali Muat dan Alat Angkut Untuk Mencapai Target Produksi Overburden di PT Nuansacipta Coal Investment Palaran, Kalimantan Timur Alvando Alone, Marcel Samuel; Korra Herdyanti, Mixsindo; Marwanza, Irfan; Putra, Danu; Subandrio
Indonesian Mining and Energy Journal Vol. 6 No. 2 (2023): November
Publisher : Program Studi Teknik Pertambangan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/imej.v6i2.19267

Abstract

Ketercapaian produksi merupakan salah satu indikator keberhasilan kegiatan operasional penambangan. Pemenuhan indikator ini umumnya disebabkan faktor-faktor operasional peralatan tambang, khususnya pada alat gali dan alat muat. Salah satu faktor ini adalah kesediaan alat tambang, yang didalamnya terdiri dari ketersediaan fisik (PA), ketersediaan mekanis (MA), dan efektif pemakaian (EU). Rendahnya nilai parameter umumnya berdampak pada ketidaktercapaian target produksi. Pada penelitian ini menggunakan metode evaluasi kuantitatif, dimana dilakukan evaluasi pada jumlah kebutuhan alat yang digunakan untuk mencapai target produksi overburden, data yang dibutuhkan pada penelitian, waktu siklus dari alat muat dan angkut. Dilakukan simulasi pada waktu standby alat untuk mengoptimalisasikan hasil produksi dari alat yang digunakan. Perhitungan terhadap produktivitas dan produksi tercapai dilakukan pada skenario sebelum dan setelah peningkatan kinerja. Sebagai indikator keberhasilan, faktor keserasian (MF) juga dihitung pada kedua skenario. Pada akhir studi, dilakukan perhitungan kebutuhan peralatan untuk melihat pengaruh peningkatan kinerja pada kebutuhan peralatan tambang. Setelah dilakukan pengolahan data yang didapat dapat kesimpulan bahwa optimalisasi waktu standby alat tidak cukup untuk mencapai target produksi overburden, dan dibutuhkan satu unit tambahan pada alat angkut.
Studi Penggunaan Kapur Tohor dan Tawas Untuk Pengolahan Air Asam Tambang di Settling Pond 8 PT Internasional Prima Coal Susanti, Chiesa Artamevia Diva; Tuheteru, Edy Jamal; Suliestyah; marwanza, irfan
Indonesian Mining and Energy Journal Vol. 7 No. 2 (2024): November
Publisher : Program Studi Teknik Pertambangan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/imej.v7i2.20780

Abstract

Permasalahan yang ada pada kegiatan tambang terbuka (open pit mine) salah satunya yaitu air asam tambang (AAT). AAT berasal dari batuan yang mengandung mineral sulfida dan terpapar kondisi atmosfer, yang mengakibatkan pembentukan asam yang mengandung tingkat sulfat yang tinggi sehingga air mempuyai nilai pH, mengandung zat tersuspensi (total suspended solid), besi serta mangan dengan konsentrasi yang tinggi. Kondisi settling pond 8 saat ini memiliki kualitas air dengan pH 3,93 ; TSS 385 mg/l ; Fe 0,03 mg/l ; Mn 5 mg/l. Dari hasil penelitian berdasarkan sampel dari settling pond 8 dibutuhkan kapur tohor untuk penetralan AAT sebanyak 2.820 kg/bulan kapur tohor yang diharapkan dapat meningkatkan pH dari 3,93 menjadi pH 7,57, untuk tawas dibutuhkan 4.230 kg/bulan tawas yang diharapkan dapat menurunkan TSS dari 385 menjadi 175 serta pemberian kapur tohor dan tawas dengan variasi jeda waktu dua hari sekali dapat memelihara kualitas air dan menjaga stabilitas pH dengan baik.
PENGARUH VARIASI KEMIRINGAN TERHADAP TOTAL SUSPENDED SOLID (TSS) MENGGUNAKAN RAINFALL EROSION SIMULATOR  Pandiangan, Violeta Apriani; Aryanto, Reza; Purwiyono, Taat Tri; Yulianti, Ririn; marwanza, Irfan
Indonesian Mining and Energy Journal Vol. 8 No. 1 (2025): Mei
Publisher : Program Studi Teknik Pertambangan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh variasi kemiringan lereng terhadap konsentrasi Total Suspended Solid (TSS) yang dihasilkan dalam proses erosi menggunakan rainfall erosion simulator. Erosi tanah, yang sering terjadi di daerah dengan kemiringan curam, dapat menyebabkan kerusakan lingkungan dan menurunkan kualitas air. Dalam penelitian ini, eksperimen dilakukan dengan variasi kemiringan 10% dan 20%, serta panjang board 50 cm, 100 cm, dan 150 cm. Hasil penelitian menunjukkan bahwa kemiringan lereng yang lebih landai (10%) cenderung menghasilkan konsentrasi TSS yang lebih tinggi, dengan peningkatan TSS yang konsisten seiring panjang board. Sebaliknya, pada kemiringan 20%, terjadi penurunan TSS setelah awal percobaan, meskipun nilai TSS pada awalnya lebih tinggi. Hal ini mengindikasikan bahwa tanah dengan kemiringan lebih curam mengalami erosi lebih cepat pada awal simulasi, namun proses erosi cenderung menurun seiring berjalannya waktu. Penelitian ini memberikan wawasan penting mengenai hubungan antara kemiringan lereng dan tingkat erosi, yang dapat digunakan untuk upaya mitigasi erosi dan pengelolaan sumber daya alam, khususnya dalam pengelolaan kualitas air di daerah rawan erosi.
STUDI ANALISIS PRODUKTIVITAS AKTUAL UNIT JAW CRUSHER  DI PT GUNUNG BALE Damarizky, Rico; Tuheteru, Edy Jamal; Palit, Christin; Kurniawati, Riskaviana; Marwanza, Irfan
Indonesian Mining and Energy Journal Vol. 8 No. 1 (2025): Mei
Publisher : Program Studi Teknik Pertambangan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/imej.v8i1.22307

