Pengaruh Penambahan H₂O₂ Terhadap Kinerja Membran Geopolimer Berbasis Metakaolin Capkala dalam Pemisahan Metilen Biru

Aldi, Kiagus Muhammad (2025) Pengaruh Penambahan H₂O₂ Terhadap Kinerja Membran Geopolimer Berbasis Metakaolin Capkala dalam Pemisahan Metilen Biru. Other thesis, Institut Teknologo Sepuluh Nopember.

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Abstract

Membran geopolimer merupakan membran yang disintesis dengan mencampur aluminosilikat dengan larutan basa pengaktif. Pada penelitian ini, aluminosilikat diperoleh dari metakaolin hasil kalsinasi dari kaolin Capkala. Membran geopolimer dievaluasi dengan melakukan variasi penambahan H2O2 sebesar 2%, 2,5%, dan 3% dari massa total, serta pengaruhnya terhadap morfologi, porositas, kuat lentur, daya serap air, dan kinerja filtrasi serta adsorpsi metilen biru. Modifikasi membran ini dilakukan dengan menambahkan H₂O₂ 7% sebagai agen pembentuk pori untuk keperluan filtrasi metilen biru. Reaksi H₂O₂ menghasilkan gas O₂ yang membentuk pori saat geopolimer mengeras (hardening). Pori yang dihasilkan adalah 147,2 μm untuk MG 3%, 112,8 μm untuk MG 2,5%, dan 105 μm untuk MG 2%. Sampel MG 2% memiliki densitas dan kekuatan mekanik yang lebih baik dibandingkan MG 2,5% dan MG 3%. Hasil filtrasi menunjukkan bahwa MG 2% memiliki persentase rejeksi tertinggi mencapai 99,57%, sedangkan MG 3% memiliki persentase rejeksi terendah yaitu 90,17%. Penambahan konsentrasi metilen biru tidak menurunkan persentase rejeksi secara signifikan tetapi menyebabkan penurunan fluks larutan karena fouling. Penambahan H2O2 mempengaruhi jumlah dan ukuran pori membran, yang berdampak pada pori terbuka, densitas, porositas, absorpsi air, serta kinerja membran secara keseluruhan.
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Geopolymer membranes are membranes synthesized by mixing aluminosilicate with an alkaline activating solution. In this study, aluminosilicate was obtained from metakaolin, which was produced by calcining kaolin from Capkala. The geopolymer membrane was evaluated by varying the addition of H₂O₂ at concentrations of 2%, 2.5%, and 3% by total mass, and analyzing its effects on morphology, porosity, flexural strength, water absorption, and the filtration and adsorption performance of methylene blue. The membrane modification was done by adding 7% H₂O₂ as a pore-forming agent for the filtration of methylene blue. The reaction of H₂O₂ generates O₂ gas that creates pores during the hardening of the geopolymer. The resulting pore sizes were 147.2 μm for MG 3%, 112.8 μm for MG 2.5%, and 105 μm for MG 2%. MG 2% sample had better density and mechanical strength compared to MG 2.5% and MG 3%. Filtration results showed that MG 2% had the highest rejection percentage at 99.57%, while MG 3% had the lowest rejection percentage at 90.17%. Increasing the methylene blue concentration did not significantly reduce the rejection percentage but did decrease the solution flux due to fouling. The addition of H₂O₂ affected the number and size of the membrane pores, which impacted open pores, density, porosity, water absorption, and overall membrane performance.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Filtration, Geopolymer, Membrane, Methylene blue.
Subjects:	Q Science > QD Chemistry > QD117 Absorption Q Science > QD Chemistry > Polymerization Q Science > QD Chemistry > QD63.S4 Separation (Technology)
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Kiagus Muhammad Aldi
Date Deposited:	04 Feb 2025 02:42
Last Modified:	04 Feb 2025 02:42
URI:	http://repository.its.ac.id/id/eprint/117971

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