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All Journal Rekayasa Mesin Sinergi Jurnal Geomine Indonesian Mining Journal Prosiding Temu Profesi Tahunan PERHAPI Abdimas Universal INDONESIAN MINING PROFESSIONALS JOURNAL Journal of Multidisciplinary Applied Natural Science INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY Jurnal AKAL: Abdimas dan Kearifan Lokal Indonesian Mining and Energy Journal JURNAL ABDI MASYARAKAT INDONESIA (JAMIN) Jurnal Geominerba International Journal of Innovation in Mechanical Engineering and Advanced Materials Jurnal Migasian Jurnal Pengabdian Masyarakat Indonesia (JPMI)
Irfan Marwanza
Universitas Trisakti
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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ANALISIS PENENTUAN JARAK TITIK INFORMASI DAN KLASIFIKASI SUMBER DAYA ENDAPAN NIKEL LATERIT BERDASARKAN ANALISIS VARIOGRAM Irfan Marwanza; Chairul Nas; Theresa Naomi Putri; Ahmad Helman Hamdani; Iyan Haryanto
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 1 No 1 (2017): Jurnal Geominerba - 2017
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v1i1.120

Abstract

Estimation process of precipitated mineral deposit is usually done by using conventional method which is only based on sample position. The accurate estimation method, that includes spatial and temporal continuity, is considered important, and a method that takes account of this continuity is Kriging Method. A study will be conducted by making laterite nickel zonation, based on degree of drill core (coring), while content appraisal and nickel resource comparison in block model will use Kriging Method. Data of this study is taken from southern block exploration of PT. Haltim, Wailukum, district of East Halmahera, North Maluku. Description method isused to analyse assay data, lithology, collar, and bore hole survey. Analysis method is done by using Surpac 6.3 software. Through block model result, it is found that the spread of nickel, ferrum, MgO, SiO2 and cobalt is in every percentage of the level. This method will generate experimental Variogram using lag value, nugget effect and sill that should be taken into account to make an accurate estimation result. The classification is done based on thickness and weighting of saprolite zone in southern block. The result of classification using sill method for saprolite zone is one third sill for measuring area of 35 meter, and two third sill for appointed area of 55 meter. For that reason, in this study area, for 50 meter gap of bore hole is classified as appointed area.
Analisis Penurunan Konsentrasi Gas Karbon Monoksida (CO) Pada Saluran Ventilasi di Area Belokan Menggunakan Model Fisik Terowongan Skala Laboratorium Ririn Yulianti; Panjaitan Novi Hartami; Edy Jamal Tuheteru; Yuga Maulana; Irfan Marwanza; Sekar Tika Sari
Jurnal Geomine Vol 11, No 1 (2023): April 2023
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v11i1.1270

Abstract

Carbon monoxide (CO) gas is one of the harmful and toxic gases derived from the residue of blasting and incomplete combustion of mining equipment machines in underground mines. CO gas dilution is carried out with the intention of unsafe conditions in the mining area. The purpose of this study was to determine the decrease in CO gas based on the value of the diffusion coefficient and by making a 1:10 scale tunnel model with a 90° turning vent duct flow direction using an elbow according to the actual situation. XC 13 B and XC 13 NRTH in the Cikoneng block, PT Cibaliung Sumberdaya is used as a reference for the tunnel model. The study was carried out with variations in the position of the vent duct to determine the speed of decrease in the CO concentration tested. This study was conducted using secondary and primary data which is expected to get the results of the influence of the concentration of CO gas itself and the influence of vent duct placement on the direction of flow on the decrease in CO gas concentration.
Metode Nearest Neigbout Point (NNP) dan Inverse Distance Weighting (IDW) dalam Estimasi Sumber Daya Batubara, di PT X, Sumatera Selatan. iputu rama aryawan; Irfan Marwanza; Taat Tri Purwiyono; Riskaviana Kurniawati
Indonesian Mining and Energy Journal Vol. 6 No. 1 (2023): Mei
Publisher : Program Studi Teknik Pertambangan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/imej.v6i1.15990

