Porositas Membran Geopolimer Metakaolin Capkala Dan Pengaruhnya Terhadap Pemisahan Metilen Biru Dari Pelarut Air

Lailiyah, Nur (2025) Porositas Membran Geopolimer Metakaolin Capkala Dan Pengaruhnya Terhadap Pemisahan Metilen Biru Dari Pelarut Air. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Membran geopolimer berpori menjadi salah satu solusi untuk pemisahan metilen biru (MB) dari pelarut air. Membran geopolimer dapat disintesis dari kaolin Capkala, namun kandungan silika yang tinggi dapat memengaruhi morfologi pori dan kinerja membran. Penelitian ini bertujuan untuk mempelajari pengaruh rasio Si/Al dan konsentrasi H2O2 terhadap struktur pori, morfologi dan kinerja membran dalam pemisahan MB. Membran geopolimer disintesis dari metakaolin melalui proses kalsinasi kaolin Capkala pada temperatur 550°C selama 2 jam. Variasi rasio Si/Al(1,50; 1,25; 1,00; 0,75 dan 0,50) disiapkan dengan menambahkan Al2O3 ke metakaolin. Selanjutnya dilakukan variasikan konsentrasi H2O2 0%; 5%; 7% dan 9%. Pengaruh rasio Si/Al dan konsentrasi H2O2 terhadap karakteristik dianalisisi menggunakan beberapa instrumen yaitu SEM, XRD, FTIR, ASTM C20-00, ASTM C191-21 dan ASTM C230. Hasil menunjukkan bahwa penurunan rasio Si/Al meningkatkan kekentalan dan mempercepat setting time, sehingga terbentuk pori yang lebih kecil dan seragam. Sedangkan peningkatan konsentrasi H2O2 meningkatkan diameter pori. Kondisi optimum diperoleh pada rasio Si/Al 1 dan H2O2 7%, yang menghasilkan permeabilitas air tertinggi (370 L/m²·jam·bar), volume pori terbuka 7,71 cm³, porositas 48,8%, daya serap air 69,2%, rejeksi MB 99,26% serta permeabilitas permeat 30,57 L/m2·jam·bar. Analisis kuantitatif menunjukkan bahwa fluks lebih dipengaruhi oleh konsentrasi H2O2 (66,01%), sedangkan efisiensi rejeksi dipengaruhi oleh rasio Si/Al (71,05%). Hasil penelitian mengindikasikan bahwa rasio Si/Al dan konsentrasi H2O2 berpengaruh terhadap pembentukan pori, sehingga meningkatkan kinerja membran geopolimer pada proses pemisahan MB dari pelarut air.

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Porous geopolymer membranes are one of the solutions for the separation of methylene blue (MB) from water solvents. Geopolymer membranes can be synthesized from Capkala kaolin, but the high silica content can affect pore morphology and membrane performance. This study aims to study the influence of Si/Al ratio and H2O2 concentration on pore structure, morphology and membrane performance in MB separation. The geopolymer membrane is synthesized from metakaolin through the Calcination process of Capkala kaolin at a temperature of 550°C for 2 hours. Variations in the Si/Al rasio (1.50; 1.25; 1.00; 0.75 and 0.50) were prepared by adding Al2O3 to the metakaolin. Furthermore, a 0% H2O2 concentration was varied; 5%; 7% and 9%. The effect of Si/Al ratio and H2O2 concentration on characteristics was analyzed using several instruments, namely SEM, XRD, FTIR, ASTM C20-00, ASTM C191-21 and ASTM C230. The results showed that a decrease in the Si/Al ratio increased the viscosity and accelerated the setting time, resulting in smaller, uniform pores forming. While an increase in H2O2 concentration increases the pore diameter.Optimum conditions were obtained at a ratio of Si/Al 1 and H2O2 of 7%, which resulted in the highest water permeability (370 L/m²·h·bar), open pore volume of 7.71 cm³, porosity of 48.8%, water absorption 69.2%, MB rejection of 99.26% and permeability of 30.57 L/m2·h·bar. Quantitative analysis showed that flux was more influenced by H2O2 concentration (66.01%), while rejection efficiency was influenced by Si/Al ratio (71.05%). The results indicated that the ratio of Si/Al and H2O2 concentration had an effect on pore formation, thereby improving the performance of the geopolymer membrane in the process of separating MB from water solvents.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Membran geopolimer, metakaolin Capkala, permeabilitas, rejeksi, wastewater,Geopolymer membrane, Capkala Metakaolin, permeability, rejection, wastewater
Subjects:	Q Science Q Science > QD Chemistry Q Science > QD Chemistry > QD181.S6 A4 Aluminum silicates Q Science > QD Chemistry > QD63.S4 Separation (Technology)
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis
Depositing User:	Nur Lailiyah
Date Deposited:	04 Aug 2025 04:50
Last Modified:	04 Aug 2025 04:50
URI:	http://repository.its.ac.id/id/eprint/126334

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