CD Skripsi

Sintesis Komposit Mnox/Abu Cangkang Kelapa Sawit Dengan Variasi Waktu Kalsinasi Dan Uji Aktivitas Katalitik Untuk Degradasi Metilen Biru

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Industrial processes are one of the causes of environmental pollution which can be seen from the waste produced. A dye pollutant that is difficult to decomposes is methylene blue (MB). Manganese oxides minerals are ubiquitous in the environmental settings, strong oxidant and play an important role to transform unwanted chemicals into environmentally smaller compounds. Manganese oxides can be synthesized by sol-gel method, which highly depend on the ratio mol and concentration of reacting precursors and the presence of other compounds. The objective of this research is to investigate the effect of calcination time on the physicochemical, crystal structure and catalytic activity of MnOx/OPFA for the degradation of MB via activation of H202. The synthesis of MnOx/OPFA was permoemed by reacting KMnO4 and glucose to form gel, which is the added with the activated Oil Palm Fly Ash (OPFA). The crystal structure of the composite was determined by XRD, whereas IR and Raman spectroscopy was used to monitor the lattice vibration in the composite. The surface area, average oxidation state (AOS) of Mn and the zero charge of the composite were determined by BET surface area, back-titration method and pHzpc determination, respectively . The XRD results indicated the presence of quartz from the support and MnOx phase; manganosite, crypyomelan, birnessite, hausmaanite. The IR spectroscopy confirmed the presence of lattice vibration of Mn-O in the 1558 cm-1, 1653 cm-1, 2163 cm-1 and lattice vibration of Si-O-Si in the 1000-1600 cm-1. The Raman Spectroscopy also showed the lattice vibration of Mn-O in the Raman shift of 638.18 cm-1 while the Raman shift of Si-O was found in the 127.89 – 464.92 cm-1. The BET surface area of the pristine MnOx was 11.223 m2/g whereas in the composite MnOx/OPFA after 2 hour calcination time was 278.541 m2/g. The average oxidation state of Mn in the composite was in the range of 3.44-3.60 and the surface zero charge in the composites is in the range of pH 2.2-7.5. The catalytic activity MnOx/OPFA for the degradation of MB was varied depending on the condition of catalytic test which 56.45% for 1 hour 77.71%, for 1.5 hour 90.56% , for 2 hour 89.41%, for 2.5 hour 88.20% and 86.19% for 3 hour of calcination time, respectively. MnOx/OPFA which was able to degrade MB by 90.56% in 120 minutes. Catalyst weight is the most dominant factor in MB degradation.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

1803111714

Penerbit

Pekanbaru : Universitas Riau – FMIPA - Kimia., 2023

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

1803111714

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

Mutia

Versi lain/terkait

Lampiran Berkas

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