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All Journal Rekayasa Mesin Jurnal Teknologi Mineral dan Batubara Syntax Literate: Jurnal Ilmiah Indonesia SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Abdimas Universal 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 Migasian Jurnal Teknologi Mineral dan Batubara
Kurniawati, Riskaviana
Universitas Trisakti
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Transportation Other

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Analisis Pengaruh Waktu Electrowinning Timbal dari Konsentrat Galena Riskaviana Kurniawati; Subandrio Subandrio
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (234.712 KB) | DOI: 10.36418/syntax-literate.v7i9.9383

Abstract

Galena (PbS) merupakan salah satu dari sedikit mineral yang bereaksi dengan asam nitrat dengan produk timbal nitrat. Larutan kemudian di electrowinning elektrolisis untuk mendapatkan timbal di katoda. Metode ini dapat menghilangkan banyak langkah pirometalurgi dan menghindari polusi udara sehingga lebih ramah lingkungan Pada penelitian ini terfokus pada pengaruh waktu electrowinning pada konsentrat galena. Konsentrat galena awal mengandung 17,9% Pb dilakukan proses leaching-electrowinning dengan variasi waktu electrowinning 30,60,90,120, dan 150 menit. Semakin lama waktu sampai 90 menit konsentrasi Pb meningkat, namun terjadi penurunan setelah 120 dan 150 menit. Titik maksimum dan optimum waktu electrowinning konsentrat galena pada suhu 50°C, yaitu pada 90 menit dengan konsentrasi Pb sebesar 86,9%.
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.
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.
SOSIALISASI JARINGAN GAS PERKOTAAN BAGI MASYARAKAT Ristawati, Arinda; Prima, Andry; Yulia, Prayang Sunny; Kurniawati, Riskaviana; Puspitosari, Meldinar Riska; Fattahanisa, Aqlyna; Wijayanti, Puri; Aryanto, Reza
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.v5i1.15730

Abstract

Socialization of the utilizations and advantages of city gas is a community service that aims to make people understand the growth of the urban gas distribution sector in Indonesia and provide information to the public about LPG substitute economic energy sources. Gas network for households means distributing gas through pipes to households. The limited availability of household gas in DKI Jakarta made this socialization theme raised. The location chosen is the Tanjung Gedong area, Tomang-sub distrct, Grogol Petamburan district, West Jakarta, which in this case, the area is a densely populated area, especially family settlements. The participants who took part in this community service were housewives.  The method used is to provide socialization about the urban gas network developed by the government for household gas purposes, the socialization is carried out online with the zoom facility and some others offline in the community while still using the existing health protocol. The result of this community service activity is that the public is able to recognize and understand the existence of a gas network whose infrastructure development is being developed by the government through PT PGN Tbk. This community service makes the community clearly aware of the flow in the “jargas” development program.
Pengaruh pH dan Ukuran Partikel Dalam Proses Flotasi Bijih Nikel Limonit Lie, Nobel Alief; Subandrio; Palit, Christin; Dahani, Wiwik; Kurniawati, Riskaviana; Fadliah
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.v6i2.19244

Abstract

Peningkatan konsumsi nikel mencapai 17,2 % pada tahun 2021. Hal ini mempengaruhi jumlah sumberdaya dan cadangan nikel terutama bijih laterit. Peningkatan produksi nikel laterit diakibatkan karena berkurangnya pasokan nikel sulfida berkadar tinggi. Oleh karena itu perlu dilakukannya proses yang lebih ekonomis untuk memperoleh nikel dari sumberdaya, salah satunya dengan metode flotasi. Pada penelitian kali ini berfokus pada permasalahan pengaruh pH dan ukuran partikel dalam pengolahan bijih nikel limonit dengan metode flotasi. Tujuan dari penelitian ini adalah untuk mendapatkan data-data terkait optimalisasi variabel flotasi yaitu pH dan ukuran partikel yang berkaitan dengan hasil recovery dari hasil flotasi. Adapun variabel flotasi yang dianalisis yaitu ukuran partikel -100+120 mesh, -120+170 mesh, -170+200 mesh, -200 mesh dan pH larutan 9, 10, 11. Variabel tetap pada proses flotasi ini adalah waktu aerasi 10 menit, persen padatan 25%, dosis kolektor asam oleat 1000 g/ton, dosis depresan sodium silikat 1500 gr/ton dan frother pine oil 85 gr/ton. Hasil dari penelitian ini menunjukan bahwa pH dan ukuran partikel berpengaruh dalam kestabilan proses flotasi. Kemudian didapatkan hasil flotasi terbaik yaitu pada kondisi pH 10 dan ukuran -170+200 mesh dengan nilai recovery sebesar 85,30%.
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.
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.
Co-Authors Afiat Anugrahadi Andry Prima Aqlyna Fattahanisa Arinda Ristawati Arinda Ristawati Aryandi, Firman Aryanto, Reza Azizi, Masagus Ahmad Chairul Nas Daffa Rahmawan Rahmat Dalimunthe, Yusraida Khairani Damarizky, Rico Darren, Franko Sajow Devin Indra Novega Dewandaru, Sawung Panggali Dina Asmaul Chusniyah Emmy Fatmi Budhya Fachry Abda El Rahman Fadliah Fadliah Fadliah Fadliah, Fadliah Fadliah, Fadliah Faisal Rachman Faldo Matulessy Firman Aryandi Franko Sajow Darren Hadi Purnomo Havidh Pramadika Hayyan Muhammad Himmes Fitra Yuda iputu rama aryawan Irfan Marwanza kartika fajarwati hartono Lailatul Wastiyah Lie, Nobel Alief Marmora Titi Malinda Maulani, Mustamina Muhammad Napis Fikri Mustamina Maulani Nas, Chairul Nugraeni, Crhistine Dyta Nur Hayati Palit, Christin Patian, Syamidi Puri Wijayanti, Puri Puspitosari, Meldinar Riska Reno Pratiwi Reno Pratiwi Ristawati, Arinda Rosmalia Nugraheni Said, Ardhia Regita Cahyani Samura, Lisa Saputra, Lalu Qobil Rahman Septiano, Michael Shima Parameswari Adji Siahaan, Muhammad Dian Syahputra Subandrio Subandrio Subandrio, Subandrio Suherman Dwi Nuriana Suherman Dwi Nuryana Suliestyah Suliestyah, Suliestyah Sundari, Rita Syamidi Patian Syamidi Patian Syarif, Iif Ahmad Taat Tri Purwiyono Tuheteru, Edy Jamal Untung Sumotarto Wiwik Dahani Wiwik Dahani Wiwik Dahani Wiwik Dahani Wiwik Dahani wiwik dahani, wiwik Yulia, Prayang Sunny Yulianti, Ririn ‘Adany, Fildzah