Abstract

Penelitian estimasi sumber daya batubara ini dilakukan pada PT X di daerah Pagar Gunung, Kabupaten Lahat , Sumatera Selatan yang terletak antara 103°31' Bujur Timur hingga 103°32' Bujur Timur dan 3°54' Lintang Selatan hingga 3°55' Lintang Selatan. Penelitian dilakukan untuk mengetahui model dan estimasi sumber daya batubara. Penelitian dilakukan dengan menggunakan metode Inverse Distance Weighting (IDW) menggunakan perangkat lunak software minitab 17 dan software Surfer, dengan setiap data berpengaruh terhadap hasil prediksi yang sesuai dengan bobotnya. IDW digunakan untuk memprediksi suatu titik dengan perhitungan matematis dari nilai titik dengan pertimbangan fungsi jarak. NNP digunakan untuk mencari poligon contoh terdekat dari titik terdekat.
LAND SUBSIDENCE AND GEOTECHNICAL IMPACT OF JAKARTA KOTA AREA Irfan Marwanza; Afiat Anugrahadi; Untung Sumotarto; Riskaviana Kurniawati; Himmes Fitra Yuda; Rosmalia Nugraheni
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 6, NUMBER 2, OCTOBER 2023
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v6i2.13981

Abstract

Land subsidence has long occurred around the Special Capital Region of Jakarta. It is important to know and deal with Land subsidence events which also cause various negative impacts. Aim: When large amounts of groundwater are withdrawn from certain types of rocks, such as fine-grained sediments, land subsidence occurs. The rock compacts because the water helps to keep the ground in place. When the water is removed, the rocks collapse in on themselves.The immediate impact is the building collapse around the Kota Tua of DKI Jakarta. Methodology and Results: The research method used is a quantitative descriptive survey method by observing the amount of land subsidence that occurs in the Kota Tua area and its surroundings. The results showed that there has been a vertical land subsidence that varies between 20-60 cm. Based on the results of the resistivity values and coordinates plotted on the Regional Geological Map (Jakarta and Kep Seribu), the research location is classified into Lithology: Clay, Sand Silt, Gravel, and Pebbles (Quartenary deposits). The phenomenon, land subsidence, is caused by a combination of various parameters, including natural consolidation of alluvial soils, excessive groundwater extraction, and also building loads from infrastructure development and tectonic factors. Conclusion, significance, and impact study: Knowing the value of land subsidence and its location is expected to support urban planning, basic infrastructure planning and development, housing, settlement planning, and local financial improvement in efforts to mitigate land subsidence disasters.
PENDAMPINGAN TEKNIS MASYARAKAT DESA SIRNAJAYA DALAM MENGHADAPI RISIKO BENCANA TANAH LONGSOR Iit Adhitia; Wahyu Gendam Prakoso; Irfan Marwanza; Muhammad Agus Kamardi; 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.
Pelatihan Pembuatan Mineral Tawas Berbahan Dasar Limbah Kaleng Bekas Bagi Masyarakat Sukmajaya, Depok Riskaviana Kurniawati; Wiwik Dahani; Irfan Marwanza; Fadliah Fadliah; Arinda Ristawati; Muhammad Napis Fikri
Abdimas Universal Vol. 6 No. 2 (2024): Oktober (In Press)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Balikpapan (LPPM UNIBA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/abdimasuniversal.v6i2.305