Abstract

Bahan galian industri digunakan negara untuk pembangunan industri dalam menunjang perekonomian, hal tersebut mendorong peningkatan produksi bahan galian untuk menunjang kebutuhan untuk pembagunan. PT Gunung Bale adalah sebuah perusahaan tambang yang bergerak pada penambangan pirofilit dengan metode tambang terbuka, material tersebut diproses secara kominusi atau pengecilan ukuran butir pada site crushing plant. Metode yang digunakan adalah pengamatan yang dilakukan secara aktual dilapangan dan metode kuantitatif. Pengambilan data dilakukan dengan mengamati kegiatan crusher. Tujuan penelitian ini adalah untuk mengetahui tingkat produktivitas aktual jaw crusher.
Co-Authors Aditya Saputra Afiat Anugrahadi Afiat Anugrahadi Afiat Anugrahadi Ahmad Helman Hamdani Alvando Alone, Marcel Samuel Anak Agung Istri Sri Wiadnyani Andriyani Andriyani Andry Prima Ardiansyah Ardiansyah Arinda Ristawati Arkaan, Muhammad Dzaki Aryanto, Reza Azizi, Masagus Ahmad Bani Nugroho Bani Nugroho Bani Nugroho Chairul Nas Chairul Nas Chairul Nas Chairul Nas Christin Palit Damarizky, Rico Danu Putra Danu Putra Dewi Kumala Salim Djoko Hartanto Emmy Fatmi B. I. Emmy Fatmi Budhya Fadliah Fadliah Faisal Rachman Franko Sajow Darren Gumay, Rhazes Eesha Havidh Pramadika Himmes Fitra Yuda Idris Juradi, Muhammad IIT ADHITIA iputu rama aryawan Ivetta Ivetta Iyan Haryanto Jeremy Gerald Puglisi Karim, Razak Khuzaimah Arifin Korra Herdyanti, Mixsindo Kurniawati, Riskaviana M Kemal Ghifari M. A. Azizi M. Puspita Maulida, Fajri Mixsindo Korra Herdyanti Mohamad Nur Hariawan Muhammad Agus Kamardi Muhammad Agus Karmadi Muhammad K. Ghifari Muhammad Kemal Ghifari Muhammad Napis Fikri Muhammad Rahthin Qinthara Muhammad Taufiq Fathaddin, Muhammad Taufiq Nadya A. Hartanti Nadya A. Hartanti Nas, Chairul Nas, Chairul Palit, Christin Pandiangan, Violeta Apriani Panjaitan Novi Hartami Patian, Syamidi Permatasari, Claudia Intan Prapansya, Onnie Ridaliani Prasta Kumarana Garnika Purwiyono, Taat Tri Putra, Danu Ratna Ediati Reza Aryanto Ririn Yulianti Rita Sundari Rita Sundari Rosmalia Nugraheni Rully Naufal Falih Safitri, Diah Utami Sahetapy, Silvia Immanuela Sekar Tika Sari Simon Fides Singgih Irianto Trisilo Hadi Solihin Subandrio Subandrio Suherman Dwi Nuriana Suherman Dwi Nuryana Suliestyah Sundari, Rita Susanti, Chiesa Artamevia Diva Syamidi Patian Syamidi Patian Taat Tri Purwiyono Theresa Naomi Putri Tuheteru, Edy Jamal Untung Sumotarto W. Dahani Wahyu Gendam Prakoso Wiwik Dahani Wiwik Dahani Wiwik Dahani Wiwik Dahani Wiwik Dahani wiwik dahani, wiwik Y. Maulana Yansen Barus Yuga Maulana Yulianti, Ririn Ziad S Zulfahmi Zulfahmi