SUBROTO, SUBROTO and Hariani, Poedji Loekitowati and Ibrahim, Eddy and Said, Muhammad (2025) SINTESIS KOMPOSIT KARBON AKTIF/MnFe2O4, KARBON AKTIF/Fe3O4 DAN KARBON AKTIF/NiFe2O4 UNTUK PENGOLAHAN AIR SUNGAI LEMATANG SEBAGAI BAHAN BAKU AIR MINUM. Doctoral thesis, Sriwijaya University.
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Abstract
River water pollution caused by industrial and domestic waste poses a significant challenge in drinking water treatment. The Lematang River has experienced a decline in water quality due to high turbidity levels, Total Suspended Solids (TSS), and the presence of heavy metal ions such as Fe and Mn. This study aims to synthesize activated carbon/MnFe₂O₄, activated carbon/Fe₃O₄, and activated carbon/NiFe₂O₄ composites to enhance the efficiency of river water treatment. The composites were synthesized using the coprecipitation method, yielding blackish-brown magnetic powders with saturation magnetization values of 18.56, 77.62, and 21.12 emu/g, respectively. Characterization using FTIR confirmed the presence of Mn-O, Fe-O, and Ni-O functional groups, while SEM-EDS analysis revealed oxide compositions of MnO (18.26%), FeO (37.90%), and NiO (4%). The specific surface areas, as determined by BET analysis, were 265.44 m²/g for KA-MnFe₂O₄, 155.02 m²/g for KA-Fe₃O₄, and 293.99 m²/g for KA-NiFe₂O₄. The crystallite sizes obtained through XRD analysis were 19.53 nm, 19.22 nm, and 29.07 nm, respectively. The optimal conditions for TSS reduction varied depending on the composite type, with dosage ranging from 0.02 to 0.06 g, contact time between 60 and 180 minutes, and stirring speed between 200 and 350 rpm. The results indicated that activated carbon/NiFe₂O₄ composite exhibited the highest effectiveness in reducing turbidity (87.01%), TSS (210 mg/L), pH (7.3), and Fe ions (96.08%) compared to activated carbon/MnFe₂O₄ composite, activated carbon/Fe₃O₄ composite, unmodified activated carbon, and alum. The adsorption kinetics followed a pseudo-second-order model. Composite regeneration through washing, heating, and reactivation improved adsorption efficiency, reduced costs, and extended the composite’s lifespan. The modification of activated carbon with magnetic materials was proven to enhance river water treatment efficiency. Therefore, activated carbon/NiFe₂O₄ is recommended as the most effective adsorbent for this application. Further research is suggested to optimize the regeneration process to improve the effectiveness of Lematang River water treatment in accordance with quality standards. Additionally, pilot-scale or field trials should be conducted to assess the adsorbent’s effectiveness under actual conditions in the Lematang River.
| Item Type: | Thesis (Doctoral) |
|---|---|
| Uncontrolled Keywords: | Karbon aktif, komposit magnetik, adsorpsi, pengolahan air sungai, kualitas air. |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences > GE1-350 Environmental sciences |
| Divisions: | 11-Postgraduates Study > 95029-Environmental Science (S3) |
| Depositing User: | Subroto Subroto |
| Date Deposited: | 26 Mar 2025 03:12 |
| Last Modified: | 26 Mar 2025 03:12 |
| URI: | http://repository.unsri.ac.id/id/eprint/170111 |
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