CD Skripsi

Optimasi Waktu Kontak, Kecepatan Pengadukan Dan Suhu Pada Adsorpsi Zat Warna Rhodamine B Oleh Serbuk Kulit Kayu Akasia (Acacia Crassicarpa)

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Acacia bark powder (Acacia crassicarpa) can be used as an adsorbent because it contains cellulose, hemicellulose and lignin which play an active role in the adsorption process. This study aims to determine the contact time, stirring speed and optimum temperature of Rhodamine B dye adsorption by acacia bark powder (Acacia crassicarpa). The method used was adsorption method using batch system. Adsorption of Rhodamine B dye using variations of contact time (30, 40, 50, 60 and 70 minutes), stirring speed (100, 150, 200, 250 and 300 rpm) and temperature (30°, 40° and 50°C). Adsorbent characterisation was observed using SEM-EDS, FTIR and BET. UV-Vis spectrophotometer was used to determine the adsorbance of Rhodamine B in the adsorption process. The adsorption kinetics model was determined based on first-order pseudo, second-order pseudo and intraparticle diffusion kinetics models. The thermodynamic model was determined based on ∆G°, ∆H° and ∆S°. SEM results show the morphology of the adsorbent surface before adsorption has a rough surface and there are voids while after adsorption the adsorbent surface is smoother and the voids are closed and EDS results show acacia bark powder is dominated by carbon (C) and oxygen (O) elements. FTIR results showed the presence of N-H, O-H, C-H, C=O, C=C aromatic and C-O groups. BET results obtained surface area, pore volume and pore diameter of 0.460 m2/g, 4.361×10-3 cc/g and 379.008 Å respectively. The results showed the optimum contact time of 50 minutes, stirring speed of 200 rpm and increasing temperature increased the efficiency and capacity of adsorption, obtained an adsorption efficiency of 99.04% and a capacity of 3.9326 mg/g. Second-order pseudo kinetics model with R2=0.9999 and rate constant 2.2527 g/mg min. The analysis of thermodynamic parameters of Rhodamine B dye adsorption showed that the adsorption was spontaneous (∆G° is negative), endothermic (∆H° is positive) and particle irregularity at high temperature (∆S° is positive).

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2103110584

Penerbit

Pekanbaru : Universitas Riau FMIPA Kimia., 2025

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2103110584

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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