CD Tesis

Transformasi Katalis Birnessite Menjadi Cryptomelane Melalui Metode Pengendapan Untuk Degradasi Metilen Biru

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The birnessite-type manganese oxide catalyst was synthesized by using the precipitation method by mixing reactants between KMnO4 and glucose with mole ratios of 3:1 and 2:3. The mixing reaction was carried out through three mixing methods, A (the KMnO4 solution was added dropwise to the glucose solution), B (the glucose solution was added dropwise to the KMnO4 solution), and the C method (the glucose solution and the KMnO4 solution was mixed simultaneously). Calcination at 600°C for 4 hours transformed birnessite into cryptomelane (method C) as well as a cryptomelane-bixbyte mixture (method A & B). The catalyst characterization was carried out using X-Ray Diffraction (XRD), Energy Dispersive X-ray Spectroscopy (EDX), Gas Surface Analyzer (GSA), Atomic Absorption Spectrophotometer (AAS), determination of the average oxidation state of manganese (AOS) and pH zero point charge (pHzpc). The characterization results showed that the cryptomelane catalyst and cryptomelane-bixbyte mixture had higher crystallinity, low crystal size and surface area, and a higher K/Mn ratio and AOS and pHzpc values compared to birnessite catalysts. The catalytic activity of the manganese oxide catalyst was used for the degradation of methylene blue by using hydrogen peroxide (H2O2) as an oxidant. The birnessite-type manganese oxide catalyst can degrade methylene blue until >90%, whereas cryptomelane catalyst or cryptomelane-bixbyte mixture just ≤80%.
Keywords: Birnessite, presipitation method, cryptomelane, bixbyte, degradation and methylene blue.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

10 05. 220 (0006)

Penerbit

Pekanbaru : Universitas Riau – Pascasarjana – Tesis Kimia., 2020

Deskripsi Fisik

xiii, 79 hlm.; ill.; 29 cm

Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

10 05. 220 (0006)

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

FATAH

Versi lain/terkait

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