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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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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.
Co-Authors Afiat Anugrahadi 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 Dewandaru, Sawung Panggali 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 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 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 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 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