CD Skripsi

Optimasi Waktu Kontak Dan Kecepatan Pengadukan Dalam Adsorpsi Zat Warna Rhodamine B Menggunakan Arang Tongkol Jagung Manis Teraktivasi Naoh

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Sweetcorn cob activated carbon (Zea mays saccharata Sturt.) has shown potential as an adsorbent due to its large surface area and abundant active sites, making it effective in adsorbing the dye Rhodamine B. The adsorption capability of sweetcorn cob carbon was enhanced through activation using sodium hydroxide (NaOH). This NaOH activation serves to break the bonds between lignin and cellulose, thereby increasing the surface area and promoting the formation of activated carbon. The objective of this study was to determine the adsorption efficiency and capacity, as well as to identify the appropriate kinetic adsorption model. The adsorption process was carried out in a batch system with variations in contact time (30, 45, 60, and 75 minutes) and stirring speed (150, 200, 250, 300, 350, and 400 rpm). Characterization of sweetcorn cob activated carbon followed SNI No. 06-3730-1995, including analysis of ash content, moisture content, and adsorption capacity toward Methylene Blue. Functional groups were analyzed using FTIR, while surface morphology and elemental composition were examined using SEM-EDS. The adsorption of Rhodamine B was monitored using a UV-Vis spectrophotometer. The results indicated that the optimum contact time was 75 minutes, with an adsorption efficiency of 97.04% and adsorption capacity of 2.52 mg/g. The best stirring speed was found to be 350 rpm, resulting in an adsorption efficiency of 98.48% and capacity of 2.56 mg/g. The most suitable kinetic model was identified as the pseudo-second-order kinetic model, with a coefficient of determination (R²) of 0.9920 and a rate constant (k₂) of 0.1615 g/mg min. Functional groups identified before and after activation included O–H, C=O, C–O and C=C. SEM-EDS analysis showed that the dominant elements before and after activation were C, O, and K. Based on statistical analysis, contact time and stirring speed did significantly affect the adsorption process, as indicated by a significant value (< 0.05) in the One Way ANOVA statistical test.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2103135508

Penerbit

Pekanbaru : Universitas Riau FMIPA Kimia., 2025

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2103135508

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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