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PREPARASI DAN UJI MEKANISME ADSORPSI BERBASIS BIOMASSA Azolla microhpylla UNTUK PENYISIHAN ZAT WARNA CONGO RED DAN METHYLENE BLUE

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Water pollution caused by synthetic dyes, such as Congo red (CR) and Methylene blue (MB), which are difficult to degrade, requires effective treatment methods. Adsorption is selected as an alternative due to its low cost and simplicity. Adsorption is a process in which molecules, ions, or atoms adhere to a surface. This study aims to evaluate the potential of Azolla microphylla (AM) biomass as an environmentally friendly adsorbent for the adsorption of CR and MB, as well as to investigate the adsorption mechanisms involved. AM was prepared using two methods, namely drying (D-AM) and hydrothermal treatment (H-AM). SEM–EDX characterization revealed that H-AM exhibited a larger surface area and higher porosity compared to D-AM. This result was supported by BET analysis, which showed specific surface areas of 10.341 m²/g for H-AM and 1.202 m²/g for D-AM. FTIR analysis identified the presence of –OH, C=O/COO⁻, C=C aromatic, C–N, and S=O functional groups, and the shifts in absorption bands indicated the involvement of hydrogen bonding and electrostatic interactions as the main adsorption mechanisms. Isotherm and kinetic studies showed that the adsorption of CR and MB by both D-AM and H-AM followed the Freundlich isotherm model and pseudo-first-order kinetic model. Thermodynamic analysis indicated that the adsorption process was endothermic and spontaneous, with an optimum adsorption pH of 8. Regeneration studies demonstrated that the adsorbents could be reused for up to three cycles, with D-AM showing better stability for MB adsorption, while H- AM exhibited superior adsorption capacity for CR.

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Detail Information

Series Title

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Call Number

T1909122025

Publisher

Indralaya : Prodi Pendidikan Kimia, Fakultas Keguruan dan Ilmu Pendidikan Universitas Sriwijaya., 2025

Collation

ix, 86 hlm.; ilus.; 29 cm

Language

Indonesia

ISBN/ISSN

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Classification

628.168 07

Content Type

Text

Media Type

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Carrier Type

-

Edition

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Subject(s)

Prodi Pendidikan Kimia
Air limbah — Pengolahan

Specific Detail Info

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Statement of Responsibility

TUTI

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