Skripsi

STUDI ADSORPSI PEWARNA CONGO RED DAN METHYLENE BLUE MENGGUNAKAN DRIED KULIT PETAI DAN HIDROCHAR KULIT PETAI

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Water pollution caused by synthetic dyes, such as Methylene Blue (MB) and Congo Red (CR), has become a serious environmental issue, necessitating the development of alternative adsorbents that are environmentally friendly and cost-effective. This study aims to investigate the characteristics, adsorption mechanisms, and adsorption performance of petai biomass waste–based adsorbents, namely Dried Petai (D-Petai) and Petai Hidrochar (H-Petai), for the removal of MB and CR dyes. D-Petai was prepared through oven-drying, while H-Petai was synthesized via the Hydrothermal Carbonization (HTC) method at 180 °C for 18 h. The adsorbents were characterized using Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy–Energy Dispersive X-ray spectroscopy (SEM–EDX), and Brunauer–Emmett–Teller (BET) analysis to identify functional groups, surface morphology, elemental composition, and specific surface area. FTIR results revealed the presence of O–H, C–O, and C=C functional groups on both adsorbents. SEM–EDX analysis indicated that H-Petai exhibited a more porous surface structure and higher carbon content compared to D-Petai, which is consistent with BET results showing an increased specific surface area for H-Petai. Adsorption kinetic studies demonstrated that the adsorption of MB and CR onto both adsorbents followed the Pseudo-First-Order (PFO) model. Isotherm analysis revealed that adsorption onto H-Petai conformed to the Langmuir model, whereas adsorption onto D-Petai was better described by the Freundlich model. Thermodynamic studies indicated that the adsorption process was endothermic. Furthermore, pH studies revealed the existence of an optimum pH that significantly influenced adsorption capacity, with adsorption mechanisms predominantly governed by hydrogen bonding and π–π interactions between the adsorbents and dye molecules. These findings demonstrate that H-Petai has a higher potential as an effective adsorbent for dye wastewater treatment compared to D-Petai.

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Detail Information

Series Title

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Call Number

T1910272025

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

628.507

Content Type

Text

Media Type

-

Carrier Type

-

Edition

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Subject(s)

adsorpsi
Prodi Pendidikan Kimia

Specific Detail Info

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Statement of Responsibility

TUTI

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