Pemurnian Mangan Oksida dengan Metode Pengendapan Selektif Menggunakan Karbon

Authors

  • Ihsan Alamsah Laboratorium Fisika Material, Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Andalas
  • Dwi Puryanti Laboratorium Fisika Material, Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Andalas

DOI:

https://doi.org/10.25077/jfu.8.4.348-354.2019

Abstract

Penelitian pemurnian mangan oksida dari bijih mangan Nagari Aie Ramo, Kecamatan Kamang, Kabupaten Sijunjungdilakukan dengan mengunakan metode pengendapan selektif dan adsorbsi. Biji mangan diekstraksi dengan asam sulfat kemudian direduksi dengan asam oksalat dalam suasana asam dan diendapkan dalam larutan NaOH menggunakan media adsorbsi karbon.Karbon yang digunakan berasal dari cangkang kelapa sawit (CKS), cangkang biji karet (CBK), cangkang buah ketaping (CKP), dan tandan kosong kelapa sawit (TKS). Hasil penelitian menunjukkan bahwa karbon cangkang kelapa sawit merupakan karbon yang paling tinggi persen adsorbsinya yaitu 94,225 % dibandingkan dengan sumber karbon lainnya. Analisis Atomic Adsorbtion Spectroscopy(AAS) menunjukkan kadar mangan meningkat setelah proses pemurnian yaitu dari 13,6123 ppm hingga 21,8867 ppm untuk karbon cangkang kelapa sawit. Kadar mangan meningkat setelah proses pengendapan selektif dan adsorbsi. Kadar pengotor yang terkandung dalam bijih mangan seperti Fe, Al, Si, K, Ba, P, Mg, Ca dan Ti dianalisis menggunakan X-Ray Fluoresense (XRF).Proses pengendapan selektif dapat menghilangkan pengotor Fe sekitar 98%. Proses pemurnian dengan metode adsorbsi dapat menghilangkan pengotor sebanyak 98 % Fe.Hasil karakterisasi menggunakan X-Ray Difraktion (XRD) untuk MnO2 murni menunjukkan bahwa sistem kristal yang dihasilkan adalah tetragonal dengan puncak tertinggi pada sudut 2θ = 25,3591o dengan indeks miller (111) dan ukuran kristal MnO2 diperoleh sebesar 53,08 nm.

Kata Kunci : Bijih Mangan, Mangan Oksida, Pengendapan Selektif, Adsorbsi, Karbon

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Published

2019-11-26

How to Cite

Alamsah, I., & Puryanti, D. (2019). Pemurnian Mangan Oksida dengan Metode Pengendapan Selektif Menggunakan Karbon. Jurnal Fisika Unand, 8(4), 348–354. https://doi.org/10.25077/jfu.8.4.348-354.2019

Issue

Vol. 8 No. 4 (2019)

Section

Articles

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Copyright (c) 2019 Ihsan Alamsah, Dwi Puryanti

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