Aminudin, Mukhamad Rojib (2025) Pengaruh Jenis Asam Pada Sintesis Aluminosilikat Mesopori Dari Kaolin Bangka Dengan Surfaktan Alami Dari Buah Lerak (Sapindus Rarak DC) Dan Aplikasinya Pada Adsorpsi Malachite Green Dalam Air. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sintesis aluminosilikat mesopori (MA) dengan metode sol-gel dan hidrotermal telah berhasil dilakukan. Kaolin bangka digunakan sebagai sumber Al dan Si secara langsung tanpa pengolahan terlebih dahulu, dan ekstrak buah lerak digunakan sebagai surfaktan alami pembentuk pori material karena memiliki kandungan utama senyawa saponin. Koloidal silika ditambahkan sebagai pencapai rasio Si/Al. Struktur dan ukuran pori aluminosilikat mesopori dipengaruhi oleh beberapa faktor sintesis, salah satunya adalah jenis asam yang digunakan dalam proses sintesis. Penelitan ini bertujuan untuk mengetahui pengaruh jenis asam yang digunakan dalam sintesis terhadap karakteristik material aluminosilikat yang dihasilkan. Pada penelitian ini digunakan tiga asam halida yaitu asam HCl, HBr, dan HI yang menghasilkan material aluminosilikat yaitu KHCl, K-HBr dan K-HI secara berturut-turut. Seluruh material aluminosilikat hasil sintesis telah dikarakterisasi menggunakan XRD, FTIR, FE-SEM, EDX, adsorpsi-desorpsi N2 dan TEM serta TGA. Kinerja material hasil sintesis diuji dalam adsorpsi malachite green (MG). Hasil analisis XRD menunjukkan semua material aluminosilikat sebagai fase amorf. Morfologi dari FE-SEM dan TEM menunjukkan semua material berbentuk bulat dan beragregat dengan ukuran pori meso. Material K-HI mencapai persen penghilangan MG dan kapasitas adsorpsi paling optimal (92% dan 86 mg/g) karena luas permukaan spesifiknya lebih tinggi (195,33 m2/g) dibandingkan dengan K-HCl (187,46 m2/g) dan K-HBr (188,91 m2/g). Daya tarik elektrostatik, pengisian pori, dan ikatan hidrogen merupakan beberapa interaksi utama antara adsorben MA dan adsorbat MG. Proses adsorpsi MG mengikuti model kinetika pseudo orde kedua dan model isoterm Freundlich. Hasil termodinamika adsorpsi menunjukkan bahwa proses adsorpsi MG oleh semua sampel adsorben berlangsung secara spontan dan endotermik.
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The synthesis of mesoporous aluminosilicate (MA) by sol-gel and hydrothermal methods has been successfully carried out. Bangka kaolin was used as a source of Al and Si directly without prior processing, and soapberry fruit extract is used as a natural surfactant to form material pores because it has a main content of saponin compounds. Colloidal silica was added to achieve the Si/Al ratio. The structure and pore size of mesoporous aluminosilicate were influenced by several synthesis factors, one of which is the type of acid used in the synthesis process. This study aims to determine the effect of acid type used in synthesis on the characteristics of aluminosilicate material produced. In this study, three halide acids were used, namely HCl, HBr, and HI acids, which produced aluminosilicate materials, namely K-HCl, K-HBr and K-HI respectively. All synthesized aluminosilicate materials have been characterized using XRD, FTIR, FE-SEM, EDX, N2 adsorption-desorption and TEM and TGA. The performance of the synthesized materials was tested in the adsorption of malachite green (MG). The results of XRD analysis showed that all aluminosilicate materials were amorphous phases. The morphology of FE-SEM and TEM showed that all materials were spherical and aggregated with mesopore size. K-HI material achieved the most optimal MG removal efficiency and adsorption capacity (92% and 86 mg/g) due to its higher specific surface area (195.33 m2/g) compared to K-HCl (187.46 m2/g) and K-HBr (188.91 m2/g).
Electrostatic attraction, pore filling, and hydrogen bonding were the main interactions between MA adsorbent and MG adsorbate. The MG adsorption process followed the pseudo second-order kinetic model and Freundlich isotherm model. The adsorption thermodynamic results showed that the adsorption process of MG by all adsorbent samples was spontaneous and endothermic.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Bangka Kaolin, Mesoporous Aluminosilicate, Sapindus rarak DC, Acid-Effect, Malachite green, Adsorption, Kaolin Bangka, Aluminosilikat mesopori, Pengaruh Asam, Adsorpsi |
| Subjects: | Q Science > QD Chemistry > QD181.S6 A4 Aluminum silicates Q Science > QD Chemistry > QD547 Flocculation, precipitation, adsorption, etc. |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis |
| Depositing User: | Mukhamad Rojib Aminudin |
| Date Deposited: | 03 Feb 2025 07:31 |
| Last Modified: | 03 Feb 2025 07:31 |
| URI: | http://repository.its.ac.id/id/eprint/117882 |
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