Salsabila, Zahra (2024) Adsorpsi Zat Warna Malasit Hijau Dengan Aluminosilikat Mesopori dari Lerak (Sapindus rarak) Sebagai Surfaktan Alami. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Adsorben silika mesopori dengan surfaktan alami Sapindus rarak yang disintesis melalui metode sol-gel dan hidrotermal telah digunakan untuk adsorpsi malasit hijau. Sapindus rarak digunakan sebagai agen pengarah pori material yang ramah lingkungan. Dalam proses sintesis, digunakan HCl dengan variasi konsentrasi (0; 1; 1,5; 2; dan 3 M) untuk mengontrol karakteristik pori dan material hasil sintesis. Silika mesopori hasil sintesis dikarakterisasi dengan XRD, FTIR, FESEM, dan adsorpsi-desorpsi N2. Hasil XRD menunjukkan keberadaan silika amorf pada material pada 2θ sekitar 21-25°. Spektrum FTIR menunjukkan puncak serapan pada bilangan gelombang 1082 dan 960 cm-1 untuk mode vibrasi Si-O-Si sebagai spektra karakteristik material silika mesopori. Analisis dengan FESEM menunjukkan bahwa material silika mesopori memiliki morfologi awan cumulonimbus. Hasil fisisorpsi nitrogen sampel aluminosilikat mesopori konsentrasi HCl 0 M mempunyai luas permukaan eksternal sebesar 181,59 m2/g dengan diameter pori 3,78 nm. Penerapan material silika mesopori sebagai adsorben malasit hijau menunjukkan kapasitas adsorpsi sebesar 111,11 mg/g pada adsorben silika mesopori. Seluruh sampel menunjukkan kesesuaian terhadap kinetika orde dua semu. Isoterm Langmuir tepat untuk menggambarkan mekanisme adsorpsi monolayer.
Kata kunci: Adsorpsi, Aluminosilikat mesopori, HCl, Malasit hijau, Sapindus rarak
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Mesoporous silica adsorbent with natural surfactant Sapindus rarak synthesised by sol-gel and hydrothermal methods has been used for the adsorption of malachite green. Sapindus rarak is used as an eco-friendly pore-directing agent. In this synthesis process, HCl with varying concentrations (0; 1; 1.5; 2; and 3 M) is used to control the pore characteristics and properties of the synthesized material. The synthesised mesoporous silica was characterised by XRD, FTIR, FESEM, and N2 adsorption-desorption. The XRD results indicate the presence of amorphous silica in the material at 2θ around 21-25°. The FTIR spectrum shows absorption peaks at wavenumbers 1082 and 960 cm-1 for Si-O-Si vibration modes, characteristic of mesoporous silica material. FESEM analysis shows shows that the mesoporous silica material has a cumulonimbus cloud morphology. Nitrogen physisorption results of the mesoporous aluminosilicate sample with 0 M HCl concentration show an external surface area of 181.59 m²/g with a pore diameter of 3.78 nm. The application of mesoporous silica material as an adsorbent for malachite green shows an adsorption capacity of 111.11 mg/g for mesoporous silica adsorbent. All samples conform to pseudo-second-order kinetics. The Langmuir isotherm is suitable for describing the monolayer adsorption mechanism.
Keywords: Adsorption, Mesoporous aluminosilicate, HCl, Malachite green, Sapindus rarak
Item Type: | Thesis (Other) |
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Uncontrolled Keywords: | Adsorpsi, Aluminosilikat mesopori, HCl, Malasit hijau, Sapindus rarak Adsorption, Mesoporous aluminosilicate, HCl, Malachite green, Sapindus rarak |
Subjects: | Q Science > QD Chemistry > QD181.S6 A4 Aluminum silicates |
Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis |
Depositing User: | Zahra Salsabila |
Date Deposited: | 12 Aug 2024 03:27 |
Last Modified: | 12 Aug 2024 03:27 |
URI: | http://repository.its.ac.id/id/eprint/114747 |
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