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All Journal Rekayasa Mesin Jurnal Teknologi Mineral dan Batubara Syntax Literate: Jurnal Ilmiah Indonesia Abdimas Universal International Journal of Community Service INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY Jurnal AKAL: Abdimas dan Kearifan Lokal Indonesian Mining and Energy Journal JURNAL ABDI MASYARAKAT INDONESIA (JAMIN) Journal of Earth Energy Science, Engineering, and Technology International Journal of Innovation in Mechanical Engineering and Advanced Materials Jurnal Teknologi Mineral dan Batubara
Kurniawati, Riskaviana
Universitas Trisakti
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Analisis Prediksi Danau Pascatambang di PT X Said, Ardhia Regita Cahyani; Tuheteru, Edy Jamal; Aryanto, Reza; yulianti, Ririn; Kurniawati, Riskaviana
Indonesian Mining and Energy Journal Vol. 7 No. 1 (2024): Mei
Publisher : Program Studi Teknik Pertambangan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/imej.v7i1.20779

Abstract

Pada saat sebuah tambang berakhir, mungkin terjadi bukaan besar atau "void". Dalam beberapa kasus, void ini hanya akan menjadi lubang besar yang tidak berguna dan dapat membahayakan lingkungan sekitar. Ada kemungkinan void ini akan berubah menjadi danau pascatambang, atau pit lake, karena ada kemungkinan air akan masuk ke dalamnya. Dengan menggunakan data curah hujan dan evaporasi dari tahun 2013–2022, penelitian ini bertujuan untuk memprediksi berapa lama waktu yang diperlukan untuk mengisi penuh lubang. Luas catchment area mempengaruhi pemilihan DTH 18 sebagai sumber pengisian utama dibandingkan dengan DTH lainnya. Dengan volume akumulasi rata-rata tahunan sebesar 21.300.247 m3, waktu yang diperlukan untuk mencapai kapasitas tampungan pit sebesar 243.402.640 m3 adalah 11,43 tahun. Ini menunjukkan bahwa pengisian dengan DTH 18 adalah sumber pengisian utama.
Training on the use of Light Fire Extinguisher for Residents in densely populated housing Duri Pulo Subdistrict, Central Jakarta Pauhesti, Pauhesti; Feni Maulindani, Sri; Hartono, Kartika Fajarwati; Kurniawati, Riskaviana; Wastiyah, Lailatul; Dolfina Kilmas, Theresia; Wayan Nanik Juliantari, Ni; Saputra, Ade Kurniawan
International Journal Of Community Service Vol. 5 No. 3 (2025): August 2025 (Indonesia - Rusia - Malaysia)
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijcs.v5i3.871

Abstract

The dense population in a residential area often faces a high risk of fire. The main factor, apart from the dense population, is also due to limited access to fire extinguishers and vulnerable environmental conditions. A simple and effective solution to handle small fires before they spread widely is to use APAR (light fire extinguishers). This Community Engagement (Community service) activity aims to increase awareness and skills among residents in the use of APAR, so that they can better prepare for potential fires. This Community service was carried out in a densely populated area in the Duri Pulo sub-district, Central Jakarta. The Community service method was carried out through counseling and direct training on how to use APAR. At the end of this activity, 10 APAR units were handed over from the COMMUNITY SERVICE FTKE Trisakti University Team to Karang Taruna DuriPulo to be distributed and installed in strategic locations within the area.
KAJIAN KANDUNGAN BESI DAN SILIKA PADA MOLTEN ALUMINIUM DALAM PROSES HALL HEROULT DENGAN METODE STATISTICAL PROCESS CONTROL DI PT X  Septiano, Michael; Subandrio; Kurniawati, Riskaviana; Dahani, Wiwik; Palit, Christin; Suliestyah
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.v8i1.22303