Abstract

All human activities inevitably produce waste. The amount of waste increases as the city grows. Sukmajaya District, Depok City is one of the districts that has the potential for very high waste accumulation. This area is a place for immigrants who work in Jakarta. This has a negative impact, namely the increase in the number of Final Disposal Sites (TPA) from year to year. The recycling process is a solution that can save energy and reduce landfill waste. The use of can waste as raw material in making alum or potassium aluminate sulfate K[Al(SO4)2.12H2O] is very relevant. The basic material used in making alum cans has the advantage of being more economical and can help reduce packaging can waste which has the potential to pollute the environment. The team held training in making alum minerals from used can waste in Sukmajaya District, Depok City. This activity aims to educate the public in utilizing used can waste into alum mineral products. People can use it to purify water in an environmentally friendly and economical way. The results of the training activities showed an increase in participants' awareness and skills in managing canned waste into value-added products. The number of training participants increased from 40% before training to 90% after training. Apart from that, participants' skills in making alum from used can waste also increased from 25% before the training to 85% after the training. It is hoped that this training can make a positive contribution in efforts to manage waste sustainably and protect the environment.
Pembinaan Penambangan Emas Skala Kecil dan Masyarakat Lingkar Tambang Emas di Desa Cisarua, Bogor Irfan Marwanza; Masagus Ahmad Azizi; Riskaviana Kurniawati; Wiwik Dahani; Subandrio Subandrio; Taat Tri Purwiyono; Suherman Dwi Nuriana
Abdimas Universal Vol. 6 No. 2 (2024): Oktober (In Press)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Balikpapan (LPPM UNIBA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/abdimasuniversal.v6i2.463

Abstract

The Trisakti University Community Service Program (PKM) was carried out in Cisarua Village, Nanggung District, Bogor Regency, West Java, in collaboration with the local Regional Government. Stakeholder partners served as facilitators for this project, which aimed to socialize and establish sustainable mining practices for miners and communities around gold mines. Cisarua Village, located in Nanggung Regency, is known for having potential mineral resources, particularly gold deposits, which are often collected by mining communities both individually and collectively. However, this mining activity has major negative effects, leading the government to stop it, one of which being its damaging environmental impact. Environmental issues and land conditions following gold mining provide significant risks and concerns, including mercury and cyanide contamination, which are harmful to human life and the surrounding environment. One of the most significant issues has been the lack of reclamation of mine holes caused by human mining activity. Based on these issues, the team demonstrated the public on good and correct mining practices (GMP). The team is collaborating with local communities and governments to develop ways to predict future implications of gold mining activities. PKM activities are carried out by offering materials and discussions that have proven effective in developing community knowledge. The survey of 25 respondents showed that a greater understanding of good mining practices. Survey results show that previously 61% of respondents did not understand about GMP. After implementing education and training through PKM, there was an increase of 11% in understanding of GMP. This shows the effectiveness of the program in increasing awareness and knowledge about good and correct mining practices among participants.
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.
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.
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%.
Co-Authors Adhitia, Iit 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 Daffa Rahmawan Rahmat Dalimunthe, Yusraida Khairani Damarizky, Rico Danu Putra Danu Putra Darren, Franko Sajow Dewi Kumala Salim Djoko Hartanto Emmy Fatmi B. I. Emmy Fatmi Budhya Fadliah Fadliah Faisal Rachman Franko Sajow Darren Gumay, Rhazes Eesha Hadi, Singgih Irianto Trisilo Hartami, Pantjanita Novi Havidh Pramadika Herdyanti, Mixsindo Korra Himmes Fitra Yuda Idris Juradi, Muhammad IIT ADHITIA iputu rama aryawan Ivetta Ivetta Iyan Haryanto Jeremy Gerald Puglisi Kamardi, Muhammad Agus Karim, Razak Karmadi, Muhammad Agus Khuzaimah Arifin Kirikanang, Cameron Russell Korra Herdyanti, Mixsindo Kurniawati, Riskaviana M Kemal Ghifari M. A. Azizi M. Puspita M. Taufiq Fathaddin Maulana, Yuga Maulida, Fajri Mixsindo Korra Herdyanti Mohamad Nur Hariawan Muhammad Agus Kamardi 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 Ramadhan, Rudi Ratna Ediati Reza Aryanto Ririn Yulianti Rosmalia Nugraheni Rully Naufal Falih Safitri, Diah Utami Sahetapy, Silvia Immanuela Sekar Tika Sari Simon Fides Singgih Irianto Trisilo Hadi Solihin Solihin Subandrio Subandrio 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 Wahyu Gendam Prakoso, Wahyu Gendam 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