Wulandari, Dwi Tina (2025) Sintesis Silika Berpori dari Limbah Geotermal Sebagai Adsorben Zat Pewarna Metilen Biru. Other thesis, Intitut Teknologi Sepuluh Nopember.
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Abstract
Abstrak— Limbah geotermal mengandung silika (SiO2) sebanyak 65-75% dalam pipa fluida panas bumi. Pada penelitian ini dilakukan sintesis silika berpori dari hasil pemurnian limbah geotermal menggunakan metode hidrotermal dengan variasi penambahan surfaktan Pluronik 123, serta digunakan sebagai material adsorben pada komposit beads silika berpori dengan alginat. Sampel yangperoleh dikarakterisasi dengan XRD, FTIR dan FESEM, serta digunakan Spektrofotometer UV-Vis untuk analisis konsentrasi metilen biru. Hasil analisis FT-IR menunjukkan bahwa semua variasi sampel hasil sintesis sesuai dengan spektra silika berpori, yaitu ditandai dengan munculnya pita serapan Si – O – Si dan gugus silanol (Si – OH) yang khas. Hasil analisis FESEM menunjukkan bahwa peningkatan dosis Pluronik 123 menghasilkan morfologi permukaan berupa batang dengan ukuran tidak seragam. Hasil uji adsoprsi menunjukkan bahwa keadaan setimbang terjadi pada waktu kontak selama 60 menit dengan persentase adsorpsi sebesar 60,44 % untuk beads silika berpori basah variasi 0,017 P123 dan 66,03 % untuk beads silika berpori kering variasi 0,017 P123.
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Geothermal waste contains silica (SiO2) as much as 65-75% in geothermal fluid pipes. In this study, porous silica was synthesized from the purification of geothermal waste using the hydrothermal method with variations in the addition of Pluronic 123 surfactant, and used as an adsorbent material in porous silica beads composite with alginate. The obtained samples were characterized by XRD, FTIR and FESEM, and UV-Vis spectrophotometer was used for methylene blue concentration analysis. The results of FT-IR analysis show that all variations of the synthesized samples are in accordance with the spectra of porous silica, which is characterized by the appearance of typical Si-O-Si absorption bands and silanol groups (Si- OH). The results of FESEM analysis show that increasing the dose of Pluronic 123 produces a surface morphology in the form of rods with non-uniform sizes. The adsorption test results showed that the equilibrium state occurred at a contact time of 60 minutes with an adsorption percentage of 60,44% for wet porous silica beads of 0.017 P123 variation and 66,03% for dry porous silica beads of 0.017 P123 variation.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Limbah geotermal; Silika Berpori; Alginat; Adsorpsi; Metilen Biru; Geothermal waste, Mesoporous silica, Alginate, Adsorption, Methylene Blue. |
| Subjects: | Q Science Q Science > QD Chemistry Q Science > QD Chemistry > QD117 Absorption |
| Divisions: | Faculty of Architecture, Design, and Planning > Architecture > 23001-(S3) PhD Thesis |
| Depositing User: | Dwi Tina Wulandari |
| Date Deposited: | 06 Aug 2025 06:24 |
| Last Modified: | 06 Aug 2025 06:24 |
| URI: | http://repository.its.ac.id/id/eprint/127772 |
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