Abstract

Aluminium berasal dari deposit bauksit yangmengandung bijih aluminium dengan beraneka macam komposisi didalamnya. Bauksit memiliki kandungan alumina yang tinggi, yaitu sekitar 30% hingga 60% . Proses Hall Heroult adalah proses elektrokimia di mana alumina dilarutkan dalam elektrolit dan direduksi menjadi aluminium pada suhu sekitar 960 °C untuk menghasilkan aluminium. Pada proses pengolahannya alumina masih memiliki kandungan pengotor diantaranya Fe dan Si, bahkan hingga menjadi produk akhir. Penelitian ini ingin mengkaji apakah selama proses hall heroult berlangsung kandungan besi dan silika pada proses masih dalam batas pengendalian atau tidak dengan metode statistical process control dan diakhiri dengan kombinasi optimal akan kandungan besi dan silika. Hasil kajian dengan metode statistical process control dengan alat bantu control chart didapati pada X Bar Chart dan R Chart Fe Content dan Si Content pada periode bulan Juni 2023 hingga November 2023. Untuk subkelompok Fe Content masih berada dalam batas pengendalian, baik untuk rata-rata maupun variabilitas proses dikarenakan tidak menyinggung UCL X (0.170), LCL X (0.100) dan UCL R (0.144), LCL R (0). Selanjutnya untuk subkelompok Si Content pada subkelompok pertama melewati batas kendali atas pada UCL X (0.046) dan UCL R (0.022) pada titik subkelompok satu sebesar 0.049 pada X Bar Chart dan 0.023 pada R Chart, tetapi aman untuk batas kendali bawah karena tidak menyinggung atau melewati LCL X (0.035).
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.
Utilization of Coconut Shell Waste into Energy: Training for Small and Medium Enterprises" in Pasar Minggu Area, South Jakarta Ristawati, Arinda; Fattahanisa, Aqlyna; Kurniawati, Riskaviana; Pramadika, Havidh; Ridaliani Prapansya, Onnie; Ananta Ihza Hiswara, M Mirza
International Journal Of Community Service Vol. 5 No. 2 (2025): May 2025 (Indonesia - Malaysia - Timor-Leste)
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijcs.v5i2.831

Abstract

Indonesia is a tropical country with a wealth of coconut trees widespread in almost all of its territory, from Sumatra to Papua. This coconut tree has great potential that has not been fully utilized until now. Although almost all parts of the coconut have been utilized, most coconut fibers and shells are still wasted. This program aims to encourage sustainable and productive waste utilization and support the creation of independent and productive local entrepreneurs. With a focus on empowering SMEs based on local resources, this program is also expected to be able to contribute to improving the local economy and expanding employment. So that partner SMEs can produce high-quality coconut shell charcoal briquettes that are ready to be marketed and Increase the knowledge and technical skills of the trainees in processing coconut shell waste. The method of implementing the PKM program is carried out systematically through several stages to overcome the main problems faced by small and medium enterprises (SMEs) in Pasar Minggu, South Jakarta in the field of production, management, and marketing of briquette products from coconut shell waste. The implementation of this PKM program proves that with the right training, the community can be invited to utilize organic waste in products with economic value. One of the key aspects of the success of this program is involving the community in every stage of the activity. Thus, the community not only becomes passive beneficiaries but also plays an active role in the development of solutions that are by field conditions. Improving business management knowledge and skills is also an important point. The training conducted not only focused on the technical aspects of making briquettes but also on how to manage small businesses effectively with business management, as well as product marketing.
LAND SUBSIDENCE AND GEOTECHNICAL IMPACT OF JAKARTA KOTA AREA Marwanza, Irfan; Anugrahadi, Afiat; Sumotarto, Untung; Kurniawati, Riskaviana; Fitra Yuda, Himmes; Nugraheni, Rosmalia
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.
KARAKTERISTIK ABU LAYANG (FLY ASH) DARI PLTU TANJUNG SELOR DAN POTENSINYA SEBAGAI PREKURSOR MATERIAL ALUMINOSILIKAT Hayati, Nur; ‘Adany, Fildzah; Nugraeni, Crhistine Dyta; Syarif, Iif Ahmad; Kurniawati, Riskaviana
Jurnal Teknologi Mineral dan Batubara Vol 19 No 3 (2023): Jurnal Teknologi Mineral dan Batubara Edisi September 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol19.No3.2023.1499

Abstract

Around 500 million tonnes of coal combustion by-products are produced annually, with Fly Ash accounting for about 70% of the by-product. Therefore, using Fly Ash is crucial because if it is not processed and utilized correctly, it can harm the environment and human health. The use of Fly Ash is strongly influenced by its characteristics, which are different for each source because it depends on the type of coal, combustion, and cooling conditions. Therefore, characterization was carried out in this study using XRF and XRD on Fly Ash from Tanjung Selor PLTU. Based on ASTM C618, PLTU Fly Ash Tanjung Selor is class F Fly Ash because the amount of SiO2+Al2O3+Fe2O3 is 71,4% (>70%) and the amount of CaO is 13,83% (<15%). The XRD results also show that Fe2O3 and SiO2 dominate the Fly Ash with the appearance of the peak of Fe2O3 (hematite) at 2θ = 33,44; 35,57; 43,27° (PDF 01-073-0603) and SiO2 (quartz) at 2θ = 20,81; 26,63; 50,14; 57,26; 68,34° (PDF 01-085-0335). The characteristics of this Fly Ash indicate that it has the potential as a precursor for the synthesis of zeolite X and P because it has a SiO2/Al2O3 ratio of 1,63. In addition, due to the dominant Si and Al content, Fly Ash has the potential as a geopolymer precursor; the dominant Fe content (27%) can also increase the geopolymer's development strength.
TRAINING FOR HOUSEHOLD WASTE INTO EFFECTIVE MATERIALS FOR COMMUNITIES RT06/16, TOMANG, JAKARTA BARAT Fadliah, Fadliah; Dahani, Wiwik; Pratiwi, Reno; Subandrio; Aryanto, Reza; Kurniawati, Riskaviana
Jurnal Abdi Masyarakat Indonesia (JAMIN) Vol 5 No 2 (2023): JURNAL ABDI MASYARAKAT INDONESIA (JAMIN)
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jamin.v5i2.17418

