Yulikasari, Andriyan (2022) Aplikasi Komposit Fotokatalis Sbe/Zno Pada Proses Ozonasi Katalitik Untuk Mendegradasi Rhodamine B. Masters thesis, Institut Teknologi Sepuluh Nopember Surabaya.
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Abstract
Ozonasi katalitik yang menggabungkan antara katalis padat dengan ozon memiliki kemampuan yang baik dalam mengdegradasi bahan organik kompleks di air limbah. Jenis katalis heterogen yang paling banyak digunakan adalah material berpori karena memiliki luas permukaan yang tinggi, seperti Spent Bleaching Earth (SBE) yang mempunyai kemampuan adsorpsi yang cukup tinggi dan telah terbukti memiliki kemampuan katalitik pada proses ozonasi. Disamping itu, proses katalitik dalam degradasi polutan sering pula memanfaatkan material fotokatalis seperti ZnO. Tujuan dari penelitian ini adalah mengaplikasikan komposit SBE/ZnO untuk menjerap polutan organik di air limbah dan sekaligus mendegradasinya melalui proses ozonasi katalitik. Penelitian ini dilakukan untuk menghasilkan removal dari proses ozonasi katalitik dengan berbagai variabel uji; diantaranya dosis katalis SBE/ZnO, flow rate ozon, dan pH larutan. Penelitian ini dilakukan pada skala lab dengan reaktor batch menggunakan air limbah sintetik berupa larutan zat pewarna Rhodamine B. Parameter uji dalam menentukan tingkat removal adalah Chemical Oxygen Demand (COD) dan warna. Proses optimasi kondisi operasional dilakukan dengan metode Response Surface Method (RSM). Karakteristik komposit SBE/ZnO dianalisis secara rinci melalui SEM-EDX, BET, XRD, dan FTIR. Hasil penelitian menunjukkan bahwa partikel ZnO menempel pada permukaan SBE dan berpartisipasi dalam degradasi melalui proses fotokatalitik dan peningkatan removal. Selama proses ozonasi katalitik, SBE/ZnO mempercepat laju mineralisasi Rhodamine B sebesar 8,1% jika dibandingkan dengan proses AOPs. Removal warna dan COD Rhodamine B dicapai dalam waktu 12 menit sebesar 97,43% dan 70,03% di bawah kondisi pH 7, dosis katalis 0,5 g/L, dan flow rate ozon 3 L/min yang diperkirakan melalui metode RSM. Rentang nilai pH 3, 5, dan 7 tidak memberikan dampak berarti dalam removal warna Rhodamine B. Dosis katalis 0,5 g/L menyediakan jumlah luas permukaan dan situs aktif paling optimul untuk mengadsorpsi Rhodamine B. Pengaruh flow rate ozon 3 L/min meningkatkan 35,11% removal warna Rhodamine B. Penurunan kemampuan fotokatalis SBE/ZnO sebesar 55,23% menunjukkan regenerasi fotokatalis SBE/ZnO belum mampu memberikan hasil yang baik. Sementara itu, pengujian GC-MS berhasil mengidentifikasi 17 senyawa intermediates sebagai bagian dari mekanisme degradasi Rhodamine B melalui proses fotokatalitik dan katalitik
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Catalytic ozonation which combines solid catalysts with ozone has a good ability to degrade complex organic matter in wastewater. The type of heterogeneous catalyst that is most widely used is porous material because it has a high surface area, such as Spent Bleaching Earth (SBE) which has a fairly high adsorption ability and has been proven to have catalytic ability in the ozonation process. In addition, catalytic processes in pollutant degradation often use photocatalyst materials such as ZnO. The purpose of this research is to apply SBE/ZnO composite that can absorb organic pollutants in wastewater and degrade them through a catalytic ozonation process at the same time. The removal of the catalytic ozonation process with various test variables; including SBE/ZnO catalyst dose, ozone flow rate, and solution pH. This research was conducted on a lab scale with a batch reactor using synthetic wastewater of Rhodamine B dye. The test parameters used as a reference in determining the level of degradation efficiency were Chemical Oxygen Demand (COD) and color. The operational condition optimization process is carried out using the Response Surface Method (RSM). The characteristics of the SBE/ZnO composite was analyzed in detail through SEM-EDX, BET, XRD, and FTIR. The result showed that ZnO particles adhered to the SBE surface and participate in degradation through photocatalytic processes and increase the removal. During the catalytic ozonation process, SBE/ZnO accelerated the rate of Rhodamine B mineralization by 8,1% when compared to the AOPs process. Rhodamine B color and COD removal were achieved within 12 minutes by 97.43% x and 70.03% under conditions pf pH 7, catalyst dose og 0,5 g/L, and ozone flow rate of 3 L/min estimated by RSM method. The range of pH values of 3, 5, dan 7 had no significant impact on Rhodamine B removal. A catalyst dose of o.5 g/L provide the most optimal amount of surface area and active site for use to adsorb Rhodamine B. effect of ozone flow rate 3 L/min increased 3.11% of Rhodamine B removal. The decrease in the ability of SBE/ZnO by 55.23% indicates that the regeneration of SBE/ZnO has not been able to provide good results. Meanwhile, the GC-MS test identified 17 intermediates as part of the Rhodamine B degradation mechanism through photocatalytic and catalytic processes
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTL 632.6 Yul a-1 |
| Uncontrolled Keywords: | komposit fotokatalis, ozonasi katalitik, removal, SBE/ZnO |
| Subjects: | Q Science > QD Chemistry > QD716 Photocatalysis. |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Environmental Engineering > 25101-(S2) Master Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 23 Dec 2022 02:56 |
| Last Modified: | 23 Dec 2022 02:56 |
| URI: | http://repository.its.ac.id/id/eprint/95282 |
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