KARBONISASI HIDROTERMAL KULIT BUAH DUKU (Lansium domesticum) DAN AKTIVASINYA MENGGUNAKAN NaOH SEBAGAI ADSORBEN ZAT WARNA DIRECT ORANYE DAN MALASIT HIJAU

ARDIANSYAH, REDO and Lesbani, Aldes and Hidayati, Nurlisa (2021) KARBONISASI HIDROTERMAL KULIT BUAH DUKU (Lansium domesticum) DAN AKTIVASINYA MENGGUNAKAN NaOH SEBAGAI ADSORBEN ZAT WARNA DIRECT ORANYE DAN MALASIT HIJAU. Undergraduate thesis, Sriwijaya University.

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Abstract

In this study, the hydrochar preparation of the duku peel biomass (Lansium domesticum) was carried out using the hydrothermal carbonization method and its activation using NaOH at various treatments of carbonization time and temperature. Materials that have gone through the preparation process are characterized using Fourier Transform Infra Red (FT-IR), X-Ray Diffraction (XRD), Brunauer Emmet Teller (BET) and Scanning Electron Microscope (SEM) analysis. In the process of biomass material through various variations in time and temperature of carbonization and actvation, the best material was obtained the treatment carbonization time and temperature for 12 hours at the temperature of 200°C. The results of FT-IR analysis show that vibrational peaks in the material which indicate the presence of functional groups like –OH, –CH, =CH, C=O, C=C aromatic and aliphatic on materials. XRD analysis of biomass showed a diffraction peak appear on 15.7° and 22.79°, but decrease at the diffraction peak of 15.5° after carbonization and activation treatment. BET analysis showed an increase in the surface area and the results carbonization of biomass at 200°C from 12.343 m2/g to 22.635 m2/g. Materials that have been characterized are used as adsorbents in the adsorption process of direct orange and malachite green dyes. SEM analysis showed that surface of the biomass material has a surface morphology that tends to clump in the same phase or commonly called aggegation, after going through carbonization treatment the material tends to have heterogeneous morphology with irregular shapes, while after going through the activation treatment the material tend to have needle-shaped morphology. The adsorption study of congo red and direct orange onto adsorbent was investigated at several conditions, such as pH, adsorption time, temperature, initial concentration, desorption and regeneration adsorbent as well as dye selectivity testing. The direct orange dye adsorption process was optimum at pH 2, while the malachite green dye was optimum at pH 6. The adsorption kinetics model of the two dyes followed the pseudo second order kinetics model. The direct orange dye adsorption isotherm model follow the Freundlich isotherm model while the malachite green dye follow the langmuir isotherm model for biomass and hydrochar adsorbents with ΔH values reaching from 6,412 kJ/mol to 34,633 kJ/mol wich can indicated the adsorption classified as physical adsorption. The desorption process showed that ethanol as a suitable solvent for desorbing direct orange and malachite green dyes which are bound to each adsorbent used. Carbonization and activation treatments further increase the regeneration ability for the adsorbent. The adsorption selectivity test showed that malachite green dye was more easily absorbed than the direct orange dye. Characterization study for adsorben after adsorption procces using XRD analysis showed an increase the diffraction peak of 22.3° and experienced a slight shift in the diffraction peak of 16.6° which indicated an chemical interaction that occurred during the adsorption process.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Biomassa, hidrochar, karbonisasi hidrotermal, adsorpsi, direct oranye, malasit hijau.
Subjects: Q Science > QD Chemistry > QD146-197 Inorganic chemistry
Divisions: 08-Faculty of Mathematics and Natural Science > 47201-Chemistry (S1)
Depositing User: Users 11463 not found.
Date Deposited: 01 Apr 2021 03:15
Last Modified: 01 Apr 2021 03:15
URI: http://repository.unsri.ac.id/id/eprint/44627

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