Skripsi

SINTESIS BENTONIT/ZnO-GO UNTUK ADSORPSI ZAT WARNA METILEN BIRU

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Methylene blue is a cationic dye. The reduction of methylene blue dye waste was carried out through an adsorption process. This study was conducted by activating bentonite and synthesizing bentonite/ZnO-GO as an adsorbent to remove methylene blue dye. The composite was synthesized using an ultrasonic method and its performance was evaluated based on variations in pH, concentration, adsorbent mass, and contact time. The synthesized materials were characterized using XRD, FTIR, SEM-EDS, and Raman spectroscopy on GO. XRD results showed characteristic peaks at 2θ values of 12.87°, 18.72°, and 61.95°, with the smallest crystallite size of 38.14 nm for the bentonite/ZnO-GO composite at a ratio of 3:1. The FTIR spectrum showed Si–O–Al functional groups of bentonite at 529 cm−1, C–O and C=C functional groups of GO at 1053 cm−1 and 1605 cm−1, and Zn–O functional groups at 821 cm−1. SEM analysis of the bentonite/ZnO-GO composite showed large agglomerates coated with fine fiber- like particles. EDS results showed an increase in C content from 5.3% to 11.2%, a decrease in O from 52.3% to 43.8%, Al from 7.4% to 2.4%, and Si from 33.1% to 9.1%, as well as the presence of S at 1.9% and Zn at 33.5%. Raman spectroscopy showed the G band at 1585 cm−1 and the D band at 1343 cm−1 as an indication of graphitic structural disorder. The pHpzc of bentonite/ZnO-GO was 7.124. The best conditions for methylene blue adsorption were obtained at pH 8, a concentration of 20 mg/L, an adsorbent mass of 25 mg, and a contact time of 30 min. The adsorption efficiencies were 98.37% for bentonite and 96.42% for the bentonite/ZnO/GO composite. Keywords: Methylene blue, Bentonite, Bentonite/ZnO-GO composite, Adsorption.

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Detail Information

Series Title

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Call Number

T1905152025

Publisher

Indralaya : Prodi Ilmu Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Sriwijaya., 2025

Collation

xvii, 85 hlm.; ilus.; 29 cm

Language

Indonesia

ISBN/ISSN

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Classification

660.284 235 07

Content Type

Text

Media Type

unmediated

Carrier Type

-

Edition

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Subject(s)

adsorpsi
Prodi Ilmu Kimia

Specific Detail Info

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Statement of Responsibility

KA

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