CD Skripsi

Optimalisasi degradasi metilen biru menggunakan komposit mno/arang cangkang kelapa sawit yang disintesis dengan metode sol-gel variasi waktu kalsinasi

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Water pollution caused by synthetic dye waste such as methylene blue (MB) has become a serious environmental issue due to the stable, toxic, and persistent nature of MB. To address this problem, research was conducted with the aim of optimizing the degradation process of methylene blue using a MnO/ACKS composite. This composite was synthesized via a sol-gel method and calcined for durations ranging from 1-3 hours. The study involved several tests, including MB degradation experiments by varying the volume of H₂O₂ (0, 5, 10, and 20 mL), catalyst mass (0,
25, 50, and 75 mg), and initial MB concentrations (12.5, 25, and 50 ppm). The reaction was carried out for 120 minutes and monitored using a UV-Vis spectrophotometer at a wavelength of 662 nm to determine degradation efficiency. Additional characterization was performed using FTIR to analyze changes in functional groups of MB before and after degradation. The results showed that the most optimal degradation condition was achieved with a calcination time of 1.5 hours, yielding a degradation efficiency of 99.45% after 120 minutes. The best operational conditions were found at an H₂O₂ volume of 10 mL, catalyst mass of 50 mg, and an initial MB concentration of 12.5 ppm. H₂O₂ played a crucial role in generating hydroxyl radicals (•OH), which are highly reactive toward organic compounds; however, excessive H₂O₂ reduced efficiency by acting as a radical scavenger. Similarly, excessive catalyst mass decreased efficiency due to particle agglomeration. Furthermore, high MB concentrations negatively affected degradation performance. FTIR analysis revealed significant changes in the MB spectra before and after degradation. Prior to degradation, the MB spectrum showed characteristic absorption bands of aromatic and substituted amine groups. After the degradation process, the intensity of several bands weakened or disappeared, indicating that the chemical structure of methylene blue had been broken down. Overall, this study successfully demonstrated that the MnO/ACKS composite has high potential as an effective and environmentally friendly catalyst for the treatment of industrial wastewater containing synthetic dyes.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2103124214

Penerbit

Pekanbaru : Universitas Riau FMIPA Kimia., 2025

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2103124214

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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