Abstract

The production process with the green synthesis method is a method that is being developed in the production process for daily household needs. One of the green synthesis methods that has been developed is using waste products such as waste cooking oil (WCO) as a raw material in the soap production process. In the process of making soap, saponification reactions occur between triglycerides and fats and oils that occur in alkaline solutions. The materials used are a mixture of WCO, distilled water, and sodium hydroxide. The WCO used in this training is purified WCO with the addition of natural zeolite. Acid-activated natural zeolite, to increase its catalytic ability, is used as an adsorbent to adsorb impurities contained in WCO. The training consists of three stages: providing material about the dangers and negative effects that can be caused by using used cooking oil in everyday life for both the environment and health, the WCO cleaning process, and the utilization of purified WCO into an efficient product in the form of laundry soap. The results of the activities carried out can be seen from the discussion activities carried out after the activity took place with the partner community, which show an increase in community knowledge about how to treat waste and the potential for improving the economic situation of the community through knowledge of the soap-making process.
Optimization of Titanium Recovery from Tin Tailings Using Flotation Route Subandrio, Subandrio; Dahani, Wiwik; Sundari, Rita; Kurniawati, Riskaviana; Marwanza, Irfan; Darren, Franko Sajow
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.
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.
Co-Authors Afiat Anugrahadi Afiat Anugrahadi, Afiat Ananta Ihza Hiswara, M Mirza Andry Prima Aqlyna Fattahanisa Arinda Ristawati Aryandi, Firman Aryanto, Reza Azizi, Masagus Ahmad Chairul Nas Damarizky, Rico Darren, Franko Sajow Devin Indra Novega Dina Asmaul Chusniyah Dolfina Kilmas, Theresia Emmy Fatmi Budhya Fachry Abda El Rahman Fadliah Fadliah Fadliah Fadliah, Fadliah Fadliah, Fadliah Faisal Rachman Faldo Matulessy Feni Maulindani, Sri Firman Aryandi Fitra Yuda, Himmes Hadi Purnomo Hari Karyadi Oetomo, R. Harin Widiyatni Hartono, Kartika Fajarwati Havidh Pramadika Himmes Fitra Yuda iputu rama aryawan Irfan Marwanza Kalasnikova Suparmanto , Albert kartika fajarwati hartono Kurniawan Saputra, Ade Lailatul Wastiyah Lie, Nobel Alief Maulani, Mustamina Maulindani, Sri Feni Muhammad Napis Fikri Mustamina Maulani Nas, Chairul Nugraeni, Crhistine Dyta Nugraheni, Rosmalia Nur Hayati Palit, Christin Patian, Syamidi Pauhesti, Pauhesti Puri Wijayanti, Puri Puspitosari, Meldinar Riska Raihan Azica , Muhammad Reno Pratiwi Reno Pratiwi Ridaliani Prapansya, Onnie Ristawati, Arinda Rosmalia Nugraheni Said, Ardhia Regita Cahyani Samura, Lisa Saputra, Ade Kurniawan Septiano, Michael Shima Parameswari Adji Subandrio Subandrio Subandrio, Subandrio Suherman Dwi Nuriana Suliestyah Suliestyah, Suliestyah Sumotarto, Untung Sundari, Rita Sunny Yulia, Prayang Syamidi Patian Syamidi Patian Syarif, Iif Ahmad Taat Tri Purwiyono Tuheteru, Edy Jamal Untung Sumotarto Wastiyah, Lailatul Wayan Nanik Juliantari, Ni Wiwik Dahani Wiwik Dahani Wiwik Dahani Wiwik Dahani Wiwik Dahani wiwik dahani, wiwik Yulia, Prayang Sunny Yulianti, Ririn ‘Adany, Fildzah