CD Skripsi

Optimasi Waktu Kontak Dan Kecepatan Pengadukan Adsorpsi Logam Cd(Ii) Menggunakan Adsorben Serbuk Kulit Kayu Akasia (Acacia Crassicarpa)

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Acacia crassicarpa bark has the potential to be used as an adsorbent in the form of powder due to its high cellulose content of approximately 50%. This research aims were to determine the optimum contact time, stirring speed, and adsorption kinetics model of Acacia crassicarpa bark powder for Cd(II) metal removal. The bark was prepared through washing, cutting, drying, grinding, and sieving processes to obtain powder with a particle size between 100 mesh and 200 mesh. The method used in this research is batch adsorption with variations in contact time (30, 50, 70, 90, and 100 minutes) and stirring speed (90, 100, 110, 120, and 130 rpm). Characterizations included iodine number testing based on SNI 06-3730-1995, FTIR and SEM-EDS analysis before and after adsorption, and Surface Area and Pore Size Analyzer analysis before adsorption. The concentration of Cd(II) metal before and after adsorption was measured using ICP-OES. The iodine number was 231.3133 mg/g. FTIR analysis revealed the presence of O‒H, C‒O, and O‒Cd functional groups. SEM-EDS analysis before adsorption showed a rough surface morphology with irregular pore distribution, open pores, and dominant elements of C, N, and O. After adsorption, the surface appeared smoother with pores filled with Cd(II) metal, as confirmed by the presence of Cd peaks in the EDS spectrum. Surface Area and Pore Size Analyzer analysis showed a specific surface area of 0.460 m²/g with a pore diameter ranging from 32.707 to 45.426 Å, which was classified as mesoporous. The results showed that the adsorption of Cd(II) metal by Acacia crassicarpa bark powder reached optimum conditions at a contact time of 70 minutes and a stirring speed of 120 rpm, with an adsorption efficiency of 96.93% and a capacity of 1.3613 mg/g. The adsorption kinetics followed a pseudo-second- order model with an R2 value of 0.9985 and a rate constant (k2) of 0.6615 g/mg/min, indicating that the adsorption mechanism occurred via chemisorption.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2103111499

Penerbit

Pekanbaru : Universitas Riau FMIPA Kimia., 2025

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2103111499

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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