CD Skripsi

Optimasi Konsentrasi Adsorbat Dan Suhu Larutan Adsorpsi Logam Pb(Ii) Menggunakan Adsorben Serbuk Kulit Kayu Akasia (Acacia Crassicarpa)

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Acacia crassicarpa bark is one of the abundant biomass in Riau Province and is used as raw material for adsorbent in powder form in this study to adsorb Pb(II) ions from aqueous solutions. Acacia crassicarpa bark samples were obtained from Industrial Plantation Forests in Pelalawan Regency, Riau Province. The samples were washed with distilled water, dried in the sun for ±7 days, ground, sieved through 100 and retained 200 mesh, then dried in an oven at a temperature of 100 ± 5 °C for ± 48 hours and stored in zipper plastic. This study aims to determine the optimum adsorbate concentration and solution temperature for Pb(II) adsorption by Acacia crassicarpa bark powder. The study was conducted by analyzing the characteristics of functional groups using FTIR, surface morphology and elemental composition using SEM-EDX, and surface area using SAA. The adsorption process was carried out in batches with variations in concentration of 60; 80; 100; 120 and 150 ppm and temperatures of 25; 35; 45 and 55 °C. Adsorption isotherm studies were carried out using the Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, and Fowler-Guggenheim models. The optimum concentration was obtained at a concentration of 100 ppm with an adsorption efficiency of 82.51% and an adsorption capacity of 4.8397 mg/g, while the best temperature was obtained at 55°C with an adsorption efficiency of 91.86% and an adsorption capacity of 5.6589 mg/g. FTIR characterization showed the presence of O-H, C=O, C-O, O-Ca, O-Al, O-Mn, O-Pb, and O-Mg groups, while SEM results showed a rough porous surface before adsorption and a surface covered with a thin layer after adsorption. EDX analysis showed high C and O element intensities in the adsorbent. SAA analysis shows that the adsorbent belongs to type IV isotherm which is dominated by mesopores. The most suitable adsorption isotherm model in this study is the Temkin isotherm with a coefficient of determination of 0.9508 which indicates that adsorption occurs chemically on the heterogeneous adsorbent surface. Thermodynamic parameters indicate that the adsorption process is endothermic (ΔH = +21.9 kJ/mol) system randomness decreases

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2103124213

Penerbit

Pekanbaru : Universitas Riau FMIPA Kimia., 2025

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2103124213

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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