PUTRI, AMANDA NABILA and Purwaningrum, Widia and Syarif, Nirwan (2025) OPTIMASI ADSORPSI Fe DENGAN RESPONSE SURFACE METHODOLOGY (RSM) MENGGUNAKAN KOMPOSIT CaO/Fe3O4 DAN APLIKASINYA PADA AIR ASAM TAMBANG (AAT) PT. BUKIT ASAM. Undergraduate thesis, Sriwijaya University.
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Abstract
This research utilizes bamboo clam shell waste as a CaO precursor that is composited with Fe3O4 for acid mine drainage treatment. Acid mine drainage that has Fe levels of more than 7 mg/L needs to be treated first to comply with the environmental quality standards of the Minister of Environment and Forestry Decree No. 5 of 2022. Based on the results of XRD, FTIR, and BET characterization, the CaO/Fe3O4 composite has been successfully synthesized. This research optimized the Fe adsorption process using Response Surface Methodology (RSM) with the Central Composite Design (CCD) model and its application to acid mine water at PT. Bukit Asam. The optimization process was carried out with variation of concentrations (10, 55, 100 mg/L), pH (1, 2.5, 4), and contact time (10, 35, 60 minutes). The optimization results showed the optimal Fe adsorption process at a concentration of 55 mg/L with a pH of 2.5 and a contact time of 35 minutes resulting in an efficiency of 99.67%. The optimum results obtained were applied to acid mine water and showed a decrease in Fe levels from 21.08 mg/L to 0.31 mg/L with an efficiency of 98%. The adsorption isotherm model of the CaO/Fe3O4 composite on Fe tends to follow the Langmuir model with an R2 value of 0.9711. The adsorption kinetics of CaO/Fe3O4 composite adsorption on Fe follows the second-order pseudo model with R2 value of 0.9997.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Adsorpsi Fe, CaO/Fe3O4, Response Surface Methodology (RSM) |
| Subjects: | Q Science > QD Chemistry > QD1-999 Chemistry Q Science > QD Chemistry > QD71-142 Analytical chemistry |
| Divisions: | 08-Faculty of Mathematics and Natural Science > 47201-Chemistry (S1) |
| Depositing User: | Amanda Nabila Putri |
| Date Deposited: | 23 Jul 2025 13:46 |
| Last Modified: | 23 Jul 2025 13:46 |
| URI: | http://repository.unsri.ac.id/id/eprint/180198 |
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