Yuningsih, Nabila Eka (2022) Adsorpsi Logam Berat Pb(II) Menggunakan Silika Gel dari Limbah Botol Borosilikat: Optimasi Menggunakan Response Surface Methodology dan Desain Box-Behnken. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kandungan silika yang tinggi pada limbah botol kaca borosilikat mampu dijadikan bahan yang bermanfaat seperti silika gel. Ekstraksi silika gel sebagai adsorben dari limbah botol kaca borosilikat menggunakan metode fusi dan sol-gel dengan rasio SiO2: NaOH (2:6, 2:8, dan 2:10); ukuran partikel (44-53, 53-63, dan 63-74 ɥm); dan suhu (400, 600, dan 800°C). Optimasi dilakukan dengan desain Box-Behnken dan Response Surface Methodology (RSM). Hasil ekstraksi diperoleh kondisi optimum pada rasio SiO2: NaOH sebesar 2:6, ukuran partikel 63-74 ɥm, dan suhu 800°C dengan %SiO2 sebesar 75,632%. Hasil Uji XRD silika berbentuk amorf. Uji BET diperoleh luas permukaan dan diameter pori 297,083 m²/g dan 31,34 nm. Adsorpsi logam berat Pb(II) dilakukan dengan adsorben silika gel. Optimasi adsorpsi dalam penelitian ini menggunakan Response Surface Methodology (RSM) dengan parameter massa adsorben (15, 20, dan 25 mg), konsentrasi awal larutan (50, 100, dan 150 ppm), waktu kontak (10, 20, dan 30 menit) dan pH (4, 7, dan 10). Hasil adsorpsi diukur dengan AAS pada panjang gelombang 283,2 nm. Kondisi optimum adsorpsi diperoleh pada massa adsorben 20 mg, waktu kontak 30 menit, konsentrasi awal larutan 120 ppm dan pH 8 dengan
%removal sebesar 99,77%. Tipe isoterm yang sesuai adalah Langmuir dengan R2 sebesar 0,9345. Karakterisasi SEM-EDX menunjukkan bahwa logam Pb (II) telah teradsorp pada permukaan adsorben.
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The high silica content in borosilicate glass bottle waste can be used as useful materials such as silica gel. Extraction of silica gel as adsorbent from waste borosilicate glass bottles using fusion and sol-gel methods with ratio of SiO2: NaOH (2:6, 2:8; and 2:10); particle size (44-53, 53-63, and 63-74 ɥm); and temperature (400, 600, and 800 °C). Optimization is done by using Box-Behnken design and Response Surface Methodology (RSM). The extraction results obtained optimum conditions at the ratio of SiO2: NaOH of 2:6, particle size of 63-74 ɥm, and temperature of 800°C with %SiO2 of 75.632%. XRD test results of amorphous
silica. The BET test obtained surface area and pore diameter of 297.083 m²/g and 31.34 nm. Pb(II) heavy metal adsorption was carried out with silica gel as adsorbent. Optimization of adsorption in this study using Response Surface Methodology (RSM) with adsorbent mass parameters (15, 20, and 25 mg), initial concentration of solution (50, 100, and 150 ppm), contact time (10, 20, and 30 minutes) and pH (4, 7, and 10). The adsorption results were measured by AAS at a wavelength of 283.2 nm. The optimum adsorption conditions were obtained at the adsorbent mass of 20 mg, contact time of 30 minutes, initial concentration of the solution 120 ppm and pH 7 with % removal of 99.77%. The appropriate type of
isotherm is Langmuir with R2 of 0.9345. SEM-EDX characterization shows that Pb(II) metal has been adsorbed on the adsorbent surface.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Adsorpsi, Desain Box-Behnken, Response Surface Methodology, Ekstraksi, Silika Gel, Adsorption, Box-Behnken Design, Response Surface Methodology, Extraction, Silica Gel. |
| Subjects: | Q Science > QD Chemistry Q Science > QD Chemistry > QD547 Flocculation, precipitation, adsorption, etc. Q Science > QD Chemistry > QD75.2 Chemistry, Analytic T Technology > TP Chemical technology > TP156 Crystallization. Extraction (Chemistry). Fermentation. Distillation. Emulsions. |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis |
| Depositing User: | Nabila Eka Yuningsih |
| Date Deposited: | 11 Jul 2022 07:54 |
| Last Modified: | 11 Jul 2022 07:54 |
| URI: | http://repository.its.ac.id/id/eprint/94980 |
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