CD Skripsi

Model Isoterm Dan Termodinamika Adsorpsi Zat Warna Rhodamin B Oleh Serbuk Buah Jabon Putih (Anthocephalus Cadamba Miq.) Dikombinasi Asam Humat

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The white jabon fruit (Anthocephalus cadamba Miq.) has potential to be used as a biosorbent for removing various synthetic dye pollutants, including Rhodamine B. This fruit was chosen because it contains a high amount of cellulose, which supports the adsorption process. The adsorption ability is expected to be improved through chemical activation using NaOH and further enhanced by combining with humic acid from peat water, which may increase surface area and the number of active sites. This study aims to determine the adsorption efficiency and capacity of white jabon fruit biosorbent toward Rhodamine B under optimum conditions, as well as to evaluate the adsorption isotherm model and thermodynamic properties of the process. The method used in this research was batch adsorption of Rhodamine B. Optimization was carried out by varying adsorbate concentrations (25, 30, 35 and 40 ppm) and temperatures (30, 40 and 50°C). The surface morphology of the biosorbent was analyzed using SEM-EDS, while the pore size was measured using ImageJ software. Functional groups were identified through FTIR analysis, and adsorption capacity and efficiency were determined using a UV-Vis spectrophotometer. The methylene blue adsorption test was conducted based on the Indonesian Standard SNI 06-3730-1995. The results showed that the biosorbent did not meet the standard adsorption capacity according to SNI. SEM-EDS analysis showed that the activated biosorbent contained elements such as C, O, Na, Ca and
K. The surface area of the biosorbent after activation was 1.115 m²/g, as analyzed by BET. The optimum adsorption condition was found at 35 ppm concentration and 50°C temperature, with adsorption efficiency of 99.1213% and adsorption capacity of 1.7851 mg/g. The adsorption isotherm followed the Temkin model (R² = 0.5239), indicating a chemical adsorption mechanism. Thermodynamic analysis showed that the adsorption process was spontaneous (negative ΔG), endothermic (positive ΔH) and increased in randomness (positive ΔS).

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2103110606

Penerbit

Pekanbaru : Universitas Riau FMIPA Kimia., 2025

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2103110606

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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