CD Tesis

Degradasi Metilen Biru Dengan Katalis Mangan Oksida Tipe Birnessite Disintesis Dengan Metode Refluk Dari Asam Oksalat Dan KMnO4

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The objectives of the research are to synthesize manganese oxide catalysts by using KMnO4 and H2C2O4 via reflux method with and without the calcination and to investigate the performance of the catalysts for the degradation of methylene blue. The products, birnessite-type octahedral layer manganese oxides have been succesfully synthesized with different reflux times. The precipitate solid products were calcined up to 600 oC and referred to as the CC catalysts, whereas the products without calcination were denoted as the CNC catalysts. The solid CC and CNC catalysts were then characterized by XRD, SEM, AAS and their Avarage Oxidation State (Mn AOS), zero point charge pH (pHzpc) and particle sizes were also determined. The catalytic activities of birnessite catalysts were tested for the degradation of methylene blue (MB) dye.
The results of XRD indicated the CNC catalysts showed the wide peaks with low intensities, indicating the poor crystallinity of birnessite whereas the CC catalysts generated much higher crystalline birnessite. The morphology of CNC shows irregular aggregates and that of CC catalysts displayed the nanowires on their surface. The Mn AOS data showed that CNC catalysts had lower the AOS values than those of CC catalysts. The Mn AOS data for the catalysts before degradation process have higher the AOS values (3.0-3.9) than those of after degradation (2.0-2.75). The catalysts have zero point charge pH in the range 4.4-5.7 with the particle sizes 2.02-14,02 nm and the K/Mn ratios of 0.64-0.75. The catalytic activities of birnessite catalysts were tested for the degradation of methylene blue (MB) dye with H2O2 as an oxidant. The maximum of dye degradation was 97.53% on CNC 1 catalyst and followed the second-order reaction kinetics with reaction rate constant value 0.0109 mgL-1 minute -1.

Keywords: birnessite, degradation, manganese oxide, reflux method, methylene blue

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

10 05. 219 (0002)

Penerbit

Pekanbaru : Universitas Riau – Pascasarjana – Tesis Kimia., 2019

Deskripsi Fisik

xiv, 110 hlm.; ill.; 29 cm

Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

10 05. 219 (0002)

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

PASCASARJANA (MAGISTER) KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

FATAH

Versi lain/terkait

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