Devitasari, Lucia Adelina (2025) Efisiensi Fly Ash dan Tongkol Jagung sebagai Adsorben Alternatif untuk Menurunkan Fe2+ dan Mn2+ pada Air Tanah. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
The decline in groundwater quality in densely populated and industrial areas is caused by elevated concentrations of Fe²⁺ and Mn²⁺, which pose potential health risks. Adsorption was selected as a simple and efficient treatment method, utilizing fly ash and corncob waste as adsorbents. This study aims to analyze metal removal efficiency, characterize active functional groups, and evaluate adsorption kinetics based on the Thomas and Yoon–Nelson models. The adsorption process was conducted continuously with variations in adsorbent height and sampling time, using adsorbents activated with 40% H₃PO₄. The results showed that under optimal conditions, fly ash removed 99.7% of Fe²⁺, reducing its concentration from 1.305 mg/L to 0.004 mg/L, and 89.2% of Mn²⁺, from 2.96 mg/L to 0.321 mg/L. Meanwhile, corncob adsorbent achieved 99.2% Fe²⁺ removal to 0.010 mg/L and 87.7% Mn²⁺ removal to 0.364 mg/L. Increasing the adsorbent height up to 40 cm enhanced removal efficiency due to the greater number of active sites and surface area. Fly ash reached saturation at 105 minutes, while corncob reached it at 90 minutes. FTIR analysis revealed the involvement of –OH, Si–O–Si, C=O, and COO⁻ functional groups in the adsorption process. The Thomas and Yoon–Nelson kinetic models indicated that adsorption rates increased with column height, with the highest KT and KYN values recorded at 0.318 mL/mg·min and 0.041 min⁻¹, respectively, for Fe²⁺ removal. Overall, the findings demonstrate that both adsorbents are effective for reducing Fe²⁺ and Mn²⁺ concentrations in continuous adsorption systems.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TD Environmental technology. Sanitary engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Environmental Engineering | ||||||||
| Depositing User: | Lucia Adelina Devitasari | ||||||||
| Date Deposited: | 03 Dec 2025 05:06 | ||||||||
| Last Modified: | 03 Dec 2025 05:06 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/47531 |
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Efisiensi Fly Ash dan Tongkol Jagung sebagai Adsorben Alternatif untuk Menurunkan Fe2+ dan Mn2+ pada Air Tanah. (deposited UNSPECIFIED)
- Efisiensi Fly Ash dan Tongkol Jagung sebagai Adsorben Alternatif untuk Menurunkan Fe2+ dan Mn2+ pada Air Tanah. (deposited 03 Dec 2025 05:06) [Currently Displayed]
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