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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
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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.
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.
PENINGKATAN KAPASITAS PENGELOLAAN LINGKUNGAN TAMBANG EMAS MELALUI MONITORING AIR DAN TANAH Yulianti, Ririn; Jamal Tuheteru, Edy; Palit, Christin; Kurniawati, Riskaviana; Nuryana, Suherman Dwi; Dewandaru, Sawung Panggali; Siahaan, Muhammad Dian Syahputra
Jurnal Abdi Masyarakat Indonesia (JAMIN) Vol 7 No 2 (2025): JURNAL ABDI MASYARAKAT INDONESIA (JAMIN)
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jamin.v7i2.24407

Abstract

Kegiatan pengabdian kepada masyarakat ini dilaksanakan di wilayah IUP Operasi Produksi Arinem, Papandayan, Jawa Barat, yang memiliki potensi mineralisasi emas epitermal namun juga menghadapi tantangan pencemaran lingkungan akibat aktivitas penambangan. Tujuan utama kegiatan adalah meningkatkan kapasitas teknis pengelolaan lingkungan tambang melalui monitoring kualitas air dan tanah serta penyusunan rekomendasi reklamasi berbasis data. Metode yang digunakan meliputi pengambilan sampel air dan tanah di dua titik lokasi, analisis laboratorium terhadap parameter fisik dan kimia, serta interpretasi hasil berdasarkan baku mutu yang diatur di Indonesia. Hasil menunjukkan bahwa kualitas air di kedua lokasi memiliki pH sangat asam dan kandungan logam berat seperti tembaga dan seng yang melebihi ambang batas, sementara tanah menunjukkan pH rendah, kandungan fosfor sangat rendah, dan potensi toksisitas mangan. Berdasarkan temuan tersebut, strategi teknis yang direkomendasikan dari berbagai kajian yang telah dilakukan meliputi netralisasi pH dengan kapur, pembuatan kolam sedimentasi, fitoremediasi dengan tanaman lokal, serta pemupukan organik. Kegiatan ini berhasil memberikan pemahaman praktis kepada teknisi lapangan dan menjadi pertimbangan pengelolaan lingkungan yang dapat diterapkan untuk mendukung reklamasi tambang emas berkelanjutan.
OPTIMASI UKURAN PARTIKEL DAN KEMIRINGAN MEJA PADA PROSES KONSENTRASI BESI MENGGUNAKAN SHAKING TABLE Saputra, Lalu Qobil Rahman; Subandrio; Palit, Christin; Kurniawati, Riskaviana; Dahani, Wiwik
Indonesian Mining and Energy Journal Vol. 8 No. 2 (2025): November
Publisher : Program Studi Teknik Pertambangan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/imej.v8i2.20793

Abstract

Penelitian ini bertujuan untuk mengkaji pengaruh variasi ukuran partikel dan sudut kemiringan meja goyang terhadap peningkatan kadar dan recovery besi (Fe) dari pasir besi menggunakan metode meja goyang. Sampel dipisahkan menjadi tiga ukuran partikel (+100 mesh, +140 mesh, dan -140 mesh) dan diuji pada tiga sudut kemiringan meja (2,8°, 3°, dan 3,3°). Hasil menunjukkan bahwa kombinasi ukuran -140 mesh dan kemiringan 2,8° menghasilkan recovery tertinggi sebesar 177,11%. Analisis menggunakan metode Taguchi dengan pendekatan Larger is Better menunjukkan bahwa ukuran partikel merupakan faktor paling dominan dalam menentukan efisiensi pemisahan. Temuan ini menegaskan pentingnya optimasi parameter operasi shaking table dalam meningkatkan perolehan konsentrat Fe dari pasir besi.
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.
Dari Jelantah ke Cuci Tangan: Mendaur Ulang Minyak Goreng Bekas Ayam UMKM menjadi Sabun Cair Berbasis Komunitas di Jabodetabek Irfan Marwanza; Wiwik Dahani; Subandrio; Riskaviana Kurniawati; Daffa Rahmawan Rahmat; Yusraida Khairani Dalimunthe
Jurnal Migasian Vol 10 No 1 (2026): Jurnal Migasian
Publisher : LPPM Institut Teknologi Petroleum Balongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36601/jm.v10i1.385

Abstract

Minyak jelantah adalah minyak yang telah digunakan lebih dari sekali dalam proses penggorengan makanan. Limbah minyak jelantah, menjadi persoalan lingkungan dan kesehatan masyarakat yang signifikan. Pembuangan sembarangan dapat mencemari tanah dan perairan, sementara penggunaan berulang berisiko terhadap kesehatan. Di sisi lain, akses terhadap produk kebersihan yang terjangkau tetap menjadi perhatian. Pemanfaatan limbah minyak jelantah sebagai bahan baku sabun menawarkan solusi potensial berbasis ekonomi sirkular. Pengabdian kepada masyarakat ini bertujuan untuk (1) memberdayakan mitra UMKM D’Besto dalam mengelola limbah jelantahnya secara bernilai ekonomis, (2) mentransfer teknologi sederhana pembuatan sabun cuci tangan cair kepada masyarakat sekitar, dan (3) meningkatkan kesadaran tentang pengelolaan limbah dan praktik hidup bersih. Metode pelaksanaan mencakup survei awal, sosialisasi, pelatihan pembuatan sabun cair melalui proses saponifikasi dingin dengan penambahan gliserin dan essential oil, serta evaluasi partisipatif melalui kuesioner dan observasi. Pelatihan berhasil dilaksanakan dengan partisipasi aktif. Sabun cuci tangan cair yang dihasilkan memenuhi parameter fisik (viskositas, warna, bau) yang dapat diterima dan efektif sebagai pembersih. Terjadi peningkatan pengetahuan peserta sebesar 85% mengenai bahaya jelantah dan teknik daur ulangnya. Mitra UMKM menyepakati sistem pengumpulan jelantah berkelanjutan. Minyak jelantah dari UMKM pangan berpotensi diupcycle menjadi produk sabun cair yang bermanfaat secara efektif. Pendekatan partisipatif berbasis masyarakat ini tidak hanya mengurangi limbah tetapi juga menciptakan produk kebersihan mandiri, mendorong ekonomi sirkular lokal, dan meningkatkan literasi lingkungan warga.
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.
Peningkatan kesadaran keselamatan dan ergonomi kerja pada industri konveksi busana muslim melalui pelatihan berbasis K3 teknik perminyakan Aqlyna Fattahanisa; Havidh Pramadika; Marmora Titi Malinda; Riskaviana Kurniawati; Arinda Ristawati; Hayyan Muhammad
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 10, No 4 (2026): August (In Progress)
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v10i4.40334

Abstract

AbstrakIndustri konveksi busana muslim merupakan bagian dari UMKM yang memiliki peran penting dalam perekonomian masyarakat, tetapi sering mengabaikan aspek keselamatan dan kesehatan kerja (K3) serta ergonomi. Pekerja biasanya duduk dalam waktu lama dan menangani material secara manual, sehingga berisiko mengalami gangguan muskuloskeletal. Kegiatan pengabdian masyarakat ini bertujuan untuk meningkatkan kesadaran, pengetahuan, dan keterampilan pekerja konveksi dalam menerapkan prinsip K3 dan ergonomi, serta mengadaptasi konsep K3 Teknik Perminyakan ke sektor non-migas. Mitra kegiatan ini adalah Konveksi Busana Muslim Tachi Syari di Kota Bekasi, dengan sembilan peserta pelatihan. Metode yang digunakan meliputi observasi dan identifikasi risiko, penyuluhan, demonstrasi dan praktik ergonomi serta manual handling, penyediaan sarana ergonomis dan alat pelindung diri (APD), pendampingan penataan ruang kerja, serta penyusunan prosedur keselamatan. Evaluasi dilakukan dengan kuesioner Nordic Body Map (NBM), tes pengetahuan sebelum dan sesudah pelatihan, serta kuesioner kepuasan peserta. Hasilnya, nilai pengetahuan rata-rata meningkat dari 77,22% (kategori Cukup) menjadi 90,00% (kategori Baik), naik 12,78 poin persentase, dan semua peserta (100%) mencapai kategori Baik. Penilaian NBM menunjukkan bahawa semua pekerja berada dalam kategori risiko rendah. Tingkat kepuasan peserta mencapai 91,33% dan semua peserta menyatakan bahwa mereka sangat puas. Kegiatan ini terbukti efektif dalam membangun budaya kerja yang aman dan ergonomis di UMKM konveksi serta memperluas penerapan ilmu K3 ke berbagai sektor. Kata kunci: K3; ergonomi; konveksi; APD; musculoskeletal. AbstractThe Muslim fashion convection industry is part of the MSMEs that plays a vital role in the community's economy, but often neglects aspects of occupational safety and health (K3) and ergonomics. Workers typically sit for long periods and handle materials manually, putting them at risk of musculoskeletal disorders. This community service activity aims to increase the awareness, knowledge, and skills of convection workers in applying K3 and ergonomics principles, as well as adapting the K3 concept of Petroleum Engineering to the non-oil and gas sector. This activity partner is Konveksi Busana Muslim Tachi Syari in Bekasi City, with nine training participants. The methods used include observation and risk identification, counseling, demonstrations and practices of ergonomics and manual handling, provision of ergonomic facilities and personal protective equipment (PPE), assistance in arranging workspaces, and developing safety procedures. Evaluation was carried out using the Nordic Body Map (NBM) questionnaire, pre- and post-training knowledge tests, and participant satisfaction questionnaires. As a result, the average knowledge score increased from 77.22% (Sufficient category) to 90.00% (Good category), an increase of 12.78 percentage points, and all participants (100%) achieved the good category. The NBM assessment showed that all workers were in the low-risk category. The participant satisfaction level reached 91.33% and all participants stated that they were very satisfied. This activity has proven effective in building a safe and ergonomic work culture in the garment MSME and expanding the application of OHS knowledge to various sectors. Keywords: occupational safety; ergonomics; garment workshop; PPE; musculoskeletal.
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