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Subandrio
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PENGARUH UKURAN PARTIKEL DAN pH TERHADAP KADAR KONSENTRAT PADA GRAFIT MENGGUNAKAN METODE FLOTASI Elsa Sabrina Faradiva Cutrisna; Subandrio; Christin Palit
Jurnal Eksakta Kebumian Vol. 4 No. 1 (2025): JURNAL EKSAKTA KEBUMIAN (JEK)
Publisher : Fakultas Teknologi Kebumian dan Energi, Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/

Abstract

Penelitian ini bertujuan untuk meningkatkan kadar karbon grafit melalui metode flotasi dengan mempelajari pengaruh variasi ukuran partikel dan pH terhadap proses flotasi. Sampel grafit  dianalisis menggunakan metode X-Ray Diffraction (XRD) untuk mengetahui komposisi mineralnya. Hasil analisis XRD menunjukkan bahwa sampel grafit mengandung Carbon Graphite, Quartz (SiO₂), serta pengotor lainnya seperti Birnessite, Lithiumaluminosilicate, dan Kalsit. Pengujian kadar karbon dilakukan menggunakan LECO Carbon Analyzer, yang menunjukkan kadar karbon awal dalam grafit sebesar 1,24%. Variasi ukuran partikel yang digunakan meliputi +80 mesh, -80+120 mesh, dan -120+200 mesh, dengan variasi pH antara 5 hingga 11. Hasil flotasi menunjukkan bahwa pH 7–9 menghasilkan kadar karbon tertinggi dalam konsentrat, dengan pH 9 dan fraksi -80# +120# menghasilkan kadar karbon 1,42%. Penggunaan Na₂SiO₃ sebagai depresan dan CuSO₄ sebagai pH modifier berperan penting dalam meningkatkan selektivitas flotasi, memisahkan mineral gangue, dan meningkatkan kadar karbon dalam konsentrat. Berdasarkan hasil ini, pH optimal dan ukuran partikel halus terbukti menjadi faktor kunci dalam meningkatkan efisiensi flotasi grafit.   This research aims to enhance graphite carbon content through the flotation method by studying the effect of particle size and pH variations on the flotation process. The graphite sample was analyzed using X-Ray Diffraction (XRD) to determine its mineral composition. XRD analysis results showed that the graphite sample contains Carbon Graphite, Quartz (SiO₂), and other impurities such as Birnessite, Lithiumaluminosilicate, and Calcite. Carbon content testing was conducted using a LECO Carbon Analyzer, which indicated an initial carbon content in the graphite of 1.24%. Particle size variations used included +80 mesh, -80+120 mesh, and -120+200 mesh, with pH variations ranging from 5 to 11. The flotation results demonstrated that pH 7–9 yielded the highest carbon content in the concentrate, with pH 9 and the -80# +120# fraction producing a carbon content of 1.42%. The use of Na₂SiO₃ as a depressant and CuSO₄ as a pH modifier played an important role in increasing flotation selectivity, separating gangue minerals, and enhancing the carbon content in the concentrate. Based on these results, optimal pH and fine particle size proved to be key factors in improving graphite flotation efficiency.
ANALISIS PENGARUH JENIS KOLEKTOR, PH, DAN UKURAN PARTIKEL PADA FLOTASI BIJIH EMAS TERHADAP PEROLEHAN RECOVERY Muhammad Fazjry Tri Nugroho; Subandrio; Christin Palit
Jurnal Eksakta Kebumian Vol. 4 No. 1 (2025): JURNAL EKSAKTA KEBUMIAN (JEK)
Publisher : Fakultas Teknologi Kebumian dan Energi, Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/

Abstract

Penelitian ini menganalisis pengaruh jenis kolektor, pH, dan ukuran partikel pada proses flotasi bijih emas terhadap perolehan recovery. Eksperimen flotasi dilakukan menggunakan Dithiophosphate dan Xylene sebagai kolektor, dengan variasi tingkat pH (6, 8, dan 10) serta fraksi ukuran partikel (-200#+230# dan -230#+250#). Hasil penelitian menunjukkan bahwa Dithiophosphate secara konsisten menghasilkan tingkat recovery yang jauh lebih tinggi dibandingkan dengan Xylene. Kondisi optimal untuk perolehan emas teridentifikasi saat menggunakan kolektor Dithiophosphate, dengan fraksi ukuran partikel -230#+250#, dan pH 8, mencapai recovery maksimum sebesar 66.0%. Sebaliknya, recovery terendah sebesar 19.8% diamati pada penggunaan kolektor Xylene, fraksi ukuran partikel -230#+250#, dan pH 6. Temuan ini menggarisbawahi peran penting jenis kolektor, ukuran partikel, dan pH dalam mengoptimalkan proses flotasi emas.   This study investigated the influence of collector type, pH, and particle size on the flotation process of gold ore to enhance recovery. Flotation experiments were conducted using Dithiophosphate and Xylene as collectors, with varying pH levels (6, 8, and 10) and particle size fractions (-200#+230# and -230#+250#). The results indicated that Dithiophosphate consistently yielded significantly higher recovery rates compared to Xylene. The optimal conditions for gold recovery were identified using Dithiophosphate as the collector, with a particle size fraction of -230#+250# and a pH of 8, achieving a maximum recovery of 66.0%. Conversely, the lowest recovery of 19.8% was observed with Xylene as the collector, a particle size fraction of -230#+250#, and a pH of 6. These findings highlight the critical role of collector type, particle size, and pH in optimizing gold flotation processes.
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.
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.
Co-Authors Abdalrazaq, Eid Abdul Karim Adhe Ismail Ananda Alvando Alone, Marcel Samuel Arfiani Nur Aryanto, Reza Budianto Christin Palit Dedi Wahyudi Elsa Sabrina Faradiva Cutrisna Fachry Abda El Rahman Fadliah Fadliah, Fadliah Fernandez, Zicco Ghanima Yasmaniar Hasri Hasri Husla, Ridha Indah Raya Irfan Marwanza Kollur, Shivaa Prasad Korra Herdyanti, Mixsindo Kurniawati, Riskaviana La Ode Aris Laxmi Lie, Nobel Alief Madani Saputra, Naufal Mafrino , Jorghi Meilaty Finthariasari Muhammad Burhannudinnur Muhammad Fazjry Tri Nugroho Nurul Utami Palit, Christin Paulina Taba Putra, Danu Saputra , Andika M Saputra, Lalu Qobil Rahman Septiano, Michael Siti Hermina Suliestyah Sulistiani Jarre Syahruddin Kasim Wahid Wahab, Abdul Widayati Putri, Tri wiwik dahani, wiwik Zahra, Audrey