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All Journal Jurnal Teknik Mesin Cakram Metalurgi
Latifa Hanum Lalasari
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Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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KELARUTAN MINERAL IKUTAN KASITERIT DALAM ASAM KLORIDA ENCER (HCl 10 %) MENGGUNAKAN REAKTOR YANG DILENGKAPI PENGADUK Latifa Hanum Lalasari
Jurnal Teknik Mesin Cakram Vol 3, No 2 (2020)
Publisher : Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jtc.v3i2.7558

Abstract

Abstrak: Telah dilakukan penelitian kelarutan mineral ikutan kasiterit (SnO2) dalam larutan asam klorida (HCl) encer menggunakan reaktor yang dilengkapi pengaduk. Tujuan penelitian adalah melakukan investigasi dalam upaya memperoleh kondisi proses yang optimum dan efisien, khususnya temperature dan waktu proses pelindian untuk menghasilkan kasiterit dengan kemurnian tinggi. Proses yang dilakukan adalah hidrometalurgi dengan melakukan proses pelindian mineral kasiterit dalam larutan HCl 10% (encer) pada kondisi tekanan atmosferik  dan variasi temperatur 35°C, 50°C, 70°C, 90°C, 110°C;  waktu proses 1, 2, 3, 4, 5, dan 6 jam. Proses pelindian menggunakan reaktor yang dilengkapi pengaduk dengan pengadukkan 300 rpm. Hasil penelitian menunjukkan larutan asam klorida (HCl) 10% mampu melarutkan mineral ikutan dari kasiterit diantaranya: besi, lantanum, cerium, titanium yang merupakan pengotor dengan jumlah besar dalam kasiterit. Kemurnian kasiterit yang diperoleh dari hasil pelindian menggunakan larutan HCl 10% (encer) adalah sebesar 82-83% SnO2 pada temperatur 110 oC selama 2 jam.Kata kunci: kasiterit, mineral ikutan, asam klorida, reaktor berpengaduk, pelindian
STUDI PERBANDINGAN EFEK FOTOKATALISIS Fe2O3-TiO2 HASIL EKSTRAKSI ILMENIT BANGKA DAN P-25 DEGUSSA UNTUK APLIKASI PENGOLAHAN LIMBAH CAIR TPA CILOWONG[The Photocatalytic Effect of P-25 Degussa and Fe2O3-TiO2 Derived from Bangka- Indonesia Ilmenite Extraction for Waste Water Treatment of Leachate on the Landfill Cilowong] Latifa Hanum Lalasari; Akhmad Herman Yuwono; Firdiyono Firdiyono; Lia Andriyah; Elfi N; Sri Harjanto; Bambang Suharno
Metalurgi Vol 27, No 3 (2012): Metalurgi Vol.27 No.3 Desember 2012
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (643.211 KB) | DOI: 10.14203/metalurgi.v27i3.235

Abstract

The Effect of Voltage and Time In Synthesis Manganese Dioxide from Manganese Sulfate Precursor Eka Fitri Wulandari; Lia Andriyah; Soesaptri Oediyani; Latifa hanum Lalasari; Tri Arini; Nadia Chrisayu Natasha; Fariza Eka Yunita; Ariyo Suharyanto; Eko Sulistiyono
Metalurgi Vol 37, No 1 (2022): Metalurgi Vol. 37 No. 1 April 2022
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (582.192 KB) | DOI: 10.14203/metalurgi.v37i1.599

Abstract

The utilization of manganese dioxide (MnO2) as a cathode material for lithium-ion battery has attract many attentions because of their excellent electrochemical properties which have high theoretical storage capacity of 615 mAh/g. In this study, synthesis of MnO2 was carried out from manganese sulfate (MnSO4) precursor which is a pregnant leach solution from the leaching process of manganese ore from Trenggalek Regency. The electrolysis method has been used in this synthesis of MnO2 in an electrochemical cell consisting of two graphite electrodes with dimensions (16 x 5 x 0,3) cm. The purpose of this study is to determine the effect of voltage and time to particles amount of MnO2, to determine the phase and crystal structure of MnO2 and its morphological microstructure. The electrolysis process was carried out in 2000 ml of MnSO4 solution under constant stirring at 60oC with DC voltage varied by 2, 4, 6 and 8 volt and time varied by 4, 8, 12 and 16 hours. The precipitates formed at anode were separated, then the particles were dried at 110oC for 2 hours. The main contain of MnO2 were analyzed by X-Ray Fluorescence (XRF), the phase and crystal structure were evaluated by X-Ray Diffraction (XRD) and the morphological microstructure were captured by Scanning Electron Microscope (SEM). The results revealed that the highest particles amount of MnO2 is 31,63 grams which is electrolyzed at 8 volts for 16 hours. The highest purity of MnO2 is 89,23% which is electrolyzed at 2 volts for 16 hours. The particles produced were α-MnO2 with a tetragonal crystal system and nearly spherical in shape with size particles ranged from 136,01-202,48 and 144-352 nm.
Co-Authors Akhmad Herman Yuwono Ariyo Suharyanto Bambang Suharno Eka Fitri Wulandari Eko Sulistiyono Elfi N Fariza Eka Yunita Firdiyono Firdiyono Lia Andriyah Nadia Chrisayu Natasha Soesaptri Oediyani Sri Harjanto Tri